The Complete Guide to Strength Training for Triathletes: Periodization, Squats, Deadlifts, and In-Season Maintenance Doses

Coach’s Opening: The Athlete Who “Couldn’t Break Through the Same Pace No Matter How He Trained”

A few years ago, I coached an office-worker triathlete competing in sprint-distance races (51.5 km)—let’s call him A-Kai. A-Kai trained hard, logging ten hours a week across swimming, cycling, and running. His cardiovascular numbers looked great, and his VO₂max ranked in the top tier among age-group amateurs. But he had a strange problem: his power always dropped in the final stretch after the 40 km mark on the bike, his legs felt like lead after the T2 transition into the run, and his pace in the last 5 km collapsed from 5:10 per kilometer to 5:55.

I reviewed his entire season of training logs. Cardiovascular capacity wasn’t the issue—the problem was that he had never seriously trained strength. Like many Taiwanese triathlon enthusiasts, he believed “lifting weights will make you bulky, heavier, and hurt your cycling and running,” so he poured all his time into aerobic workouts. The result: plenty of engine, but the chassis and drivetrain couldn’t sustain prolonged output.

That winter, I had him cut back some of the ineffective volume and switch to heavy strength training twice a week, built around squats and deadlifts. Three months later, back at the test track, his run split in the sprint triathlon improved by nearly two and a half minutes—and his body weight only dropped 0.8 kg. The muscle didn’t make him slow or heavy; it made every stride and every pedal stroke more efficient.

In this article, I want to lay out in full the strength training principles I’ve accumulated over fifteen years of coaching athletes—from first-time finishers to those who earned Kona slots—while continuously cross-checking them against the sports science literature. It’s going to be a long read, but if you’ve ever hit that plateau where “no matter what you do, you can’t break through,” this one’s worth reading slowly.

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1. Building the Mindset First: Why Do Triathletes Need Strength Training?

Strength Training Isn’t About “Getting Big,” It’s About “Being More Efficient”

Triathlon is an endurance sport, and many people instinctively think “lifting weights builds muscle, adds weight, and hurts race performance”—that’s the biggest misconception. For endurance athletes, properly programmed strength training pursues not hypertrophy, but improvements in neuromuscular efficiency—meaning at the same pace, your body uses less effort and less energy to get the job done.

In sports science, there’s a key term for this: exercise economy. There’s running economy and cycling efficiency. The better your economy, the less oxygen and energy you consume at the same speed or power output, the longer you can hold on, and the slower you fade in the later stages.

A recent systematic review and meta-analysis of endurance cyclists (published in European Journal of Applied Physiology, 2025) found that heavy strength training has a significant positive effect on cycling efficiency and cycling performance (including time-to-exhaustion and time-trial performance), and that the improvements come primarily from enhanced cycling efficiency and anaerobic power—not from raising VO₂max. In other words, strength training tunes your “drivetrain and chassis,” not your “engine displacement.”

Direct Evidence for Triathlon

Closer to our needs is a 2021 study published in International Journal of Sports Physiology and Performance, which examined exactly “strength training improving exercise economy in triathletes during simulated triathlon.” The strength program in the study progressed from moderate loads (8–12 reps, below ~75% of 1RM) to heavy loads (1–6 reps, above 85% of 1RM), and the results showed:

• Cycling economy improved significantly in the early phase (roughly the first 14 weeks)
• Running economy improved significantly in the later phase (weeks 14–26)
• And body weight did not increase

This matches my experience with A-Kai: when strength training is done right, you don’t get bulky, and your legs become far more durable after the transition.

The Three Big Endurance Benefits, in Plain Language

Translating the research into what I tell athletes on the ground, strength training delivers roughly three benefits:

1. More efficient (improved economy): At the same pace, your muscles do the work with less effort, glycogen and energy are used more slowly, and you have more left in the tank for the later stages.
2. More durable (fatigue resistance and injury resistance): Strong glutes, legs, and core absorb impact from foot strikes and stabilize pedal strokes, so your form degrades more slowly over long distances and you reduce the risk of overuse injuries.
3. More explosive (anaerobic and sprint capacity): For the kind of back-to-back climbs on Taiwanese courses (think Sun Moon Lake, Ninety-Nine Peaks, or the East Entrance to Wuling), when you need short bursts of high power output, strength gives you an extra gear.

Coach’s note: The benefits of strength training are “slow-burning.” That meta-analysis also highlighted a key point—the longer the intervention, the more pronounced the effect on economy. Don’t give up just because you don’t see results after three weeks. Strength is an investment measured in “seasons,” not weeks.

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2. The Science: Why “Heavy Weights, Low Reps”?

Neural Recruitment vs. Hypertrophy

When endurance athletes train strength, the core goal is rewiring the nervous system: teaching the brain to recruit more motor units, more synchronously, in an instant, while improving the force-output efficiency of each contraction. The stimulus this requires is high intensity, low to moderate repetitions—not the bodybuilding-style “pump, failure, chasing soreness.”

The literature points in a consistent direction: heavy-load, relatively low-rep (e.g., 3–6 reps per set) resistance training is highly effective for improving strength and neuromuscular function, and compared to high-volume, moderate-intensity training, it leaves less residual muscle soreness and fatigue. This matters enormously for triathletes—we still have to swim, bike, and run the next day. If strength work leaves your legs so sore you can barely walk, that’s doing more harm than good.

Why Do Low Reps Actually Cause “Less Fatigue”?

Many people assume heavier weights mean more fatigue, but that’s not the case. When you do 3–5 reps at 85%+ of your 1RM, the metabolic stress (lactate accumulation, metabolite buildup) is actually low—the main load falls on the nervous system. In contrast, moderate-weight sets of 12–15 reps to failure create high metabolic stress and more micro-damage to muscle fibers, leading to more noticeable delayed-onset muscle soreness (DOMS) the next day. For those of us who also have to carry three disciplines of aerobic work, “heavy but short” beats “light but long.”

Squats and Deadlifts: Why Do These Two Movements Rule?

If I could only pick two movements, I would always choose the squat and the deadlift. The reasons are simple:

• The squat trains the quads, glutes, and the entire lower-body extension chain—this is the core power source for pedal stroke force on the bike and push-off propulsion in running.
• The deadlift strengthens the posterior chain (glutes, hamstrings, lower back, and core)—the key to running propulsion, maintaining a forward-leaning posture, and stable kicking in the swim, while also serving as a safeguard for the lower back against the strain of prolonged cycling positions.

These two movements are multi-joint, large-muscle-group, high-neural-demand compound lifts. One session covers everything, and the return on investment far exceeds a pile of single-joint machine exercises.

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3. Practical Approach: Periodizing Your Strength Training

This is the heart of the article. Strength training can’t be a one-size-fits-all approach used year-round; it has to follow the macrocycle of your triathlon training. I typically divide a season into four phases.

Periodization Overview Table

Phase	Timing	Strength Goal	Load (1RM %)	Reps	Sessions per Week
Anatomical Adaptation	4–6 weeks pre-season	Build foundation, learn movement patterns, condition tendons and ligaments	50–65%	12–15 reps × 3 sets	2–3
Maximum Strength	6–10 weeks in base phase	Neural recruitment, absolute strength	80–90%	3–6 reps × 3–5 sets	2
Power Conversion	3–4 weeks entering specific phase	Convert strength to speed, explosive power	30–60% (fast movement)	3–6 reps (explosive) × 3–4 sets	1–2
In-Season Maintenance	Throughout race season	Maintain existing strength, prevent loss	80–85%	3–5 reps × 2–3 sets	1

Here’s a breakdown of each phase.

Phase 1: Anatomical Adaptation

This is the starting point of every season, especially for lifting beginners or athletes returning from the off-season. The goal is not to get stronger, but to let tendons, ligaments, and connective tissue adapt to the load first, and to groove proper movement patterns.

• Light loads (50 to 65% of 1RM), higher reps (12 to 15), slower movements with a focus on control.
• The most important thing in this phase is movement quality: whether your squat reaches proper depth, whether your knees cave in, whether your back rounds on the deadlift, whether your core is braced.
• Many people in Taiwan rush to add weight and skip this phase, only to get injured the moment they increase the load in Phase 2, ruining their entire season. These four to six weeks are non-negotiable.

Phase 2: Maximum Strength

This is the “main event” for endurance benefits. Loads go up to 80 to 90% of 1RM, reps drop to 3 to 6, and the focus is on neural recruitment efficiency.

• Rest between sets needs to be sufficient (3 to 5 minutes), because this phase trains the nervous system, not metabolic endurance. Insufficient rest will cause the quality of your next set to fall apart.
• Twice a week is the most common and effective frequency in the research (the meta-analyses and studies mentioned earlier generally use around 13 weeks, twice per week).
• In this phase, your squat and deadlift numbers will steadily climb, but you won’t feel much soreness—that’s a good sign, meaning you’re training the nervous system, not causing muscle damage.

Phase 3: Power Conversion

This converts “absolute strength” into “explosive power you can use at race pace.” Loads drop (30 to 60%), but movement speed must be fast—fast squats, box jumps, medicine ball throws, fast rows, etc.

• The focus here is “rate of force development,” allowing you to react faster when you need a sudden output (surges, chasing the pack, short steep climbs).
• This is especially helpful for sprinting, climbing out of the saddle, and re-engaging your legs after a transition.

Phase 4: In-Season Maintenance—The Phase Most People Get Wrong

This is what I want to emphasize: Many athletes completely stop strength training once the race season starts. This is a big mistake.

Research and field experience both show that if you completely stop strength training, strength (especially neural adaptations) begins to decline within a few weeks, and the gains you worked so hard to build over the winter will slowly leak away. But the in-season training volume is high, and you need to save your legs for racing—you can’t do too much. The answer is—drop to a “maintenance dose.”

The principles of a maintenance dose are:

• Maintain intensity, reduce volume. Keep the weight at or above 80% of 1RM (intensity is the key to maintaining strength), but cut sets down to 2 to 3, and only train once per week.
• A single session of 20 to 30 minutes is enough: two to three heavy, low-rep sets each of squats and deadlifts, and you’re done.
• Schedule it on a day further from your key races and at least a day away from high-intensity aerobic sessions (e.g., Monday for a weekend race).

In one sentence: In the maintenance phase, your goal isn’t to get stronger; it’s to “not get weaker,” using the minimum effective dose to hold onto your winter gains.

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4. A Sample Weekly Schedule You Can Follow

Here’s an integrated base-phase example I often give to athletes from sprint triathlon up to half-distance 226 (113 km), assuming three non-strength aerobic sessions per week (actual triathletes do more aerobic sessions; this is just to illustrate how strength fits in).

Maximum Strength Phase—Integrated Weekly Schedule Example

Day	Morning	Afternoon/Evening	Notes
Monday	Swim (technique + aerobic)	Strength A: Squat-focused session	Strength after swimming to avoid affecting bike/run
Tuesday	Bike (aerobic endurance)	Rest	Day after strength, allow lower body recovery
Wednesday	Run (easy run)	Strength B: Deadlift-focused session	Keep the run easy to avoid heavy legs
Thursday	Swim	Rest/Stretching	Active recovery
Friday	Bike (intervals)	Rest	High-intensity aerobic not on the same day as strength
Saturday	Long bike	—	Build aerobic volume on the weekend
Sunday	Long run	—	No strength scheduled at all

Strength A (Squat-focused session) Exercise Examples

Exercise	Sets × Reps	Load	Rest Between Sets
Barbell Back Squat	4 × 5	82–88% 1RM	3–4 minutes
Bulgarian Split Squat	3 × 6 (per leg)	Moderate	2 minutes
Deadlift (assistance, light)	2 × 6	70%	2 minutes
Plank/Dead Bug Core	3 sets	Bodyweight	1 minute

Strength B (Deadlift-focused session) Exercise Examples

Exercise	Sets × Reps	Load	Rest Between Sets
Conventional Deadlift	4 × 4	85–90% 1RM	4 minutes
Goblet Squat	3 × 8	Moderate	2 minutes
Hip Thrust	3 × 8	Moderate to heavy	2 minutes
Side Plank + Anti-rotation Core	3 sets	Bodyweight	1 minute

Key Principle: Always schedule strength sessions after an aerobic session that day, or on an easy aerobic day, and try not to cram them into the same day (morning/evening) as high-intensity intervals or long-distance sessions. If you tax the same legs twice in one day, recovery quality will suffer badly, and it’s not worth it.

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5. Common Mistakes and Fixes

Having coached many athletes, here are the most common and damaging mistakes I’ve compiled.

Mistake 1: Training Strength Like “Cardio”—High Reps, Chasing the Burn

Symptoms: Doing 15 to 20 reps per set, chasing the pump and soreness, resting only one minute between sets.

Problem: This style of training creates a lot of metabolic fatigue and muscle damage, which wrecks the quality of your aerobic sessions the next day, while doing little for neural adaptations.

Fix: Go back to the principles of heavy weight, low reps (3 to 6), and long rest periods (3+ minutes). You’re not in the gym to sculpt a physique; you’re building the foundation for three sports.

Mistake 2: Doing the Same Program All Year

Symptoms: Regardless of pre-season or race season, always doing the same “squat 3×10, deadlift 3×10.”

Problem: Your body adapts; without periodization, there’s no continued progress. And doing high volume during the race season will steal the leg power you need for racing.

Fix: Follow the four-phase periodization from Section 3, adjusting intensity and volume according to the season.

Mistake 3: Completely Stopping Strength Training During Race Season

Symptoms: As soon as race season arrives, you cut out all strength work, thinking, “I need to focus on racing now.”

Problem: The hard-earned neural adaptations will fade week by week, and by the end of the season, your efficiency advantage will be gone.

Fix: Keep 1 session per week, 20 to 30 minutes as a maintenance dose. Keep intensity at 80% or above, but cut the volume down to 2 to 3 sets.

Mistake 4: Stacking Strength and High-Intensity Aerobic Work on the Same Day, Same Legs

Symptoms: Morning bike intervals, then squats and deadlifts in the evening.

Problem: This is the extreme version of the “interference effect.” Both sessions suffer, and recovery can’t keep up.

Fix: Prioritize strength sessions on easy aerobic days, or separate them from high-intensity sessions by at least a day.

Mistake 5: Compensating with Bad Form and Skipping Core Work

Symptoms: Arching your back on deadlifts, knees caving in on squats, and never doing dedicated core training.

Problem: Compensatory movement patterns are the number one source of injury. Without core stability, your posture will break down and power will leak during long distances.

Fix: During the anatomical adaptation phase, master proper form before adding load. Include 2 to 3 core exercises in every session (planks, dead bugs, side planks, anti-rotation).

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6. Actionable Advice for Athletes of Different Levels

Beginners / Finish-Oriented Newcomers

What you need most right now is not maximal strength, but learning proper technique and building a durable body.

• Train 2 times per week, focusing on anatomical adaptation content: moderate loads, 12 to 15 reps, with emphasis on movement quality.
• Start with easier variations of squats and deadlifts, such as goblet squats and Romanian deadlifts.
• Core and glute activation are a must—these will make the biggest difference in “not falling apart on the run” and “no pain on the bike.”
• Your goal is to finish. Strength training helps reduce injury risk and makes those final kilometers less painful.

Intermediate Athletes with a Few Years of Experience, Aiming for a PB

It’s time to seriously commit to the full four-phase periodization.

• 8 to 10 weeks of maximal strength before the season, pushing squats and deadlifts solidly to 80 to 90% of 1RM.
• Add 3 to 4 weeks of power conversion during the specific preparation phase.
• Strictly follow the 1 session per week maintenance dose during race season—don’t let your gains slip away.
• Schedule strength sessions into your overall periodization, making sure they don’t clash with high-intensity aerobic sessions.

Advanced Athletes Targeting Long Distance / Kona Qualification

For athletes racing 226 (226 km Ironman) and chasing top-100 national rankings, the value of strength lies in late-race fatigue resistance and posture maintenance.

• Absolute strength during the maximal strength phase is still fundamental, but pay more attention to single-leg stability (split squats, single-leg deadlifts) and anti-rotation core work, because posture breakdown over long distances is the real killer.
• The maintenance dose must be carried through the entire long race season, even if it’s just once a week.
• Training volume is already high, so strength work must be “quality over quantity”—use the minimum effective dose to preserve your efficiency advantage.

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7. Practical Considerations for the Taiwanese Context

Race Course Terrain Determines Your Strength Priorities

Taiwan’s triathlon and long-distance race courses are varied. On relatively flat courses like Taitung’s Living Lake, you need steady, sustained output efficiency; but if the course has significant climbing, or you regularly train on routes like Beiyi Highway, Fengguizui, or Sun Moon Lake, then climbing power and fatigue-resistant strength become more critical—don’t skimp on the power conversion phase training.

In Hot, Humid Weather, Strength Sessions Should Be More Conservative

Taiwan’s summers are humid and hot, and aerobic training already carries heavy fatigue and dehydration. During this season, when doing strength work, it’s better to hold intensity steady and cut volume a bit more rather than stacking sessions and grinding yourself down. Stay on top of hydration and electrolytes. Recovery after training (sleep, nutrition) matters more than squeezing in those extra two sets.

Recovery Nutrition in a Restaurant-Heavy Environment

Eating out is convenient in Taiwan, but triathletes often don’t get enough protein after strength sessions. After training, aim for adequate high-quality protein (a serving of meat from a buffet, a glass of unsweetened soy milk with a tea egg, or a chicken breast bento box are all viable options), paired with carbohydrates to replenish glycogen. When recovery nutrition is on point, the benefits of strength training will truly show.

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7-2. Deep Dive into the “Interference Effect”: Why Strength and Aerobic Training Clash

The single most important concept for triathletes to understand about strength training is the interference effect. This is an old topic in exercise physiology, debated for decades: when strength training and endurance training are performed simultaneously (so-called “concurrent training”), strength gains can sometimes be “diluted” by large volumes of endurance work.

To put it simply: at the cellular level, your body activates partially different—and even somewhat conflicting—signaling pathways for “getting stronger” versus “getting more durable.” When your endurance training volume is very high, your body leans toward adapting in the “aerobic metabolism” direction. If strength training isn’t programmed properly under these conditions, the rate of strength gain will be compromised.

But note—this does not mean triathletes shouldn’t do strength training; it means “the wisdom of programming” determines success or failure. The triathlon study cited earlier was able to show simultaneous improvements in economy, strength gains, and unchanged body weight precisely because the timing, intensity, and volume of both modalities were managed well. In practice, the key principles for reducing interference are:

1. Separate the timing: Avoid stacking strength sessions and high-intensity aerobic sessions on the same day, same legs. If they must be on the same day, separate them by at least 6 hours, and prioritize the session that matters most for your race that day.
2. Trade-off in volume: For advanced athletes already carrying high endurance volume, strength work should follow the “less but better” approach—heavy loads, low reps, few sets—to avoid piling on more total fatigue.
3. Order principle: Generally, place heavy strength work “after the aerobic session of the day” or on “easy aerobic days.” This lets your nervous system be freshest for aerobic work, then do strength after, reducing mutual interference.

I often tell athletes: The interference effect isn’t telling you to skip strength training; it’s telling you not to do it “haphazardly.” Get the periodization, timing, and dosage right, and strength and aerobic training won’t just stop fighting—they’ll amplify each other.

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7-3. Real-World Case Studies: Season Plans for Three Different Athletes

The following data reflects the actual training configuration logic I use with my athletes; the athlete scenarios are composite examples for illustration.

Case A: 40-Year-Old Office Worker, Goal: Improve in Olympic-Distance Finish

This athlete (the prototype of A-Kai from the opening) has long work hours and limited weekly training time. My plan for him: 2 strength sessions per week during the winter base phase (1 squat-focused, 1 deadlift-focused), dropping to 1 maintenance session per week during race season.

• 10-week base phase, squats starting at 65% of 1RM, progressing weekly up to 85%.
• Due to limited time, strength sessions were capped at 40 minutes, focusing only on the most effective compound movements plus core.
• Result: That season, his Olympic-distance run split improved by nearly two and a half minutes, and he no longer had “lead legs” after transitions.

Case B: Amateur Intermediate Athlete, Goal: Sub-5-Hour 113 Half Ironman

This type of athlete has a solid aerobic base but often makes the mistake of “completely stopping strength training during race season.” I helped him restructure:

• 8-week maximal strength phase before the season, pushing squats and deadlifts solidly to heavy loads.
• 3 weeks of power conversion inserted into the specific preparation phase (box jumps, fast squats) to boost climbing and transition power.
• Strictly maintained 1 maintenance session per week during race season, doing only 2 heavy sets each of squats and deadlifts.
• The key was convincing him: The maintenance dose won’t steal your race legs; it preserves the efficiency advantage you built over the winter.

Case C: Advanced Athlete, Chasing a Long-Distance Top-100 National Ranking

Training volume is already very high, so the role of strength is “insurance against late-race fatigue.”

• The maximal strength phase still builds absolute strength, but with added emphasis on single-leg stability (single-leg deadlifts, split squats) and anti-rotation core work.
• Managing the interference effect is paramount: all strength sessions are placed on easy aerobic days, strictly separated from key long sessions and high-intensity sessions.
• The maintenance dose is carried through the entire long race season—even just 20 minutes a week, never skipping.

Reference Strength Goals for Three Levels

The following relative strength (1RM divided by body weight) is provided only as directional reference. Individual variation is large, so don’t treat it as a mandatory standard or use it to compare yourself with others.

Athlete Level	Squat Relative Strength (Approximate Direction)	Deadlift Relative Strength (Approximate Direction)	Training Focus
Beginner / Finish-oriented	Around 1.0x body weight	Around 1.2x body weight	Movement quality, injury resistance
Advanced / PB-chasing	Around 1.3–1.5x body weight	Around 1.5–1.8x body weight	Maximal strength, power conversion
High-level / Long-distance	Aim for stable maintenance of current level	Aim for stable maintenance of current level	Single-leg stability, late-race fatigue resistance

Coach’s note: The table above is a “general direction,” not a threshold. Some people are naturally strong at squatting, others at deadlifting. What matters is whether you improved this season compared to last, and whether you can hold up better in the late stages of a race—not rigidly benchmarking against some number.

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Part 4 of 7: Recovery and Nutrition Arrangements on Strength Days

If you don’t follow through with recovery after strength training, the benefits won’t materialize. This is especially overlooked in Taiwan’s humid, hot, eat-out-heavy environment. Here is the recovery framework I give my athletes for strength days.

Time Point	What to Do	Practical Advice for Taiwan
30–60 minutes after training	Consume quality protein + carbohydrates	A chicken breast bento, unsweetened soy milk with tea eggs, or meat + rice from a buffet
After training until bedtime	Meet full daily protein and calorie targets	Spread daily protein intake across meals; don’t cram it all into one meal
Sleep	Prioritize 7–9 hours	Sleep is the most powerful recovery tool, surpassing any supplement
Next day	Active recovery, easy aerobic work	Easy swimming or slow riding to promote circulation and flush out fatigue

Several frequently asked nutrition points:

• Protein: For athletes combining endurance and strength, daily protein needs typically fall in the range of approximately 1.6 to 2.0 grams per kilogram of body weight (a range, not a precise prescription). Spreading intake across meals is more effective than consuming it all at once.
• Carbohydrates: Don’t cut carbs too aggressively just because you want to lose fat. Insufficient glycogen will degrade the quality of both strength sessions and aerobic sessions. On high training volume days, carbs need to keep up.
• Fluids and electrolytes: Taiwan’s summers bring heavy sweating. Strength sessions may not deplete fluids as much as long rides, but hydration and electrolytes still need attention—dehydration will drag down performance and recovery.
• Supplements: Not essential. If you really want to use them, first nail down the fundamentals of “eating enough and sleeping enough.” No supplement can replace a balanced diet and adequate sleep.

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8. FAQ

Q1: I’m afraid lifting will make me bulky and heavier, affecting my pace. What should I do?

A: This is the most common concern, but research repeatedly shows that endurance athletes training with heavy weights and low reps typically see body weight stay the same or even drop slightly (due to decreased body fat), with only limited muscle mass gain. In the triathlon study mentioned earlier, athletes improved their economy without gaining weight. What you’re pursuing is neural efficiency, not hypertrophy.

Q2: I don’t have a gym or a barbell. Can I still train?

A: You can get started, but there are limits. Bodyweight squats, split squats, hip thrusts, single-leg deadlifts, and core series can all cover the anatomical adaptation phase. However, when you reach the maximal strength phase, you need sufficient load to stimulate neural adaptation—at that point, kettlebells, dumbbells, or finding a gym with barbells would be more ideal.

Q3: How many times per week is best?

A: Twice per week during the base phase is the most common and effective frequency in the research; once per week during the in-season maintenance phase is sufficient. The key isn’t high frequency—it’s whether the intensity and periodization are correct.

Q4: Should strength sessions go before or after aerobic sessions?

A: Generally, it’s recommended to place them after that day’s aerobic session, or schedule them on easy aerobic days. The reason is that going heavy first will fatigue the legs and compromise the quality of the subsequent ride or run; also, try to avoid putting high-intensity aerobic work and strength work on the same legs on the same day.

Q5: How long until I see results?

A: Neural adaptation (feeling stronger) can be felt within a few weeks, but translating that into race economy and performance typically takes a full training cycle (8 to 12 weeks or more) to become obvious, and the longer the intervention, the better the results. This is a long-term investment—don’t rush to conclusions after just two or three weeks.

Q6: I’ve had a lower back injury before. Can I do deadlifts?

A: This depends on individual circumstances and can’t be generalized. If you have a history of injury, be sure to consult a professional first. You can start with variations that place less stress on the lower back, such as Romanian deadlifts, trap bar deadlifts, or hip thrusts, and master the movement pattern before adding load. Safety always comes before weight.

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Conclusion: Strength Is the “Most Underrated Gear” in Your Triathlon Performance

Back to A-Kai from the opening. He not only broke his PB in the standard distance, but the following year he completed his first 113 half-distance triathlon, and his run never fell apart in the late stages like it used to. He told me: “Coach, so it turns out my problem was never my cardio—my legs just couldn’t hold on.”

I want to dedicate these words to every triathlon enthusiast who has read this far. Triathlon is not a sport that only trains your cardio; it simultaneously tests your engine (cardio), drivetrain (strength), and chassis (stability and fatigue resistance). Too many people pour all their time into the engine while forgetting that the drivetrain and chassis are what determine whether you can still push forward in the late stages.

Periodize your strength training, build solid squats and deadlifts, and use maintenance doses during the race season to protect your gains—get these three things right, and you’ll find that with the same cardio, you can run and ride better times. This isn’t taking a shortcut; it’s reclaiming potential that was previously wasted.

Next winter base phase, don’t just pile on aerobic volume. Give yourself two solid strength sessions per week, invest for a full season, and on race day next year, you’ll thank your current self.

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This article is educational content and cannot replace individual assessment by a physician, physical therapist, or nutritionist. For personal injury history, physical condition, and training planning, please consult professionals.

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References

• Heavy strength training effects on physiological determinants of endurance cyclist performance: a systematic review with meta-analysis (European Journal of Applied Physiology, 2025) — https://pubmed.ncbi.nlm.nih.gov/40632222/
• Heavy strength training effects on physiological determinants of endurance cyclist performance (full text PMC) — https://pmc.ncbi.nlm.nih.gov/articles/PMC12881108/
• Strength Training Improves Exercise Economy in Triathletes During a Simulated Triathlon (International Journal of Sports Physiology and Performance, 2021) — https://pubmed.ncbi.nlm.nih.gov/33571959/
• Strength Training Improves Exercise Economy in Triathletes During a Simulated Triathlon (Human Kinetics journal page) — https://journals.humankinetics.com/view/journals/ijspp/16/5/article-p663.xml

Related Reading

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