Brick Training Recovery: Managing Delayed Onset Muscle Soreness (DOMS) from Dual Muscle Group Loading

After a 4-hour brick workout, waking up the next day feeling like you’ve been run over by a truck—that’s DOMS (Delayed Onset Muscle Soreness). A brick session simultaneously engages both cycling and running muscle groups, making DOMS 2–3 times more severe than a single-sport workout. This article compiles a complete recovery strategy.

1. The Science Behind DOMS

Primary Causes

1. Micro muscle fiber tears: Caused by eccentric contractions (especially pronounced during the run segment)
2. Inflammatory response: Immune reaction during muscle repair
3. Connective tissue damage: Micro-injuries to fascia and tendons
4. Metabolic waste accumulation: Lactic acid is already metabolized, but other metabolites remain

Timeline

Time	Symptoms
0–6 hours post-workout	Mild tightness
6–24 hours	Soreness begins
24–48 hours	Peak soreness (DOMS peak)
48–72 hours	Improvement begins
72–96 hours	Mostly recovered
96–120 hours	Full recovery

2. The Unique Nature of Brick DOMS

Soreness Distribution

Based on actual data, soreness ratios 24–48 hours after a brick session:

Area	Soreness Ratio	Cause
Quadriceps (VL, VMO)	85%	Dual load from cycling + running
Gastrocnemius	70%	Running impact
Soleus	65%	Running posture
Iliopsoas	60%	Hip flexion movement
Gluteus maximus	55%	Cycling push-down
Gluteus medius	50%	Running stability
Lower back muscles	45%	Fixed cycling position
Posterior deltoids	30%	Residual from swimming (if swimming included)

Systemic Fatigue

Compared to cycling or running alone:

• Energy expenditure: A 5-hour brick burns approximately 3,500–4,500 kcal
• Total fatigue score: 1.5–2 times that of a single-sport session
• Immune system stress: Immunity drops 30% for 24 hours post-workout

3. The Golden 30-Minute Recovery Window Post-Workout

Immediate Refueling (0–30 minutes)

Item	Amount	Purpose
Carbohydrates	1.2g/kg body weight	Replenish glycogen
Protein	0.4g/kg body weight	Muscle repair
Fluids	150% of fluid lost	Rehydration
Sodium	800–1,500mg	Replenish electrolytes

Using a 70kg athlete as an example:

• 84g carbs (about 1.5 bananas + 1 bowl of rice)
• 28g protein (4 eggs or 2 cups of soy milk)
• 1,500ml electrolyte drink

Recommended Combinations

Option A: 500ml chocolate milk + 2 bananas + 1 salt tablet

Option B: Recovery drink (Endurox R4, SiS Rego) + banana

Option C: 1 bowl of rice + 3 eggs + banana + salted rice ball

4. Cold Therapy and Heat Therapy

Ice Bath / Cold Plunge

• Temperature: 10–15°C
• Duration: 10–15 minutes
• Timing: Within 1–2 hours post-workout
• Effect: Reduces inflammation, alleviates DOMS by approximately 20–30%

Note: Ice baths reduce muscle adaptation signals and are not suitable for long-term use during race preparation—reserve them for post-race or key recovery periods.

Contrast Bath

• Hot water 38–42°C for 3 minutes + cold water 10–15°C for 1 minute
• Repeat 3–5 rounds
• End with cold water
• Improves blood circulation, accelerates metabolite clearance

Heat Packs and Massage

• Timing: 24 hours after training or later
• Methods: Hot towel, heat pack, hot water bottle
• Effect: Relaxes tightness, improves blood flow

5. Active Recovery

Within 24 Hours Post-Brick

Wrong approach: Staying completely sedentary → blood circulation stagnates, soreness lasts longer

Right approach: Light activity

Activity	Duration	Intensity
Walking	20–30 minutes	Easy
Easy indoor trainer ride	20–30 minutes	Z1 (< 60% max HR)
Swimming (easy backstroke, freestyle)	20 minutes	50% intensity
Yoga / stretching	30 minutes	Dynamic stretching

24–48 Hours Post-Brick

• Light swimming for 30 minutes
• 45 minutes on the bike trainer at Z1–Z2
• No running (avoid re-stimulating running muscle groups)

48–72 Hours Post-Brick

• Decide based on DOMS severity
• If soreness < 30%, technical drills are acceptable
• If soreness > 50%, continue active recovery

6. Foam Rolling and Massage Guns

Foam Rolling

Recommended rolling sequence (60–90 seconds per area):

1. Triceps surae (calf complex)
2. Biceps femoris (hamstrings)
3. Quadriceps
4. Iliotibial band
5. Gluteus maximus
6. Gluteus medius
7. Upper back

Massage Gun

• Recommended areas: Large muscle groups
• Avoid: Spine, directly over joints, bruised areas
• Duration: 2–3 minutes per area
• Frequency: Post-workout + the following day

Professional Massage

• Sports massage (deep tissue): 24–48 hours post-workout
• Avoid forceful “percussive-style” massage
• Recommended once every 2 weeks

7. The Role of Sleep

Why Sleep Matters for DOMS

• Growth hormone secretion: Released during deep sleep, repairs muscle
• Inflammation control: Sleep deprivation → increased inflammatory markers
• Memory and adaptation: Neurological adaptations are reinforced during sleep

Sleep Recommendations Post-Brick

Training Volume	Recommended Sleep Duration
Short brick (< 1 hour)	7–8 hours
Medium brick (1–3 hours)	8–9 hours
Long brick (> 3 hours)	9–10 hours

Improving Sleep Quality

• No alcohol the night after training
• No coffee within 2 hours post-workout
• Stay away from screens 1 hour before bed
• Keep room temperature at 20–22°C
• Go to bed 30–60 minutes earlier on the night after training

8. Nutritional Supplements (Recovery Period 24–72 Hours)

Anti-Inflammatory Foods

• Salmon, mackerel (Omega-3)
• Turmeric + black pepper
• Blueberries, cherries (anthocyanins)
• Green tea (catechins)
• Dark chocolate (flavonoids)

High-Protein Foods

• Chicken breast, lean beef
• Eggs, Greek yogurt
• Tofu, edamame
• Whey protein (1.6–2.0g/kg body weight per day)

Supplement Recommendations (Use with Caution)

Supplement	Dosage	Effect
Omega-3	2~3g/day	Anti-inflammatory
Vitamin D3	2000 IU/day	Repair, immunity
Magnesium	300~400mg/day	Muscle relaxation
Glutamine	10g/day	Immune support
Vitamin C	500~1000mg/day	Antioxidant

Note: Supplements are not a cure-all; prioritize whole foods.

IX. Practices to Avoid for Counterproductive Results

Mistake 1: High-Dose Painkillers

NSAIDs such as Ibuprofen can relieve pain, but they suppress muscle adaptation signals. They can be used short-term after racing, but should be avoided during training.

Mistake 2: Immediate Ice Bath After Training + Long-Term Use

Ice baths reduce inflammation but also reduce adaptation; their use should be minimized during the race preparation period.

Mistake 3: Over-Stretching Muscles with DOMS

During DOMS, muscles are in a state of micro-damage, and deep static stretching may worsen the damage. Switch to dynamic stretching or yoga flow instead.

Mistake 4: Drinking Alcohol After Training

Alcohol causes dehydration, suppresses testosterone, and disrupts sleep—all recovery elements are affected.

Mistake 5: Training Again Before DOMS Subsides

Forcing training only accumulates fatigue, leading to overtraining syndrome. When soreness is > 50%, switch to active recovery.

X. Practical Recovery Timeline

Using a Saturday long Brick (4+1) as an example:

Time	Action
0~30 min after training	Chocolate milk + banana + salt tablets
30~60 min	Shower (alternating hot and cold)
60~120 min	Full meal
120~180 min	Foam rolling for 30 minutes
That evening	Sleep early (1 hour earlier)
Sunday morning	30-minute walk
Sunday afternoon	Easy 45-minute trainer ride + foam rolling
Sunday evening	Massage gun + sleep early
Monday	Complete rest or 30-minute swim
Tuesday	Short Brick or running intervals

Brick training is an “investment,” and recovery strategy is “compound interest”—get recovery right, and every Brick session makes you stronger.

Related Reading

• The Timeline of Muscle Soreness After Cycling: Repair Physiology of DOMS from Hour 24 to Hour 96
• Recovery Strategies After Strength Training: How Endurance Athletes Can Keep Lifting from Draining Sport-Specific Workouts
• Managing Muscle Soreness After Running: Causes of DOMS and Methods to Speed Up Recovery
• New Prevention Strategies for Delayed Onset Muscle Soreness (DOMS) After Training: A Synthesis of Research Recommendations