Swim Technique Video Analysis: Using Your Phone to Identify Technique Flaws—Advanced Applications

Introduction

The Individual Medley (IM) is the most technically demanding event in swimming: a swimmer must cover one-quarter of the race distance in each of butterfly, backstroke, breaststroke, and freestyle, in that order. In the 200m IM, each stroke is swum for 50m; in the 400m IM, each stroke is swum for 100m.

The difficulty of the IM lies not only in mastering the technique of all four strokes, but also in the “transitions”—the technical switches from butterfly to backstroke, backstroke to breaststroke, and breaststroke to freestyle—as well as in pacing the limited energy supply wisely across the entire race.

This article will break down the technical transition strategies and energy management wisdom for the four-stroke IM.

The Overall Strategic Framework of the IM

Energy Characteristics of the Four Strokes

At the same speed, the four strokes do not consume equal amounts of energy:

Stroke	Relative Energy Cost	Technical Difficulty	Role in the IM
Butterfly	Highest	High	First leg, most demanding
Backstroke	Moderate	Moderate	Second leg, recovery segment
Breaststroke	Moderate–High	High	Third leg, technical key
Freestyle	Moderate	Moderate	Final sprint leg

The Pacing Philosophy of the IM

The biggest trap in the IM is “sprinting all-out in butterfly, causing a physical collapse in the final three legs.” The typical strategy of elite IM swimmers is:

• Butterfly: Start at a high intensity (85–90% of max effort), but hold something back—don’t burn everything at the start
• Backstroke: Ease off slightly, maintain speed but allow heart rate and breathing to stabilize
• Breaststroke: Maintain technical efficiency, don’t rush to sprint, save energy for freestyle
• Freestyle: Go all-out—the finish is near, so release all remaining energy

Detailed Transition Techniques

Butterfly → Backstroke Transition

The butterfly-to-backstroke transition is relatively simple in the IM. The rules allow the body to rotate during the turn.

Wall Touch Requirement: Butterfly requires both hands to touch the wall simultaneously. After touching, you may immediately begin rotating onto your back.

Technical Points:

• After the final butterfly arm pull, rotate your body as both hands touch the wall
• By the time you push off the wall, your body is already in the supine position
• Enter the backstroke streamline glide after pushing off

Common Mistakes: Technique breaks down in the final meters of butterfly due to fatigue, causing inaccurate wall-touch timing and wasted transition time. It is recommended to specifically practice “maintaining technique in the final 10 meters of butterfly under fatigue” in training.

Backstroke → Breaststroke Transition

The backstroke-to-breaststroke transition is the most technically demanding of the four transitions.

Wall Touch Requirement: Backstroke requires the upper body (shoulder or back) to touch the wall first, but the rules allow rotating the body (turning face-down) before touching the wall to facilitate the push-off.

Technical Points:

• Begin judging the wall-touch timing about 2–3 meters from the wall
• After the final arm pull, begin rotating the body downward (from backstroke to a face-down position)
• Plant both feet on the wall and push off with a breaststroke-style kick (both feet pushing simultaneously)
• After pushing off, glide in the breaststroke streamline (arms squeezed against the ears)

Common Mistakes:

• Rotating too late, resulting in a poor body position at the wall
• Misjudging the distance, requiring an extra (or one fewer) half arm stroke, disrupting the rhythm
• Forgetting to switch to the breaststroke push-off (both feet) instead of the backstroke push-off after touching the wall

Training Method: Repeatedly practice the “final backstroke turn” in training, setting a goal: the entire transition from sensing the wall to pushing off should be completed within 1.2 seconds.

Breaststroke → Freestyle Transition

The breaststroke-to-freestyle transition is the key transition into the final sprint leg.

Wall Touch Requirement: Breaststroke requires both hands to touch the wall simultaneously—one hand alone is not allowed.

Technical Points:

• After the final breaststroke kick, extend both hands forward to touch the wall simultaneously
• Immediately perform a freestyle flip turn to push off the wall
• After pushing off, enter the freestyle streamline and begin kicking in preparation for swimming

Energy Management: After the breaststroke-to-freestyle transition, the final sprint leg of the IM begins. Before touching the wall, assess remaining energy to decide the freestyle starting pace—if energy is sufficient, enter a high tempo immediately; if breaststroke has consumed significant energy, you may need the first few stroke cycles to find your rhythm.

Overall Pacing Control in the IM

Technical Priorities for Each Leg

Under the high fatigue of an IM, set the most important technical cue for each stroke:

• Butterfly: Maintain the entry rhythm (timing of the two kicks)
• Backstroke: Maintain body roll (avoid lateral swaying of the body)
• Breaststroke: Maintain streamline in the kick (feet must close together for the glide)
• Freestyle: Maintain high-elbow pull (ensure every stroke generates propulsion)

Recommended IM Training Sets

Specific training for technical transitions:

1. Transition Drills: Repeatedly swim “15m butterfly → turn → 15m backstroke,” focusing on transition technique, 10–12 reps per set
2. Transitions Under Fatigue: Swim 200m freestyle first, then immediately follow with IM transition drills to simulate transitions under late-race fatigue
3. Full IM Technique Swim: Swim a complete 200m or 400m IM at low intensity, consciously executing technical adjustments at each transition

Practical Advice

• Improvement in IM technique first comes from improving each of the four strokes individually; you cannot rely on “transition tricks” to compensate for technical flaws in any single stroke
• Breaststroke is often the “weak-link stroke” in the IM; it is recommended to add extra dedicated breaststroke training volume
• In Taiwan’s swimming competitions, the individual medley is a popular event, and most county/city swimming championships include the 200m IM
• Use a stopwatch during training to record split times for each leg, identify your slowest stroke, and prioritize strengthening it
• The wall-touch rules for IM transitions are complex; it is recommended to study the rules thoroughly before competition and deliberately practice legal wall touches in training

Conclusion

The individual medley is a comprehensive test of swimming technique. It tests not only your technique in all four strokes, but also your ability to maintain technique under continuous fatigue and your wisdom in energy allocation. For swimmers aiming to improve their overall swimming ability, IM training is one of the most effective methods—because it forces you to confront your technical weaknesses in each stroke and execute technical movements under the most uncomfortable fatigue. Master the four-stroke IM, and you have mastered the full picture of swimming technique.

Related Reading

• Individual Medley (IM) Strategy: Energy Allocation Across the Four-Stroke Order
• Individual Medley (IM) Energy Management: Strength and Weakness Planning in the Four-Stroke Order
• Race Strategy for IM Events: Four-Stroke Order and Pacing Allocation
• 200m IM Four-Stroke Transition Strategy: The Art of Order Advantage and Energy Allocation