Post-activation Potentiation in Propulsive Force after Specific Swimming Strength Training

Area of Science:

• Sports Science
• Biomechanics
• Exercise Physiology

Background:

• Post-activation potentiation (PAP) can enhance muscular force production following intense activity.
• The application of PAP in swimming, particularly concerning propulsive force, requires further investigation.
• Understanding how individual force levels influence PAP responses is crucial for training optimization.

Purpose of the Study:

• To determine if a specific conditioning activity induces post-activation potentiation in swimming propulsive force.
• To examine if a swimmer's baseline force level impacts their response to post-activation potentiation.
• To assess the effects of the conditioning activity on peak force and impulse in tethered swimming.

Main Methods:

• Eight competitive swimmers (18.4±1.3 years) performed maximal 10-second tethered swimming tests.
• Tests were conducted before and at 2.5 and 6.5 minutes after a conditioning set (8×12.5m with paddles and parachute).
• Peak force, rate of force development, and impulse were measured to evaluate propulsive force and potentiation.

Main Results:

• The conditioning activity did not induce post-activation potentiation; instead, it reduced peak force and impulse.
• Rate of force development remained unaffected by the conditioning activity.
• Positive correlations indicated that lower force swimmers experienced greater performance decrements.

Conclusions:

• The prescribed conditioning activity may induce excessive fatigue, outweighing potential post-activation potentiation benefits in swimmers.
• The intensity and rest intervals of the conditioning activity may need adjustment to elicit potentiation.
• This specific conditioning protocol is not recommended for competitive swimmers before events due to its detrimental effects.