Is Mechanical Power a Valid and Relevant Parameter to Control Resistance Training?

Area of Science:

• Exercise Physiology
• Sports Biomechanics
• Strength and Conditioning

Background:

• Theoretical models suggest maximal mechanical power occurs at intermediate loads and velocities.
• This has led to the common use of optimal power load prescriptions in resistance training.
• This review critically evaluates the validity and relevance of mechanical power for controlling resistance training.

Purpose of the Study:

• To critically evaluate mechanical power as a parameter for controlling resistance training.
• To assess its relevance for improving athletic performance.
• To compare its effectiveness against traditional strength-based training methods.

Main Methods:

• Literature review of studies on mechanical power in resistance training.
• Analysis of theoretical models of force-velocity and force-length relationships.
• Evaluation of neuromuscular adaptations and methodological limitations.

Main Results:

• Many studies on power-oriented training have limitations (short duration, untrained participants, inconsistent protocols).
• Estimating mechanical power in complex movements has methodological challenges, questioning its validity.
• Maximal strength is a stronger predictor of mechanical power and athletic performance than optimal power load.

Conclusions:

• The optimal power load concept overlooks sport-specific demands and individual differences.
• A periodized approach focusing on maximal strength, then speed-based exercises, is recommended for power development.
• Mechanical power has limited value for load control in performance-oriented resistance training.