Gender muscle recovery during isokinetic exercise

Area of Science:

• Exercise Physiology
• Biomechanics
• Human Performance

Background:

• Muscle strength recovery between sets is crucial for maintaining performance during resistance exercise.
• Understanding the influence of rest intervals (RI) on isokinetic performance is vital for optimizing training protocols.

Purpose of the Study:

• To investigate the effects of 60-second and 120-second rest intervals on isokinetic knee extension peak torque (PT) in sedentary young adults.
• To determine if gender influences the recovery of peak torque at different angular velocities (60°/s and 180°/s).

Main Methods:

• Seventeen women and sixteen men performed 3 sets of 10 unilateral isokinetic knee extensions at 60°/s and 180°/s.
• Rest intervals of 60s and 120s were counterbalanced across two testing days.
• A 3-way mixed-factor ANOVA analyzed the data (gender x rest interval x sets).

Main Results:

• Both males and females showed decreased peak torque with a 120s RI at 60°/s (p<0.05).
• Females did not exhibit a significant PT decline at 180°/s with either RI.
• Males showed a significant PT decrease only with the 60s RI at 180°/s.

Conclusions:

• Sedentary individuals require over 120s RI for full peak torque recovery at 60°/s.
• Women achieve full quadriceps strength recovery with 60s and 120s RI at 180°/s.
• Men require a 120s RI at 180°/s for full quadriceps strength recovery.