Does resistance exercise lifting velocity change with different rest intervals?
Yukina Mochizuki1, Mika Saito1, Hiroki Homma1
1Graduate School of Health and Sport Science, Nippon Sport Science University, Tokyo, Japan.
The Journal of Sports Medicine and Physical Fitness
|August 1, 2022
Summary
Men experience a decline in lifting velocity with shorter rest intervals during resistance exercise, while women maintain their velocity. This highlights sex-based differences in recovery during strength training.
Area of Science:
- Exercise Physiology
- Sports Science
- Human Performance
Background:
- Investigating sex-based differences in physiological responses to resistance training is crucial for optimizing exercise prescriptions.
- Understanding the impact of rest interval duration on lifting performance is essential for effective strength training programs.
Purpose of the Study:
- To examine the influence of varying rest intervals on lifting velocity during resistance exercise, specifically analyzing sex differences.
- To determine if men and women exhibit different recovery capacities between sets of resistance exercise.
Main Methods:
- Twenty-two trained individuals (11 men, 11 women) participated in a crossover study.
- Subjects performed parallel squats at 70% of 1-repetition maximum (1RM) with 90s, 150s, and 240s rest intervals.
- Lifting velocity and blood lactate concentrations were measured to assess performance and recovery.
Main Results:
- A significant interaction between sex and average lifting velocity over 10 repetitions was observed.
- Men showed a decrease in average lifting velocity across sets, particularly with shorter rest intervals.
- Women did not exhibit a significant decrease in lifting velocity, suggesting better recovery.
Conclusions:
- Short rest intervals (90s, 150s) may be insufficient for men to fully recover lifting velocity between sets.
- Women appear to recover lifting velocity more effectively, even with shorter rest intervals, compared to men.
- These findings suggest sex-specific considerations for rest interval prescription in resistance training.
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