Evaluation of Performance Improvements After Either Resistance Training or Sprint Interval-Based Concurrent Training

Area of Science:

• Exercise Physiology
• Sports Science
• Human Performance

Background:

• Concurrent training, combining different exercise modalities, is increasingly popular for improving multiple fitness components.
• Understanding potential interference effects between resistance training (RT) and high-intensity interval training (HIIT) is crucial for optimizing training programs.

Purpose of the Study:

• To compare the effects of concurrent sprint interval and resistance training (CST) versus traditional resistance training (RT) on strength, power, and aerobic fitness in recreationally active women.
• To investigate potential interference between RT and sprint interval training when performed concurrently.

Main Methods:

• Twenty-eight recreationally active women participated in an 11-week training program.
• Participants were assigned to either a CST group or an RT group, training 3 days per week.
• Assessments included 1-repetition maximum (1-RM) back squat, maximal isometric squats, anaerobic power, and maximal oxygen consumption (VO2max).

Main Results:

• Both CST and RT significantly improved 1-RM back squat, maximal isometric force, and average peak anaerobic power.
• Both groups showed improvements in maximal oxygen consumption (VO2max) via treadmill velocity.
• The CST group demonstrated a significantly greater improvement in maximal oxygen consumption (VO2max) compared to the RT group, indicating no interference.

Conclusions:

• Concurrent sprint interval and resistance training (CST) is effective for enhancing strength, power, and aerobic fitness in women.
• CST does not appear to interfere with the adaptive responses to resistance training.
• Coaches can consider integrating sprint interval training into existing resistance training programs to supplement endurance improvements.