Description of training loads using whole-body exercise during high-intensity interval training

Area of Science:

• Exercise Physiology
• Sports Science
• Biomedical Engineering

Background:

• High-intensity interval training (HIIT) is a popular training method.
• Understanding the physiological demands of HIIT is crucial for optimizing training programs.
• Quantifying both external and internal training loads provides a comprehensive view of exercise stress.

Purpose of the Study:

• To describe external and internal training loads during a single session of high-intensity interval training (HIIT) body work.
• To analyze changes in physiological markers and perceived exertion throughout the HIIT protocol.

Main Methods:

• Twenty male participants performed a 20-minute HIIT body work protocol with a 1:1 work-to-rest ratio.
• Exercises included jumping jacks, mountain climbers, burpees, and squat jumps at "all-out" intensity.
• Monitoring included total movement capacity, blood lactate, ratings of perceived exertion (RPE), and perceived recuperation.

Main Results:

• A total of 382±89 movements were recorded, with significant differences between exercises.
• Blood lactate concentrations increased significantly post-exercise (0.98±0.16 to 14.10±1.66 mmol/L).
• Movement capacity remained high after the fifth set, and perceived recuperation significantly decreased from the first set.

Conclusions:

• The HIIT body work protocol induced high physiological stress, evidenced by increased internal load indicators.
• The findings highlight the significant impact of a single session of intense exercise on the body.
• This study quantifies the load experienced during a specific HIIT body work session.