Comparison of Cardiovascular Parameters and Internal Training Load of Different 1-h Training Sessions in Non-elite CrossFit^® Athletes

Abstract

Purpose

The fact that CrossFit^® is the best-known and rapidly growing concept for high-intensity interval training (HIIT) and high-intensity functional training (HIFT) results in a continuous increase of athletes performing CrossFit^®. In the more than 15,000 CrossFit^® Affiliates worldwide, the training concept is usually offered in 1-h training sessions containing the CrossFit^®-related workout of the day (WOD), as well as a general warm-up, movement demonstrations, and skill training. Here, we report how physiological parameters measured by heart rate (HR) values vary during four different 1-h CrossFit^® training sessions of non-elite athletes (n = 27) in a local affiliated training center and what influencing factors may exist.

Methods

The duration of the 1-h training sessions were divided into a warm-up part (WU-part), a skill development part combined with strength exercises (A-part), followed by the WOD part (B-part).

Results

Analysis of HR values shows high training intensity (≥ 91% HR_max) not throughout the duration of each training session, only during B-part. The mean HR values in B-part differ significantly compared to the remaining training parts (P < 0.001) for all four training sessions. Comparison of different CrossFit^® experience levels revealed no significant difference in acute physiological demands and training load between beginner and experienced CrossFit^® athletes.

Conclusion

Our results may suggest that practicing CrossFit^® in 1-h training sessions combined anaerobic and aerobic exercise intensities, with the training concept allows beginners and experienced athletes to be trained with the same cardiovascular responses and training intensities.

Funding

Universität der Bundeswehr München (3147)