Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Local Muscle Endurance and Strength are the Best Predictors of Crossfit Open 2020 in Amateur Athletes

Version 1 : Received: 31 May 2021 / Approved: 1 June 2021 / Online: 1 June 2021 (12:32:59 CEST)

A peer-reviewed article of this Preprint also exists.

Tibana, R.A.; de Sousa Neto, I.V.; Sousa, N.M.F.; Romeiro, C.; Hanai, A.; Brandão, H.; Dominski, F.H.; Voltarelli, F.A. Local Muscle Endurance and Strength Had Strong Relationship with CrossFit® Open 2020 in Amateur Athletes. Sports 2021, 9, 98. Tibana, R.A.; de Sousa Neto, I.V.; Sousa, N.M.F.; Romeiro, C.; Hanai, A.; Brandão, H.; Dominski, F.H.; Voltarelli, F.A. Local Muscle Endurance and Strength Had Strong Relationship with CrossFit® Open 2020 in Amateur Athletes. Sports 2021, 9, 98.

Abstract

This study analyzed the relationship between anthropometric measures, cardiorespiratory capacity, strength, power and local muscle endurance with performance in the CrossFit® Open 2020. For this, 17 volunteers (6 women) (29.0 ± 7.2 years; 70.5 ± 9.8 kg) completed, on separate weeks, body composition (dual-energy x-ray absorptiometry), maximal oxygen consumption (2km row test), muscle strength (1RM back and front squat, isometric peak torque), and muscle power (1RM snatch and clean & jerk), and muscle endurance (Tibana test), which were compared with performance during the CrossFit® Open 2020. Multiple linear regression showed that for the CrossFit Open 2020.1 and 2020.2 workouts, the score in the Tibana test was the only variable that explained the outcomes (Beta = -0.78, p < 0.01 for 2020.1 workout and Beta = 0.82, p < 0.01 for 2020.2 workout). Performance in the CrossFit Open 2020.3 and 2020.4 workouts were explained through the relative strength (Beta = 0.58, p = 0.02 for 2020.3 workout and Beta = 0.50, p = 0.04 for 2020.4 workout). Lastly, Tibana test had the greatest influence on CrossFit Open 2020.5 workout (Beta = -0.75, p < 0.01). A local muscle endurance and muscle strength may be used to predict CrossFit® open workout performance.

Keywords

Functional fitness training; athletic performance; exercise testing

Subject

Medicine and Pharmacology, Immunology and Allergy

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