Table 1. Characteristics of the volunteers. Characteristics Mean ± SD (Range) Age (year) 22.7 ± 2.8 (18; 27) Height (cm) 181.8 ± 8.0 (171.0; 201.0) Body mass (kg) 77.4 ± 12.4 (63.5; 105.2) Percent fat mass (%) 9.8 ± 3.2 (4.5; 14.2) Weekly training volume (hours per week) Weekly strength training volume (hours per week) Weekly boxing training volume (hours per week) 13.2 ± 3.2 (10.0; 19.0) 4.9 ± 2.4 (8.0; 2.0) 8.3 ± 1.7 (11.0; 7.0)