Overall, there were negligible effects on FM (Figure 2a). For %BF, post hoc comparisons yielded no significant differences between training groups (p = 0.633) when adjusting for baseline values; 2MIN-HIIT (mean ± SD: 27.5% ± 1.0%) versus CON (mean ± SD: 28.8% ± 1.4%; p = 0.145), or 1MIN-HIIT (mean ± SD: 27.8% ± 1.9%) versus CON (p = 0.276) (Figure 2c). For LM, post hoc comparisons yielded no significant difference between 2MIN-HIIT (mean ± SD: 69.5 ± 3.4 kg) and 1MIN-HIIT (mean ± SD: 71.6 ± 3.2) (p = 0.898), and no significant difference between 2MIN-HIIT and CON (mean ± SD: 71.0 ± 5.4 kg) (p = 0.751) or 1MIN-HIIT and CON (p = 0.811) (Figure 2b). However, 2MIN-HIIT yielded an average 2.1 kg increase in LM, and 1MIN-HIIT resulted in an average 1.7 kg increase, compared to an average 0.4 kg decrease in LM for the CON, when compared to baseline values.