Sensitivity analysis for biceps brachii thickness (mm) during the experimental protocol. Data represent subjects with the 1-RM performance <25 kg at D0. Samples sizes are n = 17, 31 and 20 for the Pea, Whey and Placebo groups, respectively. $: Significant difference within each group compared with D0 (P < 0.05 – P < 0.0001). £: Significant difference compared with D42 for the Pea group only (P < 0.05). *: Between group comparison between D0 and D84 (P < 0.05).