Figure 2.
Saliva deuterium enrichments over time during oral deuterated water dosing in nineteen healthy older adults (age, 66±1 y) consuming a 3-day fully controlled eucaloric high-protein (1.8 g·kg bm−1·d−1) diet, where the protein was provided predominantly from animal (OMNI; n=9) or exclusively non-animal (VEG; n=10) sources. During the dietary control period (Day 2–4) participants conducted a single bout of maximal unilateral concentric isokinetic knee extension exercise (5 x 30 contractions) each morning. On Day 1 participants were loaded with a total of 400 mL deuterated water, with 50 mL maintenance doses consumed daily thereafter. Data were analysed with mixed-effects ANOVA. Values are means, with their standard errors represented by vertical bars. * indicates a main effect of time (P<0.05). # indicates a significant difference to preceding time points (P<0.05). Treatment × time interaction effect; P= 0.5565, Treatment; P= 0.3847, Time; P= 0.0026.