Table 5.

MAPR and CS activity

	Younger		Older
	UP	HP	UP	HP
MAPR, μmol·min−1·g−1
Glutamate + malate	8.49±1.14	8.81±0.99	5.15±0.43*	5.39±0.20*
Succinate + rotenone	3.58±0.59	3.91±0.53	2.30±0.23*	2.54±0.11*
CS activity, μmol·min−1·g−1	16.7±0.9	16.1±0.9	13.2±1.1*	13.5±0.7*

Data are means ± SE. MAPR, mitochondrial ATP production rate; CS, citrate synthase.

^*P < 0.05 vs. younger participants (same diet).