Table 3.

Peak power and peak power normalized to cell size of vastus lateralis MHC I and IIa single muscle fibers before and after high-intensity PRT in young and older women

Fiber Type	Young Women		Older Women
	Pre	Post	Pre	Post
Peak power, μN·Fl/s
MHC I	8.8±0.5	10.0±0.8	11.2±1.5	12.4±1.6
MHC IIa	45.5±4.3	58.3±5.1*	56.2±6.5	63.9±10.3
Normalized power, W/l
MHC I	2.0±0.2	2.2±0.2	2.1±0.1	2.4±0.2
MHC IIa	12.2±0.9	12.0±0.8	13.1±0.3	13.3±0.5

Values are means ± SE.

^*P < 0.05 vs. Pre.