Table 1. Phenotype data.

Variable (units)	Mean ± SD
DXA Fat-free mass (kg)	Middle-aged
	Pre	53.9±10.5#
	Post	54.9±10.4#
	Younger, trained	69.2±7.7
VL muscle thickness (cm)	Middle-aged
	Pre	1.88±0.45#
	Post	2.02±0.37*,#
	Younger, trained	2.87±0.35
VL peak knee extensor torque (N•m)	Middle-aged
	Pre	115±43#
	Post	127±40*,#
	Younger, trained	230±46

Legend: Data are from n=16 middle-aged participants prior to and following 10 weeks of training as well as basal values in n=15 college-aged participants that were recreationally trained. Abbreviations: DXA, dual x-ray absorptiometry; VL, vastus lateralis. Symbols: *, indicates increase from Pre to Post in middle-aged participants (p<0.05); #, indicates different from younger, trained participants (p<0.05).