Table 1.

Age-related changes in muscle power and muscle strength

Study	Gender	Measurement/joint/movement	Age range (years)	Study design	Changes with aginga
Dean et al. 2004 [73]	F	IK/hip/FLX, EXT	21–82	CS	↓22–33%
Johnson et al. 2004 [72]	F	IK, IM/hip/AD, AB	21–91	CS	↓24–34% IK, ↓44–56% IM
Kubo et al. 2007 [71]	M	IM/ankle/PF	20–77	CS	↓40%
Morse et al. 2005 [70]	M	IM/ankle/PF	25.3 ± 3.5–73.8 ± 3.5	CS	↓47%
Petrella et al. 2005 [69]	M, F	IT/knee/EXT	20–75	CS	↓41–137%
Lanza et al. 2003 [68]	M	IT, IM/knee, ankle/EXT, DF	20–85	CS	↓26–32%

K isokinetic, IM isometric, IT isotonic, FLX flexion, EXT extension, AD adduction, AB abduction, PF plantar flexion; DF dorsiflexion, CS cross-sectional

^aExpressed as percent change with aging