Table 1.

Summary of studies examining the relationship between leg power and osteoarthritis in older adults

Authors	Participants	Mean Age ± SD (years)	Design	Leg Power Measure	Findings
Robertson et al. 1998 (29)	26 patients waiting for a primary unilateral knee replacement	72 ± 8	Cross-sectional	Nottingham power rig	↓ leg power in affected leg
Barker et al. 2004 (44)	123 patients with clinical knee OA diagnosis	69.5 ± 8.1	Cross-sectional	Nottingham power rig	↓ leg power in adults with knee OA diagnosis
Juhakoski et al. 2008 (45)	118 men (n=35) and women (n=83) with hip OA	66.7 ± 6.5	Cross-sectional	Concept II dynamometer	Leg power predicts physical function better than pain with hip OA
Berger et al. 2012 (46)	40 community-dwelling men (n=21) and women (n=19) with knee OA	60.7 ± 6	Cross-sectional	Biodex system III isotonic dynamometer	↓ leg power is associated with ↑ functional deficit in older adults with knee OA
Sayers et al. 2010, 2012 (47, 48)	33 community-dwelling older adults with an OA diagnosis and 38 healthy community dwelling older adults without an OA diagnosis33	OA diagnosis (67.6 ± 6.8) Without OA diagnosis (HSPT: 74.1 ± 6.4 years, SSST: 70.1 ± 7.0, CON: 72.8 ± 4.1)	Randomized controlled trial (power training intervention)	Keiser pneumatic leg press	↑ in leg power was similar among older adults with and without a diagnosis of knee OA33

OA= Osteoarthritis; HSPT= High-Speed Power Training; SSST= Slow-Speed Strength Training; CON= Control