Racial and sex differences in strength, peak power, movement velocity, and functional ability in middle aged and older adults
| dc.contributor.advisor | Hurley, Ben F. | en_US |
| dc.contributor.author | Doldo, Neil | en_US |
| dc.contributor.department | Kinesiology | en_US |
| dc.contributor.publisher | Digital Repository at the University of Maryland | en_US |
| dc.contributor.publisher | University of Maryland (College Park, Md.) | en_US |
| dc.date.accessioned | 2005-08-03T13:12:28Z | |
| dc.date.available | 2005-08-03T13:12:28Z | |
| dc.date.issued | 2005-01-11 | en_US |
| dc.description.abstract | To determine sex and race differences in strength, muscle power, movement velocity, and functional ability, knee extensor strength and muscle power normalized for muscle volume was measured in 79 middle-aged and older adults (30 men and 49 women, age range 50-85 yrs). Results indicated that men had 55% greater muscle volume (MV; P < 0.001), 24% greater 1 RM strength (P < 0.01), 9% greater muscle quality (MQ; 1 RM/MV; P < 0.05), 26% greater peak muscle power (PP; P < 0.01), and 14% greater MPQ (PP/MV; P < 0.001) than women. However, women displayed a 38% faster peak movement velocity than men when expressed per unit of muscle (movement velocity quality) (PV/MV; P < 0.001). Race analysis showed that African Americans had 20% greater MV than Caucasians (P < 0.001), but 11% lower MQ (P < 0.01) and a 17% lower PV/MV (P < 0.05) than Caucasians of similar age. Men displayed a 22% faster stair climb time than women, while Caucasians exhibited 19% and 16% faster times in rapid pace gait and 8-ft up-and-go, respectively. Thus, despite greater strength and power per unit of muscle in men, women have a faster knee movement velocity per unit of muscle than men. Moreover, African Americans have greater knee extensor muscle volume than Caucasians, but exhibit lower muscle quality and movement velocity quality. | en_US |
| dc.format.extent | 655543 bytes | |
| dc.format.mimetype | application/pdf | |
| dc.identifier.uri | http://hdl.handle.net/1903/2331 | |
| dc.language.iso | en_US | |
| dc.subject.pqcontrolled | Health Sciences, General | en_US |
| dc.title | Racial and sex differences in strength, peak power, movement velocity, and functional ability in middle aged and older adults | en_US |
| dc.type | Thesis | en_US |
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