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Randomized Controlled Trial
. 2009 Oct;17(4):416-43.
doi: 10.1123/japa.17.4.416.

Lower extremity muscle function after strength or power training in older adults

Anthony P Marsh  1 , Michael E Miller, W Jack Rejeski, Stacy L Hutton, Stephen B Kritchevsky
Affiliations
Randomized Controlled Trial

Lower extremity muscle function after strength or power training in older adults

Anthony P Marsh et al. J Aging Phys Act. 2009 Oct.

Abstract

It is unclear whether strength training (ST) or power training (PT) is the more effective intervention at improving muscle strength and power and physical function in older adults. The authors compared the effects of lower extremity PT with those of ST on muscle strength and power in 45 older adults (74.8 +/- 5.7 yr) with self-reported difficulty in common daily activities. Participants were randomized to 1 of 3 treatment groups: PT, ST, or wait-list control. PT and ST trained 3 times/wk for 12 wk using knee-extension (KE) and leg-press (LP) machines at approximately 70% of 1-repetition maximum (1RM). For PT, the concentric phase of the KE and LP was completed "as fast as possible," whereas for ST the concentric phase was 2-3 s. Both PT and ST paused briefly at the midpoint of the movement and completed the eccentric phase of the movement in 2-3 s. PT and ST groups showed significant improvements in KE and LP 1RM compared with the control group. Maximum KE and LP power increased approximately twofold in PT compared with ST. At 12 wk, compared with control, maximum KE and LP power were significantly increased for the PT group but not for the ST group. In older adults with compromised function, PT leads to similar increases in strength and larger increases in power than ST.

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Conflict of interest statement

The authors do not have any financial interest or conflict of interest to disclose.

Figures

Figure 1
Figure 1
Flow of participants through the study.
Figure 2
Figure 2
Changes in knee-extension (KE) and leg-press (LP) strength assessed using one-repetition maximum (1RM). Data are least-squares means in Newtons (N). PT = power training; ST = strength training.
Figure 3
Figure 3
Changes in maximum knee-extensor (KE) and leg-press (LP) power. Data are least-squares means in Watts (W). PT = power training; ST = strength training.
See this image and copyright information in PMC

References

    1. Aniansson A, Hedberg M, Henning GB, Grimby G. Muscle morphology, enzymatic activity, and muscle strength in elderly men: A follow-up study. Muscle & Nerve. 1986;9:585–591. - PubMed
    1. Bassey EJ. Longitudinal changes in selected physical capabilities: Muscle strength, flexibility and body size. Age and Ageing. 1998;27(Suppl. 3):12–16. - PubMed
    1. Bassey EJ, Fiatarone MA, O’Neill EF, Kelly M, Evans WJ, Lipsitz LA. Leg extensor power and functional performance in very old men and women. Clinical Science (London, England : 1979) 1992;82:321–327. - PubMed
    1. Bassey EJ, Harries UJ. Normal values for handgrip strength in 920 men and women aged over 65 years, and longitudinal changes over 4 years in 620 survivors. Clinical Science (London, England : 1979) 1993;84:331–337. - PubMed
    1. Bean J, Herman S, Kiely DK, Callahan D, Mizer K, Frontera WR, et al. Weighted stair climbing in mobility-limited older people: A pilot study. Journal of the American Geriatrics Society. 2002;50:663–670. - PubMed

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