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Effects of high-speed power training on muscle performance and braking speed in older adults
Sayers SP, Gibson K
Journal of Aging Research 2012 Feb 28;(426278):Epub
clinical trial
5/10 [Eligibility criteria: Yes; Random allocation: Yes; Concealed allocation: No; Baseline comparability: Yes; Blind subjects: No; Blind therapists: No; Blind assessors: No; Adequate follow-up: No; Intention-to-treat analysis: Yes; Between-group comparisons: Yes; Point estimates and variability: Yes. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed*

We examined whether high-speed power training (HSPT) improved muscle performance and braking speed using a driving simulator. 72 older adults (22 m, 50 f; age 70.6 +/- 7.3 yrs) were randomized to HSPT at 40% one-repetition maximum (1RM) (HSPT: n = 25; 3 sets of 12 to 14 repetitions), slow-speed strength training at 80%1RM (SSST: n = 25; 3 sets of 8 to 10 repetitions), or control (CON: n = 22; stretching) 3 times/week for 12 weeks. Leg press and knee extension peak power, peak power velocity, peak power force/torque, and braking speed were obtained at baseline and 12 weeks. HSPT increased peak power and peak power velocity across a range of external resistances (40 to 90% 1RM; p < 0.05) and improved braking speed (p < 0.05). Work was similar between groups, but perceived exertion was lower in HSPT (p < 0.05). Thus, the less strenuous HSPT exerted a broader training effect and improved braking speed compared to SSST.

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