Once-weekly resistance exercise improves muscle strength and neuromuscular performance in older adults.

Once-weekly resistance exercise improves muscle strength and neuromuscular performance in older adults. Research Abstract Details 

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Once-weekly resistance exercise improves muscle strength and neuromuscular performance in older adults. Abstract Text:

OBJECTIVE: To determine the effect of frequency of resistive training on gain in muscle strength and neuromuscular performance in healthy older adults. DESIGN: A randomized controlled trial with subjects assigned either to high-intensity resistance training 1 (EX1), 2 (EX2), or 3 (EX3) days per week for 24 weeks or to a control group (CO). SETTING: An exercise facility at an academic medical center. SUBJECTS: Forty-six community-dwelling healthy men (n = 29) and women (n = 17) aged 65 to 79 years. INTERVENTION: Progressive resistance training consisting of three sets of eight exercises targeting major muscle groups of the upper and lower body, at 80% of one-repetition maximum (1-RM) for eight repetitions, either 1, 2, or 3 days per week. MEASURES: Dynamic muscle strength (1-RM) using isotonic equipment every 4 weeks, bone mineral density and body composition by dual energy X-ray absorptiometry (DXA), and neuromuscular performance by timed chair rise and 6-meter backward tandem walk. RESULTS: For each of the eight exercises, muscle strength increased in the exercise groups relative to CO (P < .01), with no difference among EX1, EX2 and EX3 groups at any measurement interval. Percent change averaged 3.9 +/- 2.4 (CO), 37.0 +/- 15.2 (EX1), 41.9 +/- 18.2 (EX2), and 39.7 +/- 9.8 (EX3). The time to rise successfully from the chair 5 times decreased significantly (P < .01) at 24 weeks, whereas improvement in the 6-meter backward tandem walk approached significance (P = .10) in the three exercise groups compared with CO. Changes in chair rise ability were correlated to percent changes in quadriceps strength (r = -0.40, P < .01) and lean mass (r = -0.40, P < .01). CONCLUSIONS: A program of once or twice weekly resistance exercise achieves muscle strength gains similar to 3 days per week training in older adults and is associated with improved neuromuscular performance. Such improvement could potentially reduce the risk of falls and fracture in older adults.

Once-weekly resistance exercise improves muscle strength and neuromuscular performance in older adults. Publishing Authors By Initials

For similar psychological phenomena and processes: psychomotor performance research abstracts see: psychological phenomena and processes: psychomotor performance research

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Once-weekly resistance exercise improves muscle strength and neuromuscular performance in older adults. Journal Published:

PUBLICATION TYPE: Randomized Controlled Trial

Journal: Journal of the American Geriatrics Society

VOLUME: 47

Page Numbers: 1208-14

Journal Abbreviation: J Am Geriatr Soc

ISSN: 0002-8614

DAY: 10

MONTH: Oct

YEAR: 1999

Once-weekly resistance exercise improves muscle strength and neuromuscular performance in older adults. Information

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LANGUAGE: eng

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Once-weekly resistance exercise improves muscle strength and neuromuscular performance in older adults. Keywords Mesh Terms:

KEYWORDS: Psychomotor Performance

MESH TERMS: physiology

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Grant and Affiliation Information for Once-weekly resistance exercise improves muscle strength and neuromuscular performance in older adults.

AFFILIATION: Geriatric Research, Education and Clinical Center, Veterans Affairs Medical Center, Palo Alto, California, USA.

Country: UNITED STATES

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MEDLINETA: J Am Geriatr Soc

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