高齢者は1日4分のレジスタンストレーニングで体力を4倍向上できる可能性 (Four Minutes of Daily Resistance Training Can Quadruple Fitness in Older Adults)

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2026-06-09 ペンシルベニア州立大学(Penn State)

米国の Pennsylvania State University の研究チームは、高齢者において1日わずか4分間のレジスタンストレーニング(筋力トレーニング)が、身体機能や筋力の大幅な向上につながる可能性を示した。研究では、高齢者が短時間で実施できる高負荷の筋力運動プログラムを継続した結果、筋力、バランス能力、日常生活動作に関わる身体機能が顕著に改善した。特に運動習慣の少ない高齢者では効果が大きく、従来より長時間の運動が必要と考えられていた身体機能改善が、短時間でも達成できることが示された。研究者らは、時間的制約や体力的負担を理由に運動を避けていた高齢者にとって実践しやすい方法であり、健康寿命の延伸や転倒予防、要介護リスク低減に役立つ可能性があると指摘している。成果は、高齢化社会における効率的な運動介入プログラムの開発に重要な知見を提供する。

<関連情報>

Brief daily functional strength training to improve functional performance in older adults with mobility disability: A randomized trial

Smita Dandekar,Jordan Kurth,Yimeng Shang,Jonathan G. Stine,Matthew A. Ladwig,David E. Conroy,Kathryn H. Schmitz,Liza S. Rovniak,Matthew Silvis,Margaret Danilovich,Noel Ballentine,Natalia Pierwola-Gawin,Shouhao Zhou,Christopher Sciamanna
PLOS One  Published: March 12, 2026
DOI:https://doi.org/10.1371/journal.pone.0336748

高齢者は1日4分のレジスタンストレーニングで体力を4倍向上できる可能性 (Four Minutes of Daily Resistance Training Can Quadruple Fitness in Older Adults)

Abstract

Objectives

Mobility disability is associated with functional decline in older adults. Resistance training (RT) improves mobility disability, but adherence to national RT guidelines is poor. We evaluated the effects of a 12-week brief, home-based functional RT program, FAST (Functional Activity Strength Training)-2, on adherence and functional impairment in older, inactive adults ≥ 65 years of age, with pre-existing walking difficulty.

Methods

Eligible older adults were randomized using stratified assignment based on biological sex and age (65−72 and 73+) to either the FAST-2 intervention involving a 4-minute daily workout of four exercises lasting 30 seconds each or the delayed treatment control condition. Video coaching at baseline and at weeks 2, 4 and 8, provided feedback on exercise form, modifications and progression. Daily email reminders were sent for workout completion, and to report exercise performance and rate perceived exertion. Performance and adherence feedback were emailed biweekly. Functional performance was measured by video using the Five-Times Sit-to-Stand (FTSTS) test, One-Legged Stance Test (OLST) and the 30-second chair stand test at baseline and at weeks 6 and 12.

Results

Ninety-seven participants were randomized to either the FAST-2 treatment intervention (n = 44) or the delayed treatment control condition (n = 53). The linear mixed-effect model showed the intervention group decreased the FTSTS by 2.3 seconds (95% CI: 0.5–4.1, p = 0.01), increased OLST by 3.6 seconds (95% CI: 0.6–6.5, p = 0.02) and increased the number of chair stands by 4.2 repetitions (95% CI: 2.8–5.7, p < 0.001) more than the control group over 12 weeks. Intervention participants completed the workout 81% of the days. No significant adverse events were reported.

Conclusion

The 12-week FAST-2 intervention, including only 60-seconds of lower extremity exercises in older individuals with pre-existing walking difficulty, yielded improvement in functional performance.

Trial registration

ClinicalTrials.gov: ID NCT05697497

Study Details | NCT05697497 | Functional Activity Strength Training | ClinicalTrials.gov

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