Lifting beats vibration plates for ageing muscles

Sarcopenia — the loss of muscle strength and physical function that can come with age — leaves older people slower, weaker and more vulnerable to loss of independence. Exercise is the standard countermeasure, but the options on offer differ enormously in effort and appeal, from conventional resistance training to mixed programmes and whole-body vibration platforms, which are often marketed as a low-effort alternative. Which of these modes actually restores strength and everyday physical performance is a practical question for anyone choosing where to spend their training time. This review set out to compare them directly.

The authors searched six electronic databases, including PubMed, the Cochrane Library, Embase, Web of Science, CNKI and Wanfang, for studies published from January 2010 to March 2021. Twenty-six studies were included — 25 randomised controlled trials and one non-randomised controlled trial — covering 1,191 older people with sarcopenia, with mean ages ranging from 60.6 to 89.5 years. Two researchers independently extracted and evaluated studies. Outcomes were knee-extension strength, Timed Up and Go, gait speed and the chair stand, pooled as standardised mean differences using fixed-effect models.

Compared with control, resistance training significantly improved knee-extension strength (SMD 1.36) and gait speed (SMD 2.01), and mixed training also improved both (SMD 0.62 and 0.69 respectively). Whole-body vibration training showed no significant change in knee-extension strength (SMD 0.65, 95% CI -0.02 to 1.31) or gait speed (SMD 0.12, 95% CI -0.15 to 0.39). Timed Up and Go times improved with all three modes (SMD -0.66). Chair-stand times did not improve with any training mode (SMD 0.11), and heterogeneity was substantial in several of the pooled analyses.

The findings reinforce resistance training as the cornerstone intervention for age-related muscle decline, with mixed programmes a reasonable alternative. They complicate the case for vibration platforms, which delivered no significant gains in strength or gait speed here despite their appeal as a passive option. The consistently null chair-stand result across all modes is an open question, as is the high statistical heterogeneity, which means programmes varied considerably between trials. Optimal dose, intensity and programme design for this population remain to be pinned down.

For anyone thinking about muscle loss with age — their own or a parent's — this is a reason to think that actively loading the muscles is what drives improvement, and that standing on a vibrating platform is not an equivalent shortcut. Walking speed and strength, two of the most meaningful markers of independence in later life, responded to resistance and mixed training in these trials. The evidence here is informational rather than a prescription, but it points clearly towards effortful training over passive alternatives.