Aerobic, resistance and combined exercise training for patients with amyotrophic lateral sclerosis: a systematic review and meta-analysis.

For people living with amyotrophic lateral sclerosis (ALS), a progressive neurological disease, there has long been uncertainty about whether structured exercise helps or could even cause harm given the disease's relentless course. This review pooled data from trials testing aerobic, resistance, and combined exercise training against comparison conditions, looking at outcomes like day-to-day function, breathing, fatigue, pain, quality of life, strength, and fitness. Across 16 included studies, with 8 randomized trials contributing to the pooled analysis, exercise showed a statistically significant advantage for functional ability, quality of life, and peak oxygen uptake. But when the authors removed trials judged to be at high risk of bias, these differences were no longer statistically significant, and no significant differences emerged for respiratory function, fatigue, pain, or strength.

The authors describe the overall evidence as generally poor quality, meaning the safety and effectiveness of exercise therapy in ALS remains genuinely unclear.

If you or someone you know has ALS, you may wonder whether exercise training could help maintain function or quality of life. This review looked at several studies testing aerobic, resistance, and combined exercise programs in people with ALS, comparing them to other conditions such as usual care, and measuring things like daily functioning, breathing, tiredness, pain, quality of life, and strength. When all the trial results were combined, exercise appeared linked to better functional ability, quality of life, and a fitness measure called peak oxygen uptake.

However, when the researchers excluded studies with the weakest methods, these advantages disappeared, meaning the positive results may partly reflect poor-quality trials rather than a reliable effect. No clear benefit was found for breathing, fatigue, pain, or strength in either arms or legs.

The bottom line is that the evidence so far does not clearly show whether exercise is helpful, and the authors themselves say more high-quality research with larger numbers of participants is needed before firmer conclusions can be drawn.

This is a summary of research, not medical advice. Talk to your own healthcare provider about anything affecting your care.

This review addresses whether exercise training, aerobic, resistance, or combined, offers measurable benefit for people with ALS, a question of ongoing clinical relevance given the disease's progressive nature. The review included 16 studies (532 patients), with 8 randomized controlled trials contributing to meta-analysis.

Pooled results favored exercise for functional ability, quality of life, and peak oxygen uptake (Vo2peak), each statistically significant. However, after excluding high-risk-of-bias trials in sensitivity analysis, none of these three outcomes remained statistically significant, and no significant differences were detected for respiratory function, fatigue, pain, or upper- or lower-body strength. This pattern sharpens clinical reasoning: it suggests the headline positive findings are driven substantially by lower-quality trials, so framing exercise as an established functional or quality-of-life intervention in ALS would outpace the evidence.

The main limitation is the generally poor methodological quality and risk of bias across included trials, which the authors themselves flag as the reason safety and effectiveness remain unclear pending larger, higher-quality randomized trials.