The guidelines agree on the kind of exerciseStrong evidence
The international Duchenne care standards, the American Academy of Neurology's limb-girdle and FSHD guidelines, the myotonic dystrophy consensus and Muscular Dystrophy UK all advise regular moderate, low-impact aerobic exercise and light strength work, and say avoid heavy, high-resistance or exhausting exercise. The Duchenne standards also say avoid eccentric exercise.
Sources 4, 2, 5, 9, 1
Aerobic exercise is the best supportedEmerging evidence
A Cochrane review of 14 trials (428 people with muscle diseases) found aerobic training may improve fitness in FSHD, with low certainty. In FSHD trials, cycling 3 times a week for 16 weeks eased severe fatigue (57 people), and 12 weeks improved fitness by 10% and walking speed by 7% without signs of muscle damage (41 people). In 11 men with Becker, 12 weeks of cycling raised fitness by 47% with no sign of muscle damage, but there was no comparison group.
Sources 3, 18, 19, 20, 21
Strength training: safe, with small gainsMixed evidence
In the Cochrane review, strength training made little or no difference to strength in FSHD and myotonic dystrophy, with low to very low certainty, and caused no harm beyond soreness. Small studies in limb-girdle, Becker and myotonic dystrophy found some strength gains with light to moderate training; one person stopped heavier training because of soreness.
Sources 3, 22, 23
Holds and moderate cardio in Duchenne and BeckerEmerging evidence
With your neuromuscular team's agreement, and once your team has checked your heart, these look safe in small studies. In 30 boys with Duchenne, assisted arm and leg cycling for 15 minutes, 5 days a week for 24 weeks, kept their motor function steady while it declined without training; in 8 boys, a home programme of leg holds caused no muscle damage. A review of 12 studies (282 people) found training improved strength and endurance, with very low certainty, and a small trial of added aerobic training improved motor function and walking distance. A 2026 expert meeting agreed that moderate isometric holds and low-intensity or assisted cycling are reasonable, and a US booklet gives the same advice for Becker. The studies are tiny, so this rests on expert agreement more than proof.
Sources 7, 8, 24, 3, 25, 26, 27, 6
Swimming and water exerciseEmerging evidence
The Duchenne care standards highly recommend swimming from the early walking years into adulthood. In a UK pilot trial of 12 boys with Duchenne, adding 30 minutes of water therapy twice a week for 6 months was well received and motor scores fell less (by 2.8 points, against 5.5 without it), but the comparison group was tiny and a full trial wasn't feasible.
Sources 4, 28
Myotonic dystrophyEmerging evidence
In 11 men, 12 weeks of leg strength training improved strength and function, with benefits still there 9 months later. In a trial of 255 adults with severe fatigue, cognitive behavioural therapy (CBT), with optional graded exercise, improved activity a little. The consensus encourages moderate aerobic and strength exercise.
Sources 23, 17, 9
Overwork weakness: possible, but rarely testedMixed evidence
The worry comes from older reports of weakness getting worse after exercise and from mouse experiments with lowering exercises. In supervised trials of moderate cycling in Becker and FSHD, blood markers of muscle damage (creatine kinase) and muscle samples didn't worsen. In Charcot-Marie-Tooth disease, a related inherited nerve condition, one study of 271 people found no sign of overwork weakness and another of 60 found some in the hands.
Sources 3, 7, 21, 29, 20, 30, 31
Stretching on its own does littleMixed evidence
Across 49 studies (2,135 people), stretching for up to 7 months made no worthwhile difference to how far joints move in people with neurological conditions. In neuromuscular disease, night splints and early surgery didn't keep ankle movement either. The care standards still use stretching, with splints, standing and positioning, to slow tight joints.
Sources 32, 33, 4
Medicines and other care carry the evidenceStrong evidence
In Duchenne, steroids and other medicines slow the disease, and heart medicines, breathing support and spine surgery protect health. Exercise is for fitness, function, mood and fatigue alongside them, not instead.
Sources 13, 4, 8