Evidence Explorer · MS-N248 · Exercise and rehabilitation · strength, function, sleep and quality of life · Appraised November 5, 2026
In adolescent leukemia or lymphoma survivors, 16 weeks of high-load progressive strength training did not improve the primary isometric-strength endpoint more than low-load circuit training, though it favored leg-press strength, physical function and sleep/rest domains.
Evidence at a glance
- Benefit signal: No advantage for the primary endpoint; selective secondary gains in leg-press strength, physical function and sleep/rest.
- Certainty: Low. The trial was small, used an active comparator and reported multiple secondary outcomes.
- Risk context: Progressive high-load training needs technique supervision and review of bone, joint, cardiac and neurologic late effects.
- Cancer-control relevance: No evidence about relapse, recurrence or survival.
What was studied
Forty-six survivors aged 10 to 19 years were randomized 1:1 to 16 weeks of high-load progressive strength training (STEEL) or low-load circuit training.
The primary outcome was maximal voluntary isometric contraction; secondary outcomes included one-repetition-maximum leg press and quality-of-life domains.
What the study found
The primary isometric-strength outcome did not differ between groups; both groups improved. High-load training increased leg-press one-repetition maximum by 9.9 kg more (95% CI 0.7 to 19.1; p=0.036).
Physical function favored high-load training by 7.4 points (95% CI 0.7 to 14.0; p=0.03) and sleep/rest by 11.4 points (95% CI 3.1 to 19.6; p=0.007). Other quality-of-life domains did not differ.
What this does not establish
Secondary outcomes can be vulnerable to chance when many comparisons are made. With no non-exercise control, the study cannot show whether either program was better than usual activity, and it cannot establish durability.
Safety and practical context
A pediatric or adolescent cancer-rehabilitation team should review avascular-necrosis risk, bone density, neuropathy, cardiac exposure and current pain before high-load progression.
The accessible abstract did not provide a complete adverse-event account. Technique, gradual loading and age-appropriate supervision are essential.
Questions for the care team
- Are prior steroid, radiation or chemotherapy effects relevant to heavy loading?
- What supervision and equipment are available?
- Would a lower-load program be more practical while still improving function?
Sources and identifiers
Funding and conflicts: Not fully verified from the accessible abstract.
Source access and dates: Primary abstract was appraised; complete adverse-event and funding disclosures were not independently verified. Sources checked November 5, 2026. Last literature search November 5, 2026.
Educational evidence summary, not individualized medical advice. Exercise around cancer treatment should be adapted to symptoms, blood counts, bone health, cardiopulmonary status, surgical restrictions and the treating team’s guidance.
