A comprehensive review of 21 randomized trials with over 8,400 participants found that structured exercise after cancer treatment is linked to longer survival and a reduced risk of recurrence, with the strongest benefits seen in early-stage cancers.

Exercisers had a 23% lower risk of death and a 17% lower chance of cancer recurrence compared with non-exercisers, and those who completed at least 70% of the program saw even greater benefits.

The international analysis indicates that integrating structured physical activity into cancer care can extend survival and lower mortality and recurrence beyond improvements in quality of life.

Experts warn against a one-size-fits-all approach and advocate baseline fitness testing and personalized targets to optimize benefits.

Combining aerobic and resistance training yielded positive outcomes, while resistance training alone showed no significant effect, suggesting different biological responses to exercise types.

Breast cancer was the most studied, followed by bowel and pancreatic cancers, with recommendations to tailor exercise to individual safety and capability in consultation with a doctor.

Safety considerations include managing potential cardiovascular effects of certain chemotherapies and adjusting intensity or environment to protect immune health and reduce injury risk.

The findings emphasize that even moderate activity, like walking, can be beneficial, underscoring the need for individual tailoring due to varying cancer journeys and barriers to activity.

Programs should be individualized and coordinated with the cancer care team, taking into account prior activity, treatments, cardiovascular health, side effects, and age.

Common aerobic activities include running, cycling, swimming, and dancing, while strength training encompasses weights, squats, lunges, pushups, situps, and pullups.

Possible mechanisms for benefits include improved immune response, better tumor perfusion, lower circulating sex hormones, increased glucose uptake by muscles, and enhanced DNA repair.

Higher adherence—70% or more to the exercise plan—produces greater benefits, with aerobic exercise showing particularly strong effects.