Implementing a simple exercise plan during chemotherapy may ease cognitive impairment and fatigue, promoting better health outcomes for cancer patients.

At age 70, Alfred Roberts plays hockey twice a week. Nothing special, right? Except that for three years he has had advanced prostate cancer, which has spread to his bones. "I've always been active.

Exercise is well known to bring health benefits. But it has now been found to cut deaths from cancer even when people get fit after their diagnosis – and it can have as much benefit as chemotherapy.

Recognising these subtle body changes can lead to an earlier diagnosis, when treatment is more likely to be successful ...