Design: randomised controlled trial at a single academic outpatient centre (NCT07376213)
Population: 24 patients undergoing radiotherapy for head and neck cancer, 12 per arm
Primary outcome: swallowing quality of life, photogrammetric posture, digital goniometry for cervical mobility, and circumference measures for lymphoedema
Effect: swallowing quality of life maintained in the exercise group and deteriorated in controls (P < .001); cervical range preserved across all planes (P < .05); no between-group difference in facial oedema

Swallowing function, neck mobility and posture all deteriorate through head and neck radiotherapy, and rehabilitation usually starts once the damage is established. A randomised trial tested doing it the other way round: 24 patients were allocated to a home-based programme of swallowing, posture, range-of-motion and strengthening exercises delivered alongside radiotherapy, or to standard care.

Swallowing quality of life was maintained in the exercise group and deteriorated significantly in the controls (P < .001). Cervical range of motion was preserved across flexion, extension, rotation and lateral flexion (P < .05), with lateral tilt showing the clearest difference (P < .001). The safety question that stops many units offering this — whether exercising an irradiated neck worsens lymphoedema — was addressed directly: facial oedema measurements rose slightly in both groups with no difference between them. Adherence was reported as high.

Twelve patients per arm is very small, and outcomes like swallowing quality of life are self-reported in an unblinded trial where the intervention group knows they are doing something. So the effect size is not established. But the intervention is a home exercise sheet, the safety signal is reassuring on the specific concern that has held it back, and the alternative is starting rehabilitation after the fibrosis has set. On that balance it is worth offering while better evidence accumulates.

Offer a swallowing and neck mobility programme at the start of radiotherapy, not after it.
Include posture and cervical range of motion, not swallowing exercises alone.
Measure neck circumference at baseline so lymphoedema can be tracked rather than guessed at.
Give it as a written home protocol with a review point; adherence is what the trial depended on.
Record swallowing function formally before treatment starts, or later deterioration cannot be judged.

Why it matters

It puts rehabilitation before the injury rather than after it, and answers the lymphoedema objection that has kept it there.

The statistics, in plain English

With 12 patients per group, the P values tell you a difference was detected but say nothing reliable about how large it is — small trials that find significant results systematically overestimate the effect. The lymphoedema safety conclusion is the weaker inference: 'no significant inter-group difference' in 24 patients is very limited evidence of safety, because a trial this size could not detect anything but a large difference. The finding that controls deteriorated significantly while the exercise group did not is a within-group comparison, which is a weaker claim than a between-group difference.