What do systematic reviews say?

acceptability and safety of treadmill training ‐ Active control group (co‐interventions were similar in both groups) Number of adverse events and drop‐outs · people with Parkinson's disease

acceptability and safety of treadmill training ‐ No intervention control group (co‐interventions were not similar in both groups) Number of adverse events and drop‐outs · people with Parkinson's disease

Activity Gait speed · people with Parkinson's disease

walking distance in m (at the end of study; all studies) ‐ Active control group (co‐interventions were similar in both groups) Measures of timed gait. Scale from: 0 to inf. · people with Parkinson's disease

Change in peak work capacity · patients with chronic obstructive pulmonary disease

Exercise endurance Duration of constant work rate exercise test on treadmill · patients with chronic obstructive pulmonary disease

Dyspnoea during treadmill walking Borg scale at isotime during constant work rate treadmill test Scale ranges from 0 to 10, with lower scores indicating less shortness of breath · patients with chronic obstructive pulmonary disease

Dropouts ‐ by end of treatment Numbers of dropouts and adverse events · adults who had suffered a stroke and exhibited an abnormal gait pattern

Walking speed (m/s) at end of treatment timed measures of gait · adults who had suffered a stroke and exhibited an abnormal gait pattern

Activity Gait speed · adults who had suffered a stroke and exhibited an abnormal gait pattern

Walking endurance · adults who had suffered a stroke and exhibited an abnormal gait pattern

Walking endurance (m) at end of treatment ‐ dependent in walking at start of treatment timed measures of gait · adults who had suffered a stroke and exhibited an abnormal gait pattern

Walking endurance (m) at end of treatment ‐ independent in walking at start of treatment timed measures of gait · adults who had suffered a stroke and exhibited an abnormal gait pattern