King 1991.

Methods	Randomised, controlled, parallel group trial, unblinded
Participants	357 sedentary adults, free of cardiovascular disease (aged 50‐65 years)
Interventions	'High intensity' supervised exercise (60min predominantly aerobic, walking/jogging/cycling to 73‐88% max HR, 3 x wk) 'High intensity' home exercise (60min predominantly aerobic, walking/jogging/cycling to 73‐88% max HR, 3 x wk) 'Low intensity' home exercise (30min predominantly aerobic, walking/jogging/cycling to 60‐73% max HR, 5 x wk) and control (continued with 'usual' activity)
Outcomes	At one year treadmill performance was significantly improved in the three exercise groups. There was no difference in outcomes between the low and high intensity groups. Participation rates were significantly better for the home‐based exercise groups Blood lipid levels, weight and blood pressure were unchanged
Notes	General community in California, USA
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Low risk	A ‐ Adequate