Significant hypertension defined as a systolic BP > 170 mmHg
and/or diastolic BP > 95 mmHg
Evidence of recent, regular moderate physical activity
(PAL of 1.6–1.7) [22]
Any other disease likely to affect the ability to exercise including
arthritis and respiratory disease
Normal resting 12-lead ECG
Any cardiorespiratory drugs other than thiazide diuretics, aspirin,
ACE-inhibitors, and statins
No significant ECG changes or chest pain during a Bruce
protocol exercise ECG to stage III with a normal physiological
response to exercise
Secondary complications: any diabetic retinopathy other
than mild background retinopathy, nephropathy
(proteinuria on >1 occasion or raised creatinine), and sensory neuropathy