Systolic blood pressure rise over 250 mmHg, diastolic over 120 mmHg

Decrease in systolic blood pressure by more than 10 mmHg or unchanged in spite of loading

Angina pectoris

2 mm horizontal decrease or down-sloping ST segment in the exercise ECG

Rise in number of the ventricular premature beats (over 30% of the QRS complexes)

R on T premature ventricular beats

Sudden fall in heart rate in spite of loading

Sustained supraventricular tachycardia

Second or third degree atrio-ventricular block

Subject confused, poor co-operation or movement co-ordination

Subject’s pallor, bluish skin, nausea

Severe pain in musculoskeletal system

Subject refuses to continue the exercise