The first step to any workout routine is to evaluate how fit you are for your chosen physical activity. Whenever you begin an exercise program, it's wise to consult a doctor. Anyone with major health risks, males aged 45 and older, and women aged 55 and older should get medical clearance, says Cedric Bryant, PhD, chief exercise physiologist for the American Council on Exercise.
The MCT group was prescribed two weekly exercise sessions of 50-min continuous activity at 70% of peak heart rate, or approximately 13 on the Borg 6–20 rating of perceived exertion (RPE) scale . The HIIT group was prescribed two exercise sessions a week with 10-min warm-up followed by 4 × 4 min intervals at 85–95% of peak heart rate, or approximately 16 on the Borg 6–20 RPE scale. The participants were given individual oral and written information about the training methods, including information about frequency, duration, intensity and examples of exercise sessions. The participants were free to exercise individually, with an exercise type and at a location of their own choosing. Every sixth week the participants met for a supervised spinning session where they exercised with a heart rate monitor. These exercise sessions gave the participants an opportunity to control their intensity during exercise. In addition, organized group exercise was offered twice per week for motivational purposes. Attendance to these exercises was voluntary and the activity performed varied between indoor and outdoor activities such as walking, jogging and aerobics . Besides the two prescribed exercise sessions, the participants were free to exercise as desired.