Do at least 30 minutes of moderate exercise daily. You may obtain more health benefits by engaging in more vigorous activities. This will help in preventing diseases.
But if you want to lose weight during adulthood, do 60 minutes of moderate to vigorous exercise each day.
To sustain the weight loss do around 60-90 minutes of moderate exercise every day. You may also do other exercises such as stretching, weight training etc.
For children, 60 minutes of exercise is suggested each day. For elderly population, mild to moderate exercise including walking and stretching will prevent age induced functional loss.
Weight training may enhance endurance and cause increased basal metabolic rate. This helps in utilization of calories and avoid fat accumulation.
Balance exercise may also be done to preserve the balance with increasing age.