I do it for 40 minutes a day 5 days a week. The schedule is
Alternate Days
50 slanting bench press with 30 kg weight
Lift 50 kg weight - (15 reps)
2 sets of 50 reps for Biceps
2 sets of 25 reps wrist twist
2 sets of 10 push ups
Taichi- Basic 8 , 5 reps
Tuesday & Thursday
Cycling 10 kms or Brisk walk for 7 kms.
Occasional swimming
It does not matter how slowly you go so long as you do not stop.
Confucious