1. Be patient: Although you might not resume where you have left off, you should be patient enough to avoid the risk of injury.
2. Don’t go all-out: Setting short-term goals with each and every workout, instead of going all-out, will put you firmly on the path to where you were. Don’t try to get in shape faster as it will backfire!
3. Combine weights and cardio: Slowly build back up targeting both the aerobic component with cardio and the strength component with weight training.
4. Stretch it out: Spend a little more time concentrating on flexibility by incorporating a solid warm-up and cool-down period to make your comeback safer, more effective and enjoyable.

SBS