Is 2-4 weeks enough?
The first four weeks are key importance to healing to recovery. Heavy Lifting cant cause problems for sure within the first 3 weeks and so we advise 4 weeks to be safe of limited training, especially heavy weights.
You may start to gym, heavy exercises and swimming 2 weeks after the FUE operation. Jogging, running, sauna, cycling etc don't give any harm after 2 weeks of operation