Congratulations on having undergone the breast augmentation procedure. Your plastic surgeon will be your best resource when it comes to returning to specific activities. He/she will know exactly what was done, how you are progressing, and exactly what type of activities you are returning to. Having said that, depending on how you define "mild hiking", you should be fine at this point.Generally, I suggest patients gradually ease back into the strenuous aerobic exercise 4 to 6 weeks postoperatively, assuming that they are doing well and there have been no complications. Lower body exercise can generally be resumed 2 weeks postoperatively. Use common sense, listen to your body, and gradually resume previous activity. In my practice, I ask patients to avoid contact and strenuous exercise involving the pectoralis major muscles ( such as push-ups, bench press, burpees, dancing on a pole…) for at least 3-6 months. Generally speaking, it will be important for you to return to activities in a very gradual/cautious fashion. Again, "listen to your body" as you do so. Best wishes for an outcome that you will be very pleased with.