We do lots experiments on our hair to make it healthy and strong, but never do the simplest thing which is exercise. Workout is not good for body but also do well for your hair. The best exercise for hair growth is cardio since the intense workout increase the production of sebum, this coats each strands of hair and prevent drying of the scalp and mane. It will also help you to get rid of the toxins from body.
Hanging upside down may also increase the hair production. Backbends or inverted poses help to increase blood supply to the scalp. It definitely reduces hair loss.