This ballistic hamstring flexibility method was a monthly intensive but can be used at any point for those looking for a flexibility boost in 28 days. This is best done as a short intensive periodically, not a regular in your training.
This ballistic hamstring flexibility method was a monthly intensive but can be used at any point for those looking for a flexibility boost in 28 days. This is best done as a short intensive periodically, not a regular in your training.