Fitness Motivation :
Description
This is a very hard, core routine.. It doesn't look like much, but if you hold it for a few minutes at a time, your lower back will become very strong! Tony Horton calls this Superman.
This is a very hard, core routine.. It doesn't look like much, but if you hold it for a few minutes at a time, your lower back will become very strong! Tony Horton calls this Superman.
