レッドブル

10 awesome exercises for building a killer core

The rumours are true: developing the rectus abdominis muscle (the technical name for the six-pack) can play a part in effective core training. But having washboard abs isn’t the be-all and end-all ...
レッドブル

10 awesome exercises for building a killer core

The rumours are true: developing the rectus abdominis muscle (the technical name for the six-pack) can play a part in effective core training. But having washboard abs isn’t the be-all and end-all ...