I've designed this 30-day abs challenge to ensure you never get bored ... ceiling at hip height (foot flexed), left leg bent at 90 degrees, and right hand pushing into top of left knee.
Find out how doing 30 reverse crunches with leg lifts daily for a week can transform your abs and boost your core strength.
The possibility of the ABS challenge system making its way to MLB really began picking up steam this past June as it was fully implemented for the remainder of the Triple-A season. It’s similar ...