Hicks: You’re working your core strength, but at the same time putting the hamstring in a pre-stretched position.
Lie with back on ground, legs straight up
Keeping arms straight, crunch up until fingertips touch toes
Lower with control; repeat for specified reps
Sets/Reps: 1x20, 35-45 sec. rest
Coaching points: Keep legs as straight as possible and toes flexed // Legs should form 90-degree angle to ground // Keep back flat and head in neutral position // Avoid using body for momentum