The shin hug is a bodyweight exercise focused on the muscles of the core. It shares characteristics with V-ups and crunches, but finishes with the ribs touching the thighs. It can be performed for time or for reps as part of the ab-focused portion of any workout.
Activates and strengthens the abs, in particular the rectus abdominis or “six-pack” muscles
Strengthens the hip flexors in addition to abs
Simple way to progress sit-ups when they become easy to do for high reps