WEEK 39 WORKOUT 4
KILLER CORE
Side plank crunches x 10 per side
Bicycles x 24 total or 12 per side
Squat to oblique twist x 24 total or 12 per side
Unilateral core stability x 20 total or 10 per side
Mountain climbers x 30 or 15 per side
Plank jack to side plank x 10 per side
Repeat as many times as needed, option to add 20 minutes cardio of choice