Weeks 3 and 4: Saturday

Warmup

Do a set of each move below, but at a lower intensity.

This ab workout is more challenging than the last, but you'll still finish up in under 15 minutes to enjoy the rest of your weekend.

Lateral plank walk: Walk your body back and forth for 30 seconds; repeat three times.
Reverse crunch: Do three sets of 12 reps.
T-cross sit-up: Do three sets of 12 reps.
Plank with alternating reach: Do three sets of 12 reps on each side.

Three to five minutes of static stretching and breathing exercises.