This is a great exercise to work the abdominal muscles!

Start by lying on the floor on your back. You can keep your arms to your sides, or you can place them under your butt (for me it keeps my head from lifting off of the ground when I raise and lower my legs). Lift your legs up until you create a 90 degree angle, and then lower them again. Repeat this for 10-15 reps.

These tricep exercises help strengthen and tone the backside of your arms. You can use wrist weights like I have in the video, or you can use dumbbells.

The heel touch and hamstring curl exercises involve the hamstrings as the primary muscle group and the glutes as the secondary muscle group.

For the heel touches, lay flat on your stomach and lift your legs off of the floor. While keeping your legs in the air, bring your heels together and repeat for 3 sets of 10 reps each. Give yourself 30 seconds rest inbetween sets.

For the hamstring curls, lay your legs back on the floor, and then lift your calves up and down. Repeat for 3 sets of 10 reps each, resting 30 seconds inbetween reps.