3.Push-Ups
Get into a “plank” position on the floor or mat, feet together with toes tucked under, hands planted flat below your shoulders. Slowly bend your elbows and lower your body toward the floor, as far down as you can go keeping back and hips level. Then press back up and repeat for 30 seconds. You can make this easier by resting your weight on your knees instead of your feet. To boost intensity, try resting your feet on a low bench or step instead of the floor.
4.Ab Crunch
Start with a basic crunch: Lie flat on your back, with your knees bent and feet on floor. Tighten your core. Press your lower back into the mat and reach toward top of knees. Return to starting position but keep core tight and repeat for 30 seconds.
