If you haven't already, you'll be sporting a bikini soon, so you'll want to maintain a strong, sculpted tummy, and three minutes is all it takes. Here are three effective moves to tone your lower, middle, and upper abs that make for a perfect post-cardio core workout. For even more of a burn, repeat this circuit two or three times.
Lying Bent-Knee Leg Extension
Keep the lower back planted on the floor as you slowly alternate lowering each heel to the floor for one minute.
Roll-Up Crunch and Punch
Repeat as many punches as you can for one minute.
Plank With Alternating Leg Lift
Hold your torso parallel with the ground, and keep the core strong as you slowly alternate lifting each leg for an entire minute.