2. Straight Leg Lifts
This workout will engage your lower body which will put more challenge on the abdominal muscles.
The more work your muscles have to do, the more calories you will burn.
How to do it
- Get into to the starting position as shown in the image below.
- Slowly raise your right leg up to your chest height and hold for 1 second.
- After the 1 second pause return to the starting position and do the left leg.
- During the pause make sure to tighten your core muscles.