Single arm side lunges
Strengthen your abs and waist and improve your posture with these flowing Essentrics trademark lunges.
Place legs in a wide stance with feet slightly turned out. Raise the left arm reaching as high as possible towards the ceiling, bend your right knee into a lunge position, keeping your arm close to your ear and as straight as possible. Once you've reached to your maximum, pull the arm in while lunging to the other side and bringing the elbow towards the knee. Repeat 8 times, then change sides.
Tip: Make sure to keep the arm beside the body, never in front. This will help tone your waist.
When you pull the elbow towards the knee, imagine you're pulling a heavy rope to create resistance in your muscles.