This exercise is another great workout that not only works on the core abdominal muscles, but also the chest muscles. To avoid back pain, it’s important to keep the legs apart and not use dumbbells that are too heavy for you.
Step 1. Start in full plank position, weights directly under your shoulders, head facing downwards.
Step 2. Using a slow, controlled movement, lift one weight upwards to shoulder height. Rotate your body and look up at the weight as you do so.
Step 3. Using a slow, controlled movement, bring your arm back down to the floor and resume full plank position and repeat on alternate side.