Sit on the edge of the chair and lean forward and grab hold of your left foot with your righ hand. Without arching your back, bring your belly towards your thighs. You should feel the tension on the back of your left leg. Keep the stretch for about 10 seconds and repeat a couple of times before switching leg.
HOW: You can do this exercise both as a static or dynamic workout. Most effective is the dynamic motion which requires both strength and coordination; Lean forward on a chair with wheels and assume the plank position, lower arms resting firmly on the cushion and upper arms in vertical position. Let the chair roll forward away from you as far as you can manage and then pull it back towards you again. Repeat! It’s a very effective workout and you will instantly feel your abs getting a full rundown.
It’s easier as a static workout. Then you just lean forward in a plank position and hold for as long as you can. You can also do this on a chair without wheels.
HOW: Make fists and place your hands in between your legs. Squeeze your legs together hard for about 15 seconds. Relax & and do a couple of more sets.
You can also do this with just one hand or using a book, bag or similar. The key is that you need to create a small space between your legs.
You might risk looking a bit tensed, but who cares!