You can do it anywhere, you don’t need any equipment and it only takes a minute (literally). The longer you can hold a plank, the stronger your core will become and you will quickly see an improvement. Do not attempt the plank if you have suffered any lower back problems.
Make sure you breathe throughout the exercise and if you purse the lips and breathe out slowly you will find that you can tense your abs even more.
Start on elbows and knees, locking hands together. Straighten legs and raise your body so that you’re supported by the balls of your feet, with feet hip-distance apart. Only your forearms and toes should be in contact with the ground. It’s like being in a press up position, and resting on your forearms. Face the floor, being careful not to arch your back or stick your bottom in the air. Your back must remain straight, where the ankle joint, knee joint, hip joint and shoulders should all be in a straight line. Hold this position for 30 seconds to a minute to begin with, extending the time as you get stronger. To end the exercise just simply place your knees down, and rest.