Number of crunches experts say you should be able to do for your age
READ MORE: Fitness experts reveal the best time of the day to go to the gym Crunches are the ab exercise you need to add into your regular workout to improve your core strength, a fitness trainer suggests. Joseph David, a New York City based trainer, claims that core work is important to be able to 'stand tall and walk with confidence and purpose'. 'Your core is the base of everything, and the No. 1 thing you have to be able to do is pick yourself up, mentally and physically - so it starts with core. Any movement is good movement.' The best way to build core strength is by doing crunches , the certified coach says. Similarly to sit-ups, this popular abdominal exercise involves laying on your back with your knees bent and hands placed on either side of the body or behind your head. Once you are in position, lift your head and shoulders off the ground before releasing and and resting your head back on the ground Crunches ar...