A fitness trainer shared how many crunches people should be able to do according to their age. Here's what to know about the ...

bend at your waist to touch your left elbow towards your knee. Move slowly and with control. Pause in the crunch, before slowly returning to your starting position. The key with standing oblique ...

The trainer suggests starting with easier versions like partial crunches (lifting the shoulders a little off the ground) or bent-knee crunches, which are easier on the back. "Start with just a few ...