This simple floor exercise activates your deepest abdominal muscles, protects your spine, and upgrades your strength routine in just minutes a day.

Chair core exercises after 60: Trainer-approved moves to build core strength without floor planks, crunches, or back strain.

Add Yahoo as a preferred source to see more of our stories on Google. Fitness writer Alice Porter does a crunch-like exercise in her living room. I often assume that a workout is only effective if it ...

Here's the ab exercise to add to your routine.

Want to run better? Stop doing sit-ups – here are five expert-recommended functional core movements to do instead.