While I don't actively avoid the humble sit-up when training my midsection, I do get excited when I find an ab circuit that's free of them, like this 15-minute session from trainer James Stirling. It ...

Fortunately, you can get a good workout without leaving the comfort of your own home. You can even do cardio without disturbing ... up muscles all over the body and burn calories in just 15 ...

“We are doing 10 minutes of cardio at home with zero equipment,” the fitness instructor explains ... each exercise is organized into 45 seconds of work, followed by 15 seconds of rest. But don’t be ...