If your weekly schedule looks like a jigsaw puzzle, squeezing in both cardio and strength training can be tough. Instead of ...

Make it harder: Use a heavier weight, increase the speed (power), or hold the end position for 2 seconds before returning.

Ditch sit-ups. These 6 standing core moves firm your abs, boost balance, and help trim belly overhang after 45.

While classic core exercises like sit-ups and crunches are certainly an effective way to train your abs, they are not the only way. If you prefer to stay standing for your workouts, then this ...