Kill two birds with one stone (dumbbell) in as little as 15 minutes using this trainer's abs and arms strength building workout.

They’re often lumped together as “ab exercises,” but crunches and situps aren’t the same thing — and choosing the right one can impact your results (and your spine). So, if your goal is stronger abs, ...

“The Stairmaster requires more stabilisation because of the vertical climbing motion,” explains personal trainer Aimee Victoria Long. “This means that the abs are activated more consistently than in ...