Bored of planks and crunches ... these 5 dumbbell ab exercises — according to a personal trainer Lie on the ground with your legs outstretched and hold the dumbbell in both hands with your ...

"[Do it] like a bull pawing the ground before he charges ... Yes, if the locking mechanism is broken on your plank, replacing it with matching laminate flooring may be the only permanent fix.

But for a deeper (and arguably more useful) burn, try taking the plank into a low position. When your forearms are planted on the ground, your abdominals are challenged even more than in a high ...