What can I say? I love the feeling of strengthening my muscles on a Megaformer machine, working them in 50 minutes worth of planks and lunges until my core, legs, and butt are shaking. It’s the only ...

What is an ab roller? An ab roller, or ab wheel, is an effective and efficient way to strengthen your core and tone the abdominal muscles by rolling yourself out into a plank and back. 'The ab roller ...