ACE Insights Blog

These cannonball-shaped iron orbs with handles lifted in a swinging motion were developed by Russian strongmen in the early 1700s as a way to build strength, balance, flexibility and endurance quickly.

In recent years, a host of infomercial products and exercise videos have preyed on people’s desire for a toned mid-section. But what is the best, most efficient route to tighter abs? We look at 13 of the most common ab exercises, ranking them from best to worst.