A breakout was needed, and at Anzio the Americans were looking for ways to decisively attack and overcome Axis resistance. One solution: sleds. Battle sleds. Brig. Gen. John W. O’Daniel ...

The pushing motion engages these muscles concentrically (when they shorten, i.e. when you bend your legs) to generate force against the resistance of the sled. 'Over time, this helps increase ...

Resistance sprints are pretty much what they sound like: short bursts of fast running performed with added load. That load can come in various forms, including a sled that you push, or a sandbag ...