Snow has melted out or is melting out, and it may be time to sharpen the rollerski ferrules. For those looking for ski-specific workouts, the go-to is often rollerskiing. It goes without saying that the poles, rollerskis, bindings, and boots should all be checked before heading out. The safety gear should include some hi-vis items. And it should literally be topped off with a bicycle helmet. That’s where the engineers at Virginia Tech (VT) come...