When one of the world’s fittest people laid down the gauntlet with an unexpectedly accessible workout challenge, I couldn’t ...

“You pick a really heavy exercise, then pair it with ... an established attribute for speedy sprint swimmers. I’ve tried contrast training before, and found it effective.

Trainer verdict: Swimming While running engages your biceps as you pump your arms, it’s fundamentally a lower-body and core ...

Swimming? Cycling? All of the above ... Venu 3 because it made it easy to quickly check my heart rate ... More mid-workout. Consider the ecosystem your smartphone or other connected devices ...