With snowy mountains in the horizon and the days down to the single digits before I’m waking up to stride-and-glide most every morning, my power training has been changing with the season. And while Mr. Hazle or Karl Erickson or Mustafa might call into question my defining this as “power,” the time has come for me as a more endurance-oriented athlete to turn gains in the squat and clean into something I can use in the ski tracks. If you got a minute, check it out …