CEO Jeff Byers is a former NFL athlete and said he fits exercise into his busy schedule by rucking during meetings and calls.Courtesy of MomentousMomentous CEO Jeff Byers pivoted from being a football player to running a supplement company.Byers takes his meetings and calls while walking either outside or at a treadmill desk.He said rucking, carrying weight while walking, is an efficient way to stay in shape on a busy schedule.Over a decade ago, Jeff Byers was a full-time athlete, trying to optimize his body and mind to compete in the NFL.Now, as the CEO of a buzzy supplement company, Momentous, Byers still makes time to exercise like an athlete using a time-saving fitness technique that helps him fit workouts into his routine of meetings and phone calls.Byers told Business Insider that he spends hours each week rucking, walking with a weighted pack or vest.Rucking is one of the hottest trends in fitness, beloved by celebrities like Guy Fieri as well as top athletes, in part because it combines a minimalist approach of working out anywhere, anytime with functional benefits like building muscle, burning fat, and boosting longevity.Taking calls from his treadmill desk, Byers said he's able to log miles and hours of exercise without spending extra time in the gym."I love to ruck," he said.