Want to work out with the trainer who keeps the Sports Illustrated models in tip-top shape? Then Justin Gelband is your man. Dubbed "the model whisperer," Justin has prepped many models — including the Victoria's Secret Angels, along with the swimsuit models for the iconic annual issue of SI — for the runway and major photo shoots. Learn his fitness philosophy while toning your abs and butt with this 10-minute workout. You don't need any equipment for this sweat session, so no excuses! Press play and get ready to tone.
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