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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