No Weights? Grab a Backpack and Fire Up This Jess Sims Full-Body Strength Workout

View this post on Instagram A post shared by JESS SIMS (@jsimsfit) No dumbbells? Not a problem with this quick strength-training workout from Peloton trainer Jess Sims, which swaps in a full backpack for moves usually done with dumbbells or kettlebells. “I can’t help myself – once a teacher, always a teacher,” Sims wrote on…