If you’re tired of the treadmill, step off that beaten belt and try a more stimulating endurance challenge — rowing workouts. "If you take the time to learn rowing technique, it’s one of the best exercises you can do for cardio,” says Jack Nunn, former member of the U.S. Under 23 National Team, US Rowing Masters 2013 Athlete of the Year and owner of Roworx, an indoor rowing fitness center in Long Beach, CA. The low-to-the-ground, long machine engages your legs, back, core and arms, delivering an intense full-body cardio experience. Best of all? Rowing won’t put as much stress on your knee and hip joints as running does, meaning that this type of training is ideal for people of all ages, sizes and walks of life. The Warmup Make sure to spend about 10-15 minutes to properly warm up and stretch before any of the following workouts are done. In rowing we always use the 'pic drill' to warm up by starting with just using our arms and then gradually [...]