The squat. One of the most standard fitness exercises. When executed properly it effectively works muscles all throughout the front and back of the lower body. As fitness instructors, we cannot take for granted that everyone in our classes knows how to squat. I was at the gym this morning, not teaching, just working out. I noticed a man "squatting" while being lead by a personal trainer in a small group fitness setting. The man was doing EXACTLY what I tell all of my trainees in a Barre Intensity Barre Certification not to do; he was moving from the knees without recruitment of the hips.