This Life Fitness Seated Leg Press works many of the same muscles as the squat, without putting as much load on the spine and knees. Life Fitness’s Pro Series is a line of Highly durable commercial selectorized gym equipment. Life Fitness is the most trusted brand in gym equipment and the Pro Series is a great choice for a used selectorized circuit. This leg press has a 400 lb. stack, is extremely smooth, and is true to weight.