A standing calf machine distributes the weight on your entire body – including your back. If you have problems with your spine, a seated calf machine might be more suitable for you. However, it does put more stress on the calves, so it might be more efficient in working those muscles.
The machine is designed to perform exercise for the following muscle groups: greater pectoral muscle, teres major muscle, Pectoralis minor, Latissimus dorsi.