Even though the calf muscles are comparatively small, people still like to to load them up with heavy weight. So it is very important that any calf machine be built solid and correctly designed. The Super Seated Calf machine from Panatta is rated for 270 kg and certified for studio use. This is achieved by its solid construction and use of industrial grade bearings on the pivot points. The padded knee supports are gas adjustable in height, and the padding is firm to prevent distortion leading to premature wear whilst using heaving weight.