As to which type of guitar capo will best suit your playing, you will need to match the capo to your guitar, the primary factor being whether you have a flat fretboard, like a nylon-stringed classical or some steel-string acoustics, or if the fretboard is curved, like on most steel-stringed acoustics and electrics.
However, note that other causes of the symptom 'Muscle mass loss' may be possible. Research the causes of these symptoms that are more broader types of symptom than Muscle mass loss: Muscle atrophy (351 causes)
Causes of Muscle Loss: There is a proportional relationship between declining levels of testosterone and muscle loss in men. Testosterone is vital to producing strong muscles, they go hand in hand. The hormone binds to receptors in your muscle cells, telling your muscles to contract and grow. When your body is experiencing a loss of testosterone it can cause male muscle loss because there is not enough of the hormone to bind to your muscle cells.