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)
Abnormal loss of lean body mass, such as that found in malnutrition, is responsible for the many complications of undernutrition, such as an increase in susceptibility to infections. Overnutrition, on the other-hand, increases total body fat and places excess fat around the internal organs.