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)
Muscle atrophy takes place when a muscle partially or completely wastes away and its mass decreases. Most cases of muscle atrophy are usually results of other pre-existing medical conditions that include the loss of muscle mass as a side effect. Loss of muscle mass can be characterized by fatigue, extreme muscle weakness, or the actual shrinking of the physical body of the affected individual.