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)
When this happens, your body loses more protein than it retains, and you need to eat more protein to maintain your lean body mass.11-14. When people restrict their calorie intake, those who eat more protein generally lose less muscle and more fat.2,15-23.