Sloths are considered as arboreal mammals *( that is living on trees) and they have very less muscle mass, which is about 30 % lesser than that of similar sized mammals. This is because their muscles are made up of slow-twitch fibers, which provide them a lot of power to withstand any stress while not using a lot of energy.
Therefore, their lesser muscle mass help them in conserving energy
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So Sam has the disorder and one of his parents are likely the carrier since Sam is their son. That’s all I can provide since that’s all the info I was given.
