Not really. Cats do "spaz out" episodically but a typical human with the same amount of exercise would probably be a flabby sack of fat with cardiovascular issu

Not really. Cats do "spaz out" episodically but a typical human with the same amount of exercise would probably be a flabby sack of fat with cardiovascular issues. The activity isn't predictive of the rate of muscle atrophy to the same degree across species, because loss of muscle is mediated by a specific, variably effective biochemical cascade and is not a consequence of inactivity per se. Similarly, loss of memories or cognitive skills is an active process that may have negligible speed even without much utilization. But I'm nitpicking.