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“Muscular endurance” isn’t really a thing. We’re talking about exercise, so of course the muscles are involved.
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You won’t induce significant metabolic adaptations (of the type that improve endurance performance) by lifting weights, regardless of the weight/number of reps.
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Lactate clearance is irrelevant, so tossing it into the discussion is just a red herring.
Basically, ChatGPT’s answer reads like the sort of calorie-free fluff you might find in Bicycling! magazine, versus something written by a knowledgeable person.