Is it true that lighter weight more reps tones better than heavy weight fewer reps?
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Gus you’ve posed a tricky question.
I get sort of stymied when I hear the word “tones” because I really don’t understand what you are trying to express when you use that word.
What I will say is that according to the science, when one uses light weights and performs many repetitions the outcome is muscular endurance.
Whether it is better is dependent on the fitness goal. A long-distance runner might be more suited to train with light weights and high reps as opposed to a sprinter. The long-distance runner would be more concerned with have strong muscles that endure and a sprinter would be more concerned with being able to produce power quickly for a short time.
I hope this has answered your question.