I hope this isn't a stupid question! I really love running and I've been doing it seriously for about a year (5-10 miles at a time and the occasional half-marathon). Over the past few months I've noticed a lot of muscle developing in my inner-thighs and I don't like it. I've been told that adjusting speed or doing intervals can affect which muscles I use but I don't know how that works. I'm okay with my calves getting bigger, and I already run on my toes. Any thoughts on how to avoid further bulk on my thighs? I've thought about taking a break from running altogether but I'm afraid the alternative won't burn as many calories, leading to weight gain. Suggestions?
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