I want to reduce my leg size but still gain muslce on my arms at the same time?

i want to reduce my thigh width from 16 inches to about 13, i run three times a week and bike to school 5 times a week, which is about a 30 minute bike one way. i eat very healthly and have a large protein intake and a low fat intake. i also have a skinny upper body and without losing weight on my shoulders and arms i want to lose weight on my legs. what is the best way to do so.
Answer:
Alternate days in between working out your legs and arms.if you do cardiovascular work out for your legs they'll tone up real nice and strength training for your arms so that you won't loose body fat in your upper body. It's going to be hard but if you pay close attention to how your body reacts to different exercises you'll be able to do it.

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