How do I control acne caused from running?

I have really bad acne on the back of my legs from running. I don’t have acne otherwise, and I don’t stay in sweaty clothes any longer than I have to after my runs. Is there anything I can do besides scrubbing the s*hit out of them every day?

Question about transitioning between swimming and biking in a triathlon?

I’m not sure what kind of clothes I’m supposed to wear. I don’t think I can manage to run without a sports bra/just in a swimsuit. Should I just slip on my sports bra over my swim suit?