I used to wear shorts down to -5 or so when I went jogging. I put out a lot of heat when I exercise, and I will sweat at any temp. My knees need to be kept warm

I used to wear shorts down to -5 or so when I went jogging. I put out a lot of heat when I exercise, and I will sweat at any temp. My knees need to be kept warm though, or they sort of catch and make a disturbing clicking noise.