Is it good for the skin to sweat out waste products while exercising?

In winter, people mostly exercise indoors, but when the weather gets warmer, many people run outside or exercise, sweating more than usual.

I think I get less acne, maybe because the waste products are being removed, but I'm worried about my skin becoming too dry right after working out. It feels like the good oils are being removed as well. I'm not sure if this is good or bad for my skin.

Clinics and cafes often say hydration is key. But what other ways are there besides drinking plenty of water?