My face skin looks way better with regular exercise. Something about the pores + overall tone. I start to notice a difference after 2 sedentary days, and am repulsed by it after a week+ without exercise. I also get a musk coming from my groin that seems to seep through clothes, and is barely affected by showering.
By sedentary I mean full-on jacked-in to the Matrix, 14 hour days on the computer. Someone with a more balanced life will probably experience it differently.