The answer would be pubic hair. Because, secondary sexual characteristics.
Visible secondary sex characteristics are nonreporductive sexual characteristics.
For males things that will start to show are pubic hair, facial hair, and Adam's apple.
DRINK 8 glasses of water
TAKE the stairs
JOURNAL thoughts
Honestly, I'm not positive myself. All I can say is that overworking your joints without enough cool-down time will put you at high risk for arthritis.
