Increased body hair
mood swings
hot flashes
sweat
body odor
growing pubic hair
appetite changes
taste bud changes
... there are more but i cant think of them hope this helps xoxo
B. As a cross country runner its very important to warm up before I run a marathon or a long distance run or just any run in general its always something I have to do. If your do the strenuous activity without warming up your muscles will be tight and will sort of go into shock. By warming up you are releasing tension in your muscles and ligaments and getting you blood flowing. In my experience I didn't warmup once before a half marathon and had to stop about a mile in because I tore my hamstring. It strained it right off the bat and kept getting worse just because I forgot to stretch! I hope this helps!
A form of stretching that's used in sports. I learned that in my school i'm not sure though because some school's learn it differently. ≥ω≤ Hope I helped