Why is warming up before vigorous activity is important?

I do physical therapy (doctor prescribed because of lower back pain) and I have to warm up or else you will lock up or getting cramps.

The worse one I got was a Charley Horse.

so yeah

put a penis in a vagina

1. h

2.a

3. i

4. d

5. b

6.f

7.g

8.e

9.c

i hope that this is