To protect their shins from getting hit
        
             
        
        
        
Because you would not want to be injured for a big game coming up especially if you are one of the more skilled people on your team
        
             
        
        
        
<em>Five benefits of physical activity: </em>
1. It strengthens the body. - Physical 
2. It prevents illness. - Physical and Emotional 
3. It improves brain function. - Mental 
4. It increases energy level. - Mental and Physical 
5. It makes you feel happier. - Emotional and Social 
Physical exercise is beneficial to all aspects of human existence whether physically, mentally, emotionally, socially, or spiritually. Once you are physically healthy, the rest follows. Everything is interconnected. 
        
             
        
        
        
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!
 
        
             
        
        
        
It called the Pectoral muscles