Athletes pull hamstrings and strain quadriceps. These muscles are prone to inury because they both involve the hips and knees - big powerful joints. And both sets of muscles are particularly helpful when running and jumping. The moment of injury is usually unforgettable. Sharp debilitating pain and an audible "pop". Some say it's like getting shot in the thigh.
The worst part to many athletes about pulling a hamstring is the reality that the hamstring, once injured will now always be prone to strains and tears. It is critical to athletic performance that these muscles heal properly. Hamstrings can take 6 months to knit back together.
The words "rest", "ice", "compression", and "elevation" need to become very familiar to the athlete suffering with a thigh strain. Asprin too.
Once injured, reinjury prevention is essential. Warm-up, stretch, and condition. A thigh sleeve can provide warmth and compression to your hamstrings and quadriceps. This increases blood flow to the muscles - that can help.
If the injury reoccurs make sure the muscle heals completely before trying again.