During a sprinting motion, the hamstrings can be affected and injured. There seem to be two types of hamstring injuries that can occur...
A Simple Look at the Step Back
Knee passing the Toe is OKAY during a Squat?!
Weak Gluteus Maximus a Bad Thing?
Article Review - Kinesiology of the Hip
Detailed look at LeBron's 2014 Diet
The Neglected Spinal Region - Thoracic Spine
Individualized Diet Made Right
Your gut is connected to your brain, and here's an example why
The Bad and the Good - Caffeine