Written by Runnergirl Training
Runners tend to hold tension in their upper body as they became fatigued when training or racing. This tension drains energy from being efficiently used.
A simple way to keep the upper body loose is to have the hands relaxed, with thumbs touching the fingers, as if you were holding a cylinder in your hand.
This will keep the hands from becoming clenched into fists and causing over tense muscle in the arms, neck, & shoulders.