Rating is available when the video has been rented.
This feature is not available right now. Please try again later.
Uploaded on Dec 9, 2011
The Endorphin MD3 track spike is built for the middle distance athlete running 400m to 1600m. It provides the optimal level of stiffness for minimal loss of energy while maintaining flexibility. If you're looking for a spike that feels like a part of you while enhancing your middle distance performance on the track, the Endorphin MD3 is for you.