The Speed Harness improves all elements of speed by training stride length and frequency in 2 athletes simultaneously. Stretch the Slastix tubing to the desired tension and have both athletes run in the same direction. The front athlete receives resistance training while the back athlete receives overspeed training. The Speed Harness can also be useful when teaching shape, or drilling for speed on the soccer pitch. The fully sheathed Slastix resistance tubing provides a smooth, consistent pull for both athletes while offering maximum safety. Athletes can change direction easily without removing the harness.