Lead runner and trailing runner take turns providing assisted acceleration. As the trailing athlete runs past the lead runner they exchange roles. The trailing athlete provides resistance to the lead runner. When the resistance cord is maxed out the trailing athlete takes advantage of the resistance to accelerate past the lead runner.

• 4' Safety Sleeve Elastic with 2-swivel belts.
• Continuously, alternate overspeed, passing, and resistance running.
• Stretches to 10'.