This harness and leash combo provides an economical choice for resistance sprint training. The leash can be manually resisted by another athlete or coach, or can be attached to a sled or tire. This harness will improve running mechanics by forcing the athlete into the proper forward lean angle and promote maximum knee drive. Both ends of the leash can be attached to the harness to create a handle for a partner to hold onto, or one end can be attached to a sled, tire, or weighted device.