接力交棒

RelayHandoff turns relay exchange practice into a clear, adjustable timing plan.

Enter the incoming runner's speed, the receiver's acceleration, and the takeoff mark. The app advances both athletes along a 30-meter exchange zone and estimates the handoff position, speed difference, and legal margin. Scrub through the timeline to inspect the critical moment or replay the simulation after each adjustment.

Save and compare multiple athlete plans to prepare marks before practice and review trial runs afterward. All training parameters are stored locally on your device.