Sprinting

Assisted Overspeed Sprint

The assisted overspeed sprint uses a motorized towing system to pull you slightly faster than your unassisted sprint speed. It challenges high-speed running coordination and leg turnover.

Higher injury risk. Read the safety notes before adding weight.

  • Advanced
  • Higher injury risk
  • Rest 4 min
Video by Kbands Training on YouTube

How to do it

  1. Secure the system’s harness around your body according to its fitting instructions.
  2. Take your starting position in line with the towing cable.
  3. Accelerate through the approach zone as the programmed assistance builds.
  4. Sprint through the assisted zone with your torso tall.
  5. Continue running through the programmed reduction in assistance.
  6. Slow gradually through the run-out area until you stop.

Form cues

  • Keep your jaw and shoulders relaxed
  • Drive your elbows back
  • Keep your hips high

Common mistakes

  • Reaching forward with each strideBring your foot down close beneath your hips rather than stretching it forward to match the pull.
  • Leaning backward against the towReduce assistance if you cannot run without resisting the harness.
  • Chasing a faster device settingUse only enough assistance to slightly exceed your measured unassisted speed while preserving your normal sprint rhythm.

Safety

Excessive assistance or an unexpected cable pull can cause a high-speed fall. Running beyond your current capacity, especially when fatigued, increases the risk of hamstring or calf strains.

  • Use a trained operator familiar with the system; inspect the harness, cable, attachments, and emergency-stop function before running.
  • Warm up with progressively faster unassisted runs before attempting assisted efforts.
  • Reserve a clear, dry lane with ample run-out space, keeping everyone outside the cable path.
  • Agree on an abort signal beforehand; have the operator stop assistance using the system’s procedure for cable slack, sudden pulling, pain, lost control, or lane obstruction.

Choose unassisted sprinting if you lack consistent maximal-speed running technique, and get professional medical advice first if you have a recent lower-limb injury.

Muscles worked

Front
Back

Primary muscles

  • Glutes
  • Hamstrings

Secondary muscles

  • Calves
  • Foot & Ankle Stabilizers
  • Hip Flexors
  • Quadriceps

Equipment

  • Motorized Sprint Assistance System

Sets and reps

Sets
3–4
Target
10–20 meters
Rest
4 min

This is an advanced starting dose, not a general-fitness beginner exercise; log the assisted zone and allow full recovery, extending rest beyond four minutes if needed.

Variations