Are treadmill sprints effective?

For conditioning and incline acceleration work, yes. For top speed, they are limited. Commercial models such as the Life Fitness Integrity+ (14 mph) and Body-Solid T150 (12.5 mph) top out well below a sprinter's top speed, and sprinting on a conventional motorized treadmill gives longer ground contacts and a longer braking phase than sprinting on the ground.

How fast should I sprint on a treadmill?

Pick a speed you can hold with good form for the whole rep. For short incline sprints, 8–10 mph at 8–12% incline is a starting point for many athletes. For flat intervals, 11–14 mph for 10–15 seconds, depending on the belt's top speed and your level.

Is it safe to jump onto a moving treadmill?

It is the riskiest part of treadmill sprinting. Practice the straddle method at jogging speeds first: stand on the side rails, hold the handrails, step onto the moving belt with quick steps, then let go once you are in rhythm. Clip the safety key to your clothing for every rep, and follow your gym's rules, since some ban it.

What incline should I use for treadmill sprints?

Use 1% for steady running to match the energy cost of running outside. For sprint intervals, 8–12% turns the rep into a hill sprint at a speed the belt can handle. Commercial treadmills such as the Life Fitness Integrity+ and Body-Solid T150 go up to 15%. Lower the speed as you raise the incline.

Treadmill sprints: how they compare to the track, and safe workouts

Q: Are curved treadmills good for sprinting?

They are closer to real sprinting because you drive the belt and can accelerate from a standstill. Expect each speed to feel harder: in one study, running at a set speed on a curved treadmill required a higher percentage of runners' maximal oxygen uptake than running overground, a difference of 22%. Sprint results were reliable after two practice sessions.

By the Sprint University coaching team

Treadmill sprints work best as incline accelerations and short repeated sprints. Common commercial gym treadmills top out at 12.5–14 mph (about 5.6–6.3 m/s), well below a flat-out sprint, and the belt sets the speed, so you can't accelerate from a standstill. You also have to get on and off a moving belt safely, which is the hardest part.

Steady running on a treadmill is close to running on the ground, but sprinting on a conventional belt changes your ground contact. A curved non-motorized treadmill, which you push yourself, is closer to the real thing. Use the treadmill when you can't get outside, and do your top-speed work on the ground.

How treadmill sprinting differs from overground

At steady speeds, a treadmill is a fair copy of the ground. A 2020 meta-analysis of 33 studies and 494 runners found most measures matched. On the treadmill, runners landed with a flatter foot (about 10° less foot angle at strike) and spent about 5 ms longer on the ground. Those studies covered steady running.

Sprinting on a conventional belt

McKenna and Riches filmed 13 recreationally active men sprinting faster than 7.0 m/s on a conventional motorized treadmill, a torque-driven treadmill and the ground. On the conventional treadmill, ground contact and the braking phase were longer, the knee was straighter at foot strike and the hip extended faster. The torque treadmill, where the runner drives the belt, matched overground sprinting except for a less extended hip at toe-off.

An older study of five college sprinters running 100 yards found the support leg landed less upright on the treadmill (83.9° vs 88.3°) and swept through more range, faster. The sprinters' oxygen debt after the sprint was 36% higher overground, and the author suggested that the moving belt reduces your energy cost by bringing the support leg back under your body.

No acceleration and no air

On a motorized treadmill you match a speed the belt already has, so the first steps of a sprint, where you drive yourself from zero, don't happen. There is also no air resistance. For steady running between 2.92 and 5.0 m/s, a 1% incline made treadmill running cost the same energy as running on a road. That figure comes from distance-running speeds and doesn't extend to sprints.

Performance is less clear. A 2019 meta-analysis found that sprint performance on treadmills varied a lot between studies and wasn't significantly different from overground on average.

How fast do treadmills go?

Two common commercial models: the Life Fitness Integrity+ runs 0.5–14 mph with a 15% incline, and the Body-Solid Endurance T150 runs 0.5–12.5 mph with 0–15% incline. Those speeds convert like this:

Belt speed	km/h	m/s	Mile pace	100m at that speed
8 mph	12.9	3.6	7:30	28.0 s
10 mph	16.1	4.5	6:00	22.4 s
12 mph	19.3	5.4	5:00	18.6 s
12.5 mph	20.1	5.6	4:48	17.9 s
14 mph	22.5	6.3	4:17	16.0 s

A belt at 14 mph would take 16.0 seconds to cover 100m. Research labs use custom high-speed treadmills to reach sprint speeds. On one, competitive sprinters reached 10.4 m/s (about 23.3 mph) and other athletes 8.7 m/s (about 19.5 mph). A gym treadmill gives you fast running, and top speed needs the track. The how fast can a human run page has the numbers for elite sprinters.

Treadmill sprint safety: getting on and off

A treadmill belt changes speed gradually, so for short sprints most athletes set the speed first and step onto the moving belt. That is where people fall. Learn it at jogging speed before you try it fast.

The straddle method

Clip the safety key to your waistband. If you fall back, it pulls out and stops the belt.
Stand with a foot on each side rail and both hands on the handrails. Set the speed and let the belt reach it.
Still holding on, start your feet moving with quick steps on the belt, near the front of the deck. Let go once you are in rhythm.
Sprint in the middle of the belt, looking forward, arms swinging clear of the rails.
To finish, take hold of the handrails and step your feet out to the side rails one at a time. Don't jump off the back.

The ramp method

The safer alternative is to start each rep from a jog and press the speed up. The rep then includes the time the belt takes to speed up and slow down, so make it longer (15–20 seconds) and count only the time at speed. Use this method on any treadmill you don't know, at high inclines, and whenever you feel tired.

Incline treadmill sprints

Setting the incline turns a treadmill sprint into a hill sprint at a speed the belt can handle. At 8–12% you have to lean and push hard to keep up, and you reach maximal effort well below the belt's top speed. The two commercial models above go to 15%. The hill sprints guide explains what each grade trains.

Lower the speed when you raise the incline, and use the ramp method if straddling a steep, fast belt feels unstable. Don't hold the handrails while you run: it takes your arms out of the sprint and takes load off your legs.

The Sprint University app

A sprint program built from your times

Sprint University programs acceleration, top speed, speed endurance, plyos and strength week by week from your current times. On a low-readiness day it keeps the intensity and trims multi-set blocks to about 70% of their sets.

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Sprint workouts on a treadmill

Warm up for 10–15 minutes first: easy running on the belt, then the dynamic drills from the sprint warm-up beside it, then two or three short build-ups at increasing speed. The speeds below are starting points. Adjust them to your level and your treadmill.

1.Incline accelerations

6–8 × 8–10 s at 8–12% incline, step off, 2 min rest

The closest a motorized treadmill gets to acceleration work. Pick a speed you can hold with a forward lean and a hard push (8–10 mph is a starting point for many athletes), straddle on, run the rep and step off to the side rails. Raise the speed, not the incline, as you get used to it.

2.Flat speed intervals

8–10 × 15 s at 11–14 mph, 45 s rest on the rails

Repeated fast running near the belt's top speed. With 45 seconds of rest this is conditioning. To make it speed work, cut to 4–6 reps and rest 2–3 minutes. If the belt's top speed feels easy, add 2–4% incline.

3.Treadmill tempo

10–12 × 30 s at an easy, smooth pace, 1% incline, 30–60 s walk

For a low day. Run at the 60–75% effort of a tempo run, relaxed, and walk on the belt between reps with the speed turned down. No straddling needed.

4.Curved treadmill sprints

6–8 × 6–8 s from a standing start, 2–3 min rest

On a curved, non-motorized treadmill you start the belt yourself, so you can accelerate from a standstill. Sprint to top speed, then drift back on the curve to slow down. Your first two sessions are practice.

The rest decides what you are training. With 2–3 minutes or more between reps, every rep can be fast and the session trains speed. With 30–45 seconds, it trains conditioning. The sprint workouts guide covers rest for speed sessions, and tempo runs covers the easy days.

Curved non-motorized treadmills

A curved treadmill has no motor. The running surface is a curved belt, and your feet drive it. Move up the front of the curve and it speeds up, drift back and it slows down. You can accelerate from a standstill and stop when you choose, so there is no stepping onto a moving belt.

Expect it to feel harder than the track. In a study of 14 trained runners, running at a set speed on a curved treadmill required a higher percentage of their maximal oxygen uptake than running overground (a 22% difference) or on a motorized treadmill (16%), and heart rate was about 25 beats per minute higher than overground. Lighter runners worked harder, relative to their capacity, to overcome the belt's resistance. Don't compare curved-treadmill speeds with your track times.

It takes practice. In a study of 32 recreationally active adults doing a 30-second sprint on a curved treadmill, the first two trials differed, and trials three and four were reliable. Treat your first two sessions as learning, and use the treadmill's own readout to compare yourself with yourself.

Common mistakes

Jumping onto a fast belt without practice: Learn the straddle method at jogging speed first, and use the ramp method on any treadmill you don't know.
No safety key: Clip it to your clothing every rep. It is the fastest way to stop the belt if you stumble.
Holding the handrails while you sprint: It takes your arms out of the sprint and your weight off the belt. Lower the speed or incline until you can run hands-free.
Calling short-rest intervals speed work: Fifteen seconds on and 45 off is conditioning. Speed reps need 2–3 minutes or more.
Only ever sprinting on a treadmill: The belt can't train your start or your top speed. Sprint on the ground when you can.