Walking backwards on a treadmill has moved from an unusual rehabilitation technique to a mainstream fitness practice, appearing on social media feeds and in physical therapy clinics with increasing frequency. The interest is justified: backwards walking (also called retro walking or retrograde walking) produces a genuinely different biomechanical and muscular stimulus from forward walking, and the specific differences make it valuable for several training and rehabilitation goals that forward walking does not address.
Understanding what these differences are, who benefits most, how to perform it safely, and how to programme it appropriately separates the practical value of backwards treadmill walking from the novelty.
What Walking Backwards on a Treadmill Is
Backwards treadmill walking involves walking in the reverse direction on a moving treadmill belt, so the treadmill moves the belt backward (away from you) while you walk forward relative to your body but backward relative to your direction of travel.
The practical setup:
Rather than facing the front of the treadmill as in normal use, the user faces the back of the treadmill. The belt moves away from them and they step backward with each step, keeping pace with the belt.
An important safety note upfront: Backwards treadmill walking requires the user to face away from the emergency stop button and the primary display. Beginners should always hold the side rails during the initial learning period and should start at very low speeds. This is not an exercise to attempt at speed without prior experience.
How Backwards Walking Differs From Forward Walking: The Biomechanics
The biomechanical differences between forward and backwards walking are the foundation of every specific benefit the exercise provides.
Contact Pattern Reversal
In forward walking, the foot contacts the ground heel-first (heel strike), then rolls through to push off from the toes (toe-off).
In backwards walking, this pattern reverses: the foot contacts the ground toe-first, then rolls back through to push off from the heel. This reversal changes the joint loading pattern, the muscle activation sequence, and the energy demands of walking in specific ways.
Knee Loading Changes
Forward walking produces a significant knee extension moment at heel strike as the body’s weight is transferred over a forward-extended leg. This extension moment is resisted primarily by the quadriceps eccentrically.
Backwards walking produces a different knee loading pattern. As the toe contacts the ground and the weight is transferred backward, the knee flexes eccentrically in a manner that is more controlled and gradual than the heel-strike pattern of forward walking. The peak knee extension moment is significantly reduced compared to forward walking.
The clinical implication: People with anterior knee pain, patellofemoral pain, and early knee osteoarthritis often find backwards walking more comfortable than forward walking because the peak knee joint loads are reduced. This is why backwards walking is commonly prescribed in knee rehabilitation settings.
Changed Muscle Activation
The reversal of the gait pattern changes which muscles are most active during each phase of the step:
Quadriceps: More continuously active during backwards walking compared to forward walking. In forward gait, the quads have a brief off-phase during mid-stance. In backwards gait, the quads work more continuously to control the knee flexion and extension across the step.
Hamstrings: Work in a different phase during backwards walking. In forward gait, the hamstrings decelerate the forward-swinging leg. In backwards walking, the hamstrings contribute differently to the backward propulsion pattern.
Hip extensors (gluteus maximus): More active during backwards walking because the hip extension that propels each backward step requires deliberate gluteal activation.
Tibialis anterior: The muscle that dorsiflexes the ankle (lifts the toes) is more active during backwards walking because the toe-contact pattern requires the ankle to plantarflex in a controlled manner to contact with the toes first.
Gastrocnemius and soleus: Active during the push-off from the heel at the end of each backwards step, which is different from the typical toe push-off of forward walking.
Energy Expenditure
Research consistently shows that backwards walking at the same speed as forward walking produces greater energy expenditure (approximately 20 to 40 percent more calories burned at equivalent speeds). This higher energy cost comes from:
- The unfamiliar movement pattern requiring greater cognitive and neuromuscular effort
- The increased quadriceps activity throughout the step cycle
- The reduced efficiency of the backwards gait pattern compared to the highly optimised forward gait
The Muscles It Specifically Targets
Based on the biomechanical changes described above, backwards treadmill walking specifically develops:
Quadriceps: The continuous quadriceps demand of backwards walking makes it one of the most effective low-impact quadriceps exercises available. Unlike forward walking where the quads have recovery phases, backwards walking maintains quad activation throughout the stance phase.
Gluteus maximus: The deliberate hip extension of backwards propulsion develops glute activation in a movement pattern distinct from forward walking.
Tibialis anterior: The controlled toe-first contact of backwards walking specifically develops the tibialis anterior, which is the primary ankle dorsiflexor and is commonly underdeveloped in people who spend most of their activity in forward gait.
Core stability muscles: Backwards walking requires greater balance and postural control than forward walking, increasing the activation of the core stabilisers that maintain upright posture during the unfamiliar movement pattern.
Who Benefits Most From Backwards Treadmill Walking
People With Knee Pain and Patellofemoral Pain
The reduced peak knee extension moment during backwards walking makes it one of the most useful low-impact exercise options for people with:
- Patellofemoral pain syndrome (as covered in the patellofemoral pain syndrome physical exercise article on this site)
- Early knee osteoarthritis
- General anterior knee pain during forward running and walking
Research on backwards walking in people with knee osteoarthritis and patellofemoral pain consistently finds reduced pain during and after backwards walking sessions compared to forward walking at equivalent intensities.
People Recovering From Knee Surgery
Following knee replacement, ACL reconstruction, or other knee procedures where forward walking produces significant joint stress, backwards walking provides a way to maintain cardiovascular fitness and develop quad strength at lower joint loads.
Athletes Seeking Quad Development Without High Joint Loading
Athletes in heavy training blocks who need additional quad volume without adding to the patellofemoral and tibiofemoral loads of squatting can use backwards treadmill walking as a low-impact supplementary quad development tool.
People Rehabilitating Shin Splints
The increased tibialis anterior activation of backwards walking provides a specific strengthening stimulus for the anterior compartment muscles involved in medial tibial stress syndrome. Some rehabilitation protocols include backwards walking specifically for this reason.
People With Lower Back Pain
Some research suggests that backwards walking reduces lumbar spine loads compared to forward walking, making it a useful low-impact activity for people with lower back pain who find forward walking aggravating.
Athletes Seeking Balance and Proprioception Development
The unfamiliar movement pattern of backwards walking produces significant proprioceptive and balance challenges that forwards walking does not. As covered in the balance drills for athletes article on this site, varied proprioceptive challenges develop the neural integration speed that transfers to athletic performance.
How to Walk Backwards on a Treadmill Safely
Setup and Safety
Before starting:
- Identify the emergency stop button and the cord before turning away from the display
- Clip the emergency stop cord to clothing if the treadmill has one (this is more important during backwards walking because you face away from the console)
- Clear the area around the treadmill: backwards walking reduces spatial awareness of what is behind you
- Have a partner or gym staff member present during the first few sessions if possible
Rail use:
- Always hold the side rails during the first several sessions of backwards treadmill walking
- Use the rails for balance assistance rather than for support of body weight
- As confidence and balance develop, gradually reduce rail dependence, but there is no requirement to let go entirely, particularly at higher speeds
Speed Guidance
Starting speed: 1.5 to 2 kilometres per hour (approximately 1 to 1.2 miles per hour). This is significantly slower than typical forward walking speed. The backwards pattern requires full attention and balance at any speed initially.
Beginner speed range: 2 to 3 kilometres per hour for the first 2 to 4 weeks
Intermediate speed range: 3 to 4.5 kilometres per hour once balance and the pattern are established
Advanced speed range: 5 to 6 kilometres per hour for experienced users with good balance. Speeds beyond 6 kilometres per hour during backwards walking require exceptional balance and spatial awareness and are not appropriate for most users.
The speed rule: Never increase speed beyond the point where you can maintain balance without gripping the rails for support. The appropriate speed is the fastest speed at which you can walk with fingertip rail touch only for balance assurance rather than gripping for stability.
Starting the Treadmill
Method 1 (recommended for beginners): Stand straddling the belt with one foot on each side rail. Have a partner or staff member start the treadmill at a very low speed (1.5 kilometres per hour). Carefully step onto the moving belt one foot at a time, facing away from the console.
Method 2 (for experienced users): Face away from the console, grip the rails, and step on the back of the belt (nearest to the console) while the treadmill is at rest. Start the treadmill at a low speed and begin walking backwards as the belt begins to move.
The Walking Pattern
Foot placement:
- Step backward with one foot, contacting the treadmill belt with the toes and ball of the foot first
- Roll the foot backward to the heel as the weight transfers
- Push off from the heel as the body weight moves forward (relative to the direction of travel)
- Step backward with the other foot and repeat
- The stride length should be comfortable and controlled, not reaching too far backward with each step
Torso position:
The torso should remain upright with a slight backward lean (toward the direction of travel, which is the back of the treadmill). Excessive forward lean or excessive backward lean both reduce balance and increase fall risk.
Head position:
Look straight ahead (toward the back of the treadmill, away from the console). Turning the head to look at the console or around the gym while walking backwards significantly increases fall risk.
Incline
Starting on a flat treadmill is recommended for all beginners. Once backwards walking is well-established at flat, a slight incline (1 to 3 percent) can be added:
Incline effects on backwards walking:
- Increases the quad demand (the knee must work harder against the incline)
- Increases the glute activation
- Increases the energy expenditure
- Increases the cardiovascular demand
Some rehabilitation protocols specifically use backwards walking on an incline for knee rehabilitation because the incline increases the quad strengthening stimulus while the backwards pattern keeps the knee joint loads manageable.
Clinical Applications
Knee Osteoarthritis
Multiple studies have examined backwards walking as an intervention for knee osteoarthritis. A systematic review published in 2022 found that backwards walking programmes of 4 to 8 weeks produced significant improvements in pain, physical function, and quadriceps strength in people with knee OA, with effects comparable to or greater than forward walking programmes of equivalent duration.
Practical protocol for knee OA:
- 15 to 20 minutes of backwards treadmill walking
- 2 to 3 times per week
- At a comfortable speed (typically 2 to 3 kilometres per hour initially)
- Alongside the quad strengthening programme covered in the buckling knee exercises article on this site
Post-ACL Rehabilitation
Backwards treadmill walking is increasingly used in ACL rehabilitation programmes as an early cardiovascular and quad-strengthening exercise that does not produce the anterior tibial shear forces associated with forward running. It is typically introduced 4 to 8 weeks post-surgery depending on the protocol, before forward running is reintroduced.
Shin Splint Rehabilitation
As covered in the straight leg calf raises article on this site in the context of calf muscle rehabilitation, the anterior compartment muscles (particularly tibialis anterior) are specifically stressed in medial tibial stress syndrome. Backwards walking, with its increased tibialis anterior demand, provides a specific strengthening stimulus that complements the standard shin splint rehabilitation programme.
Programming Backwards Treadmill Walking
As a standalone cardiovascular exercise:
20 to 30 minutes of backwards treadmill walking at a comfortable speed, 2 to 3 times per week. Produces cardiovascular benefits alongside the specific quad and tibialis anterior development.
As a quad development tool:
15 minutes of backwards walking following a lower body strength session. The additional quad volume without added joint stress is the primary purpose.
As a rehabilitation exercise:
Follow the condition-specific protocols described in the clinical applications section. For most rehabilitation purposes, 15 to 20 minutes of backwards walking 2 to 3 times per week is the standard starting protocol.
Combined forward and backwards protocol:
A practical combined protocol alternates forward and backwards walking for a total session:
- 5 minutes forward walking (warm-up)
- 5 minutes backwards walking
- 5 minutes forward walking
- 5 minutes backwards walking
- 5 minutes forward walking (cool-down)
This protocol maintains the cardiovascular benefit of forward walking while incorporating the specific benefits of backwards walking within the same session.
Progressive speed protocol:
- Weeks 1 to 2: 2 kilometres per hour, holding rails, 10 minutes total backwards walking
- Weeks 3 to 4: 2.5 kilometres per hour, fingertip rail contact, 15 minutes
- Weeks 5 to 6: 3 kilometres per hour, fingertip contact, 20 minutes
- Weeks 7 to 8: 3.5 kilometres per hour, occasional rail touch, 20 to 25 minutes
Frequently Asked Questions
Is walking backwards on a treadmill dangerous?
The primary risks are falling and loss of balance, both of which are significantly higher during backwards walking than forward walking because the movement pattern is unfamiliar and spatial awareness is reduced. These risks are manageable with appropriate speed selection (starting very slowly), rail use during the learning period, and using the emergency stop cord. Serious injuries from backwards treadmill walking occur primarily when people attempt speeds too high for their balance ability or when they release the rails before adequate balance is established.
Does walking backwards on a treadmill actually help knees?
Yes, based on available research. The reduced peak knee extension moment during backwards walking reduces the patellofemoral joint stress and tibiofemoral joint stress that makes forward walking painful for people with knee OA and patellofemoral pain. Multiple studies have found meaningful improvements in knee pain and function from backwards walking programmes. It is not a cure but it is a useful component of a knee rehabilitation programme.
How fast should I go when walking backwards on a treadmill?
Start at 1.5 to 2 kilometres per hour. This is much slower than it sounds and much slower than typical forward walking speed. The backwards pattern requires complete attention and balance control that makes even low speeds challenging initially. Progress speed gradually based on the ability to walk with light fingertip rail contact rather than gripping the rails for stability.
Can I run backwards on a treadmill?
Backwards running on a treadmill is possible but is significantly more dangerous than backwards walking and should only be attempted by experienced users with excellent balance at high speeds. For most people, the benefits of backwards treadmill exercise are fully achievable through backwards walking without the substantially elevated fall risk of backwards running.
How long should I walk backwards on a treadmill per session?
Begin with 10 minutes of backwards walking per session and build to 20 to 30 minutes over 4 to 6 weeks as balance and confidence develop. There is no evidence of additional benefit from sessions longer than 30 minutes of continuous backwards walking for most applications.