Walking backwards on a treadmill is genuinely beneficial, and it’s not just a social media trend. It burns roughly twice the energy of forward walking at the same speed on a flat surface, reduces stress on the kneecap joint, and challenges your balance and coordination in ways regular walking simply doesn’t. The treadmill is actually the ideal place to try it, since the belt moves at a consistent speed and you don’t have to worry about tripping over obstacles behind you.
Why It Burns More Calories
Moving in reverse is metabolically expensive because your body isn’t built to do it efficiently. On flat ground, backward walking costs about 100% more energy than forward walking at the same pace. Your muscles have to work harder to control each step, and you lose the natural pendulum-like energy recycling that makes forward walking so economical. That gap narrows on steep inclines (dropping to around 5 to 8% more at gradients above 15%), but on a level or moderately inclined treadmill, you’re getting significantly more work done per minute than walking forward.
This makes backward treadmill walking a time-efficient option if your goal is to increase cardiovascular demand without jogging or running. A 15-minute backward walk can challenge your heart and lungs more than a 15-minute forward walk at identical settings.
Easier on Your Knees
One of the biggest draws of backward walking is how it changes the forces acting on your knee. When you move in reverse, the compressive force on the patellofemoral joint (the area where your kneecap meets your thighbone) drops substantially. Research comparing backward and forward movement at the same speed found that the peak force on this joint was about 3.4 times body weight going backwards, compared to 4.5 times body weight going forward. That’s roughly a 25% reduction.
This matters for anyone dealing with knee pain, runner’s knee, or osteoarthritis. A randomized clinical trial on people with chronic knee osteoarthritis found that adding backward walking to a standard rehab program was more effective at reducing physical disability than conventional treatment alone. Both groups experienced similar pain relief, but the backward walking group regained more functional mobility. If your knees ache during regular treadmill walking, reversing direction may let you keep training with less discomfort.
Different Muscles, Different Demands
Walking backwards shifts which muscles do the heavy lifting. EMG studies show that the calf muscles (specifically the medial gastrocnemius) work significantly harder during backward walking, while the shin muscle (tibialis anterior) and the outer hip stabilizer (gluteus medius) are less active compared to forward walking. This redistribution means your calves and the muscles around your ankles get a stronger training stimulus.
The quadriceps also engage differently. Because your foot lands toe-first rather than heel-first when walking backward, your thigh muscles control the motion through a different range, which is one reason physical therapists have used backward walking for decades in knee rehab programs. You’re essentially training the same leg in a new pattern, which can address muscle imbalances that build up from only ever moving forward.
Balance and Fall Prevention
Backward walking forces your brain to coordinate movement without the visual feedback you normally rely on. You can’t see where you’re stepping, so your body leans more heavily on proprioception, your internal sense of where your limbs are in space. A systematic review of eleven studies found that backward walking training improved balance performance across the board. One measurable outcome: single-leg standing time with eyes open increased by nearly a full second compared to control groups, which sounds modest but reflects a meaningful improvement in stability.
For older adults or anyone recovering from an injury that affected their balance, this type of training can be a practical tool. The treadmill adds a layer of safety since you can hold the handrails and control the speed precisely, making it easier to challenge your balance without the risk of actually falling.
How to Start
Most studies used sessions of 15 to 30 minutes, performed 3 to 4 times per week, for at least 6 weeks. That’s a reasonable framework to aim for, but you don’t need to start there. Begin with 5 to 10 minutes at a slow speed, holding the handrails until you feel comfortable with the rhythm. A speed of about 2 to 2.5 miles per hour is a sensible starting point for most people.
Adding a slight incline (around 10%) is common in research protocols and increases the challenge on your legs without requiring you to go faster. Several studies used a 10% gradient at about 2.5 mph and progressively increased session duration from 15 to 30 minutes over the course of 6 to 12 weeks. The key is consistency: benefits in balance, knee function, and fitness emerged after about 6 weeks of regular training in most trials.
One practical tip: position yourself toward the back of the treadmill belt before starting, so you have room to find your stride. Keep your posture upright rather than leaning back, and take shorter steps than you think you need. The movement will feel awkward at first, but most people find a natural rhythm within a few sessions.