There are many treatments for back pain, including physical therapy, medications, and lifestyle modifications like increasing movement. Walking on a treadmill is one popular way to increase movement.
But, frustratingly, the treadmill can also cause or exacerbate back pain. Here are a few reasons why and tips for what you can do about it.
Causes of Back Pain on the Treadmill
Even though you can’t change the mechanics of this popular machine, understanding and addressing posture and muscle weakness may reduce the likelihood of fatigue or strain.
Posture
“What happens is the force from gravity can’t be attenuated the same way,” says Natalie Niemczyk, DPT. “The spine is designed so that it can attenuate the force appropriately that you don’t even notice.”
Poor posture, especially rounded shoulders, causes a lot of that force to be applied on the low back.
Correcting for “good” posture can be hard. Be patient and expect that it will take time to fix the issue.
“The biggest advice I always give is that it’s better to be conservative and start slow, and then introduce some of those little tweaks that might help your natural posture,” Dr. Niemczyk says.
Here are some of those little adjustments to think about while on the treadmill:
- Keep a neutral gaze ahead of you and a neutral spine.
- Hold your shoulders slightly back, while keeping your arms loose.
- If you are running or walking on an incline, you’ll want to lean forward about 10 degrees in your trunk.
“It’s normal to lean forward as you walk uphill or up an incline, but too much may indicate it’s too steep or you are going too quickly,” says Ben Fung, DPT.
Weakness in Stabilizing Muscles
Having certain weaknesses in stabilizing muscles like the core and the posterior chain (the muscles that make up your backside like the low back, gluteals and hamstrings) can lead to fatigue, which can affect your posture.
As mentioned above, in order to walk on the moving belt of the treadmill, your body also has to work slightly differently than if you were propelling yourself forward on stationary ground. It requires more work from the hip flexors, in particular, according to Lauren Shroyer, MS, certified athletic trainer and vice president of product and innovation for the American Council of Exercise.
“The hip flexor muscles are the muscles that will lift your leg up from behind and pull it back forward, so that you can step your foot down again,” she says.
That movement only compounded when you are walking on a steep incline (anything above a 5 on the treadmill). “We don’t tend to have that kind of strength in the hip flexor,” Shroyer says.