4 min readAs some runners bundle up and brave the cold to train for spring races, I’ve resigned myself to treadmill training. But every time I run, I get a staticky shock whenever I press a button or turn a dial midrun. So what gives?
“It’s simple physics,” said Jared Willardson, vice president of product engineering for iFIT, Inc. “Static shock is an issue that has plagued many home appliances, not just treadmills. Now most appliances come with a grounding mechanism incorporated into the design.”
According to Willardson, dry air, the clothing material or shoes you’re wearing, or the electrical system (i.e., faulty wiring) are common reasons your treadmill could be shocking you. One simple solution: moisturize. “Dry skin holds static charge increasing the potential for an unpleasant shock,” he said.
Could it be as simple as lathering up like I’m heading to the beach before hitting the belt?
Other Reasons Your Treadmill Is Attacking You
Moisturizing is good advice in general during the cold season, but there are other anti-shock solutions to consider. Anthony Winge, director of product development at Johnson Health Tech, whose brands include BowFlex, Horizon Fitness, and Schwinn Fitness, also gave some pointers. Here’s some of the remedies he suggested:
In Defense of Cotton
Synthetic materials like polyester and nylon (aka the quick-drying material used for tech tees) build up a higher static charge. So consider running in natural fibers like cotton, bamboo, and wool.
What you wear on your feet to walk or run can also be an issue. “Check that your shoes don’t contain metal in the soles,” said Winge. “Worn-out rubber soles can also cause static. If needed, apply an anti-static spray to your clothing or around the treadmill.”
Are You Grounded?
Or really, is your treadmill cord plugged into a grounded wall outlet? Not only does a grounded wall outlet (recognizable for its three-pronged slots) prevent you from getting shocked, it also ensures machine protection by preventing inner damage from unexpected surges.
Your Treadmill Is High Maintenance
Besides making sure you’ve properly plugged in your treadmill cord, there’s also the usual upkeep if you’re a proud treadmill owner. For instance, maybe you’ve already developed a daily moisturizing routine before reading this article, but when was the last time you lubed your treadmill belt? According to Winge, a clean, well-lubricated belt reduces friction and static buildup. Lubricating the belt every three to six months, or every 150 miles, will keep it in optimal condition.
A mat made of rubber, PVC, or foam helps the motor compartment stay free of dust and debris, especially if your gym area is carpeted. It also helps reduce noise, vibration, and scratches if your treadmill is on a hardwood floor, and dissipates electrical charge.
Invest in a Humidifier
It really could just be dry air. Winter saps the moisture from air and lowers humidity, creating shocking results while engaged in indoor workouts—and petting your cat. A humidifier in the same room as your treadmill set to 40 to 50 percent humidity reduces static charge.
Shock Therapy: Testing Three Cheap Solutions
I decided to give some of the anti-shock remedies a test. I tried the easiest and cheapest solutions and found that some were more practical than others.
Anti-Static Wristband: I used Arctic Eagle’s Anti-Static Wrist Strap Band. For the wristband to work, the clip has to be attached to a metal part of the treadmill. Finding exposed metal on the frame proved to be an impossible task, unless you wind the cord around the metal heart rate sensors. The clip didn’t remain attached to a bolt below the frame once I started pumping my arms.
I ended up clipping the cord to a metal piece under the belt and attaching the Velcro wristband to my ankle. I was surprised how it stayed secure, even when I dialed up the pace to 7:30. Even though the clip didn’t detach, I knew my gait pattern was getting messed up with my ankle tethered to the cord.
Verdict: The wristband felt the least feasible for runners, especially since you have to attach the clip somewhere on the treadmill. While you could try a cordless anti-static bracelet, it seems this version isn’t as effective as one with a cord.
Cotton Apparel: I wore a 100-percent cotton t-shirt in my drawer given to me by a local high school running coach. I was surprised many of my other cotton shirts had a small percentage of polyester.
Verdict: I haven’t run in cotton since high school cross country practice, circa 2006. Unless you like seeing sweat stains, this is a pass. But I didn’t get zapped.
Skin Lotion: I slathered on CeraVe and it was freeing not having to strap myself to the treadmill or wear a slightly rough cotton tee. I applied the lotion to my face, arms, and legs.
Verdict: Of the three methods, this one was by far the easiest, but you’ll have to constantly re-moisturize yourself throughout your workout. Fifteen minutes after smearing on lotion, I got a light shock touching a dial.
Final Word: With all this said, your best bet is calling dibs on the treadmill closest to the wall (plugged into a grounded outlet) or perhaps just accepting you’re going to get zapped. One thing I noticed as I subjected myself to this experiment is that most of the time I got shocked was when I lightly brushed against the metal heart rate sensors. If you want to limit your chances, avoid touching those at all costs.
Products Used
Arctic Eagle Anti Static Wrist Strap
Amanda Furrer, Editor, Running Reviews, studied journalism at NYU and writing at Emerson College. She has reviewed gear and covered other topics in the running space for almost 10 years. Since 2013, she has consecutively run the Boston Marathon. She also has a master’s degree in gastronomy from Boston University and was formerly a professional baker for two years before hanging up her apron.
