Everyone remembers the rope climb from gym class, but probably not too fondly. So you might not like what I’m about to tell you: It’s time to grab a rope again.

Instead of dangling from the ceiling, however, this one’s anchored to the ground, and your job is to grasp the other end and heave it up and down.

It doesn’t sound too challenging, but try telling that to your heart and lungs – not to mention your arms, shoulders, back, abs and legs – after a few seconds. They’d argue if they weren’t so tired.

Get ready for rope burn, because this combination of strength training and low-impact cardio is probably headed to a gym near you, if it’s not there already.

If you want someone to blame, look to John Brookfield, a North Carolina-based strongman who’s known for dragging trucks, ripping up decks of cards and bending nails. About five years ago, he was searching for a new feat and came up with the idea of creating continuous waves with ropes, which turned out to be a challenge even for him.

“If you lift a weight, as it comes down, you can use momentum,” he says. “With ropes, it’s all pure output. There’s no lull in the action.”

There’s no rest for a single muscle, either, as the whipping motion requires you to fight against your own power. Not only do you need to generate the energy to create ripples, you also need to stabilize your body or you’ll topple over.

Brookfield found he could make the motion even more exhausting by using two ropes and dueling a fit friend who held on to the opposite ends.

Quickly, Brookfield noticed his rope experiments were boosting his performance in exercises including running and push-ups. So he gave his invention the name Battling Ropes, started presenting the product, and soon got it into the hands of National Football League teams, Ultimate Fighting Championship fighters and Olympic athletes. And then folks like you and me.

Although the wave motion can challenge even a fit athlete, anyone – including children, seniors and people in wheelchairs – can do it, as long as it’s modified with smaller ropes, less intense waves or a slower pace.

That’s what drew Adam Wharton, the Washington-area fitness director for Bally Total Fitness, to Brookfield’s program a little more than two years ago.

“It can’t be more intense than you can make it,” says Wharton, who set about training his staff on the exercise.

At about the same time Brookfield was messing around with ropes in his back yard, Anthony DiLuglio, founder of the Punch Gym chain based in Rhode Island, had a chat with a friend about relieving anxiety. The pal, a former Israeli Special Forces officer, recommended “undulating” objects, like they used to do with towels in the desert.

DiLuglio gave it a try with hoses, chains and then the climbing ropes he had in the gym. With that, he stumbled across the same benefits Brookfield had discovered and launched his own program, Ropes Gone Wild.

“If people see you doing it, they can’t wait to try it. They’re looking at something that doesn’t look hard. It looks fun,” he says.

So he’s made Ropes Gone Wild the cornerstone of his Stop the Obesity program for schools while promoting it for adults in classes he’s rolling out to gyms nationally.

Marvin Aronson, a trainer with the Washington-area chain Sport & Health, also came up with a rope-whipping regimen a few years back.

When he worked at a farm, he would regularly lug ropes to pitch tents. He used that as inspiration to tone up personal training clients and soon added the moves to a circuit training class he developed called the Spartan Workout.

Other stops include slamming sledgehammers into tires and dragging weighted bags across a basketball court. But Aronson says those ropes are special: “Even at 30 seconds, you get a great cardio effect.”

When Lisa Wheeler developed Whipped!, a class incorporating ropes for the high-end national gym chain Equinox, she knew she’d have to limit students to short intervals. Still, “they see results,” she says. “That’s the best thing. They feel their heart rates going up.”

So where will this rope climb lead? Wharton said he expects every gym will eventually have a few on hand, as they become staples like stability balls. And more people will be faster and stronger because of it.