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Looking for better cardio workouts at the gym?

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AJ_Watt/Getty Images; Graphic by Margaret Flatley

We’ve got your back.

That’s because there’s a glass of rose waiting for you at your post-workoutbrunch with friends.

But there’s an unspoken secret third rule that most of us live bythe workouts need to be interesting.

Otherwise, gym time gets boring fast.

So next time you’re walking near one, well, keep on walking.

Repeat until you hit the 20-minute mark.

A few moves that get your heart rate up includesingle-leg burpeesandmountain climbers.

And here’s asupercharged total-body TRX routine.

Never used a TRX before?

(Hint: Pinch the metal attachment and slide up or down.)

And remember to keep your core tight with each move you perform.

“So the faster you pedal, the more resistance you get and that really engages your muscles.”

That said, pedaling is only one part of the equation.

Want to give it a go?

After a light warm-up, tackle this pyramid workout he put together.

But it’s also one of the most effective tools you’ve got the option to find.

“Performing exercises back-to-back with it is one of the most metabolically-challenging ways to train.”

There’s a reason pro athletes use thisbrutal conditioning tool: It worksfast.

Proof: Here’sHilary Duff doing the workoutlike a boss.

Not to mention your explosive leg power will skyrocket once you work the sled into your regular training routine.

But that means you’re going to burn more calories.

Switch the sandbag to the other shoulder and repeat.

Here’s an excellenttotal-body sandbag routineyou can try the next time you’re at the gym.

Or, for a more demanding cardiovascular exercise, try asandbag burpee…oh yeah!

Related:10 Weird Gym Tools Explained