Who says breaking a sweat has to be brutal?

Researchers have developed a “new strap-on vibrating device” that can trick the brain into thinking you’re putting in less effort while exercising.

And before your mind wanders — no, it’s not that kind of strap-on.

In a small new study , scientists from Canada and France recruited 15 healthy young volunteers and had them make two trips to a lab.

At each visit, participants pedaled for two 3-minute rounds on a stationary bike: one at a pace they felt was moderately difficult and another at a pace they felt was highly intense.

This is called perceived effort — a subjective measure of how hard a workout feels, rather than how hard it actually is.

During one visit, researchers strapped a vibrating device to participants’ Achilles and knee

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