Stepping onto the treadmill to log another mindless 30-minute jog might sound like the most unappealing way to spend a workout — so don’t waste your time. Instead, cut your running time in half and ramp up the intensity with this curved tread, specifically designed for sprinting.

Better yet, the motor-free machine is built to be powered by your strides. There’s no max speed, either, so try your best to push it as hard as you can during sprint interval workouts.  

Think you can handle the speed? Try this workout: Perform a 15-second sprint as fast as you can, and then rest for 15 seconds. Keep your chest high and your core braced the entire time you’re running. That’s 1 round. Do 40

Don’t just run the same mindless miles on a nondescript treadmill. Instead, tune into top trainers for guided interval workouts that will also take you off the track to use free weights.

The high-tech X22i Incline Trainer treadmill offers a shock-absorbent running surface, a 40 percent incline, and over 12,000 guided workouts on demand. You might get tired of running — but you’ll probably never get bored.