Jetpack that helps runners move faster while spending less energy





Enter Arizona State University engineering student Jason Kerestes and his 4MM (4 Minute Mile) project, which gives runners the speed boosts they need to get to 15 mph by attaching a jetpack to their lower backs for instant thrust. Because Kerestes wants to propel people forward instead of up into the sky, the 4MM jetpack thrusters feature dual-jet nozzles that face behind the runner to propel movement.

The dual jets on the jetpack generate continuous thrust that helps runners move faster than they could on their own, all while reducing their metabolic energy expenditures. The prototype jetpack itself was built in Kerestes' own welding shop, and uses lithium batteries attached to fans to shoot bursts of air for propulsion.

The 4MM project is still in the testing phase, but initial results are promising. One of the study's test subjects ran an unassisted mile in 5 minutes and 20 seconds, and ran it in just 5 minutes and 2 seconds (a 5.625 percent decrease) with the 4MM. The same subject also experienced a 10-12 percent improvement during a 200-meter sprint, shaving a full 3 seconds off his time despite wearing the 11-pound pack.
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