Robotic exoskeleton boosts sprinting speed for runners

A new wearable exoskeleton helps runners sprint faster by encouraging them to take more steps and thus cover short distances faster. Unlike previous studies focused on reducing running energy expenditure, this research explores how wearable robots can enhance sprinting.

The exosuit, created by a team led by Giuk Lee, an associate professor at Chung-Ang University in Seoul, South Korea, features lightweight construction and steel cables powered by electric motors attached to the runner's thighs. These motors mimic muscular contractions, specifically helping to flex the hips, which helps propel the runner forward.

Sensors located on both thighs track the user's lower body movements in real time, and the resulting data is used by an algorithm for gait control that combines with other algorithms to adjust to the runner's unique style and speed.

The study involved nine young male runners who were briefly instructed in the use of the exosuit and then sprinted 200 meters with and without the suit. On average, participants covered the distance 0.97 s faster when wearing the suit, which correlated with an increase in step frequency and a decrease in sprint time.

Researchers are currently developing a customized exosuit for retired former elite national runner Kyung-soo Oh in an attempt to break the world record in the 100-meter dash.

Although the exosuit is promising for sprinters, experts warn that its use may not lead to improved performance because it does not strengthen muscles and may lead to an over-reliance on assistive technology.