This AI-powered punching bag looks like the future of fitness

Léo Desrumaux was only a 16-year-old kid when his life changed. “I moved to the US as a foreign exchange student. I didn’t speak a word of English. I really didn’t have a lot of confidence in myself. I was a little bit lost,” he tells me in a video interview. “Then I found myself through boxing.” Sixteen years later, Desrumaux discovered digital fitness and embarked on a quest to recreate the boxing training experience at home. The result is Growl, a device that turns a punching bag into an...