It's a reflex ball. The idea is like paddleball, except you punch the Boxbollen ball with your fists. The ball is on a string attached to a headband that you wear. Kids can play it, adults can play it ...
A new fitness trend has taken off on TikTok — and this time, it’s celebrity-backed, rhythm-based workout Boxbollen. Using just a ball attached to a headband (yes, it really is that simple), you can ...