The key to propulsion that creates fast swimming

Is this what kicking is like? A comfort I've never felt while swimming😪😪 Zero burden from kicking!

I'll show you how it feels to float on water👀 Strong lower body | Muscular body | Surin, come on in

수린이 특징) 힘 빼라는 말 들으면, 긴장해서 힘이 더 들어감