@swimsuccess: Your legs have tons of slow-twitch endurance fibers because you walk every day. Your upper body doesn’t. In swimming, the arms do the work, and for most adults those muscles are not built to last. ⚠️ Add inefficient technique on top of that, and every stroke costs too much energy. That’s why swimming feels brutal so fast. 📈 There are no shortcuts here. You need two things at the same time. Better technique so each stroke is cheaper, and progressive endurance so your upper body slowly adapts. 🚀 Inside the Swim Success app, this structure is already built for you. No guessing, no random workouts. And right now, it’s completely free. Hit the link in our bio and start training the right way.