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https://www.youtube.com/watch?v=3q113sGU19A
🎥 觀看我們關於完美蝴蝶技巧的視頻:#shorts 📲 MySwimPro 訓練應用程序:🏅 VIP Facebook 群組:🚀 7 天游泳更快指南:📚 像專業書一樣游泳:👕 獲取 MySwimPro 商品:🏊♀️ 購買游泳裝備:💨 Airofit’s Breathing Trainer with Code MySwimPro10 10% 折扣:
https://www.youtube.com/watch?v=3q113sGU19A
Why is it bad to go up and down, like isn't your body weight helping you to go faster when you swim a little bit down ?