你是one arm 20 or two arms 20? Not bad for 20 with two arms

來源: 於 2025-01-08 11:03:02 [舊帖] [給我悄悄話] 本文已被閱讀：次

我們有時做一個drill 叫 - Stroke and Time, 遊 50yard 的時間和 total stroke 相同。for example, swiming for 50 yard uses 50 seconds and 50 strokes(counting both arms)