Google: The average plank time varies by fitness level, with most beginners holding for 30-60 seconds, intermediates for 1-2 minutes, and advanced individuals for 2-3 minutes or more, while the general average for adults often falls around one minute, but elite performers can hold planks for significantly longer, with some exceeding 10 minutes
我把目標定在3, 到3的時候,腰,腿,腹有感覺了, 隻是 elbow 的皮膚和骨頭感覺有些疼(在硬 area rug 上)。 估計得用軟墊子才能多幾分鍾。
(好像李醫生說做過 10 分鍾,遙不可及的感覺)