サラ・ショーストレムのインスタグラム(sarahsjostrom) - 3月31日 18時07分

This drill is great for breaststrokers but also for butterfly. Try to keep a strong body position and focus on working forwards in each stroke! #sarahsdrilloftheweek ??‍♀️ Thanks to @jennieswim for advise ? (try it with and without fins?)

[BIHAKUEN]UVシールド(UVShield)

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