エリー・ブラックのインスタグラム(ellieblack_) - 1月5日 05時07分

Working on balance, strength and stability with this exercise. Holding a good plank body position with strong core and shoulder muscles engaged. Opposite arm and leg lifted off the ground. Much harder than it looks! #TheGrind ??

[BIHAKUEN]UVシールド(UVShield)

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