Stock photo: Swiss ball back extension
Stock photo: Step by step instructions for abs: Lie facedown on a Swiss ball, hands straight ahead, feet against a sturdy object. (A) Squeeze your glutes and lift your torso up until your body forms a straight line. (B)
Stock photo

#5583297 Swiss ball back extension by blanaru Stock photo blanaru

XXL JPG 5149 x 4298 pixels
17.2" x 14.3" | 43.7 cm x 36.3 cm @ 300dpi JPG
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