40.2 MB (2.4 MB compressed)
3752 x 3749 pixels
31.8 x 31.8 cm ⏐ 12.5 x 12.5 in (300dpi)
CRISTINA PEDRAZZINI / SCIENCE PHOTO LIBRARY CRISTINA PEDRAZZINI / SCIENCE PHOTO LIBRARY
Woman using an exercise ball (Swiss ball) to do sit-ups. A variety of exercises can be performed with this piece of equipment. It is used in the Pilates exercise system.
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