Fischer and Whitson during Sprint Experiment OPS

iss051e037012 (May 3, 2017) --- Flight engineer Jack Fischer dons Thigh and Calf Guides in preparation for Ultrasound 2 operations for the Integrated Resistance and Aerobic Training Study (Sprint) experiment. He is assisted by Commander Peggy Whitson. Image was taken in the Columbus European Laboratory.

Photographer Thomas Pesquet