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Subject positioning for isometric gastrocnemius contraction in prone. The participant was prone, shoes off with feet hanging unsupported off edge of the couch, and knees resting in 0 degrees extension. The trunk and lower extremities were anchored to the table by a strap just above the popliteal crease and across the pelvis at the level of the greater trochanters. The ankle position was maintained at 0 degrees neutral.
