PAN-FU KAO2026-10-162026-10-161998-01-01Pure ID: 15369955Pure UUID: 712e1c22-2989-4c2d-ad3b-a9d9dfa6139110.1136/bjsm.32.3.253https://www.scopus.com/pages/publications/0031668617https://scholars.csmu.edu.tw/handle/123456789/29786Uptake of technetium-99m methylene diphosphonate by the rectus abdominis muscle was unexpectedly found in a 29 year old man who had started to perform 30 to 40 sit ups a day for five days before the bone scan. After a week of rest, serum creatine kinase activity was still abnormal but muscle uptake of technetium-99m methylene diphosphonate had ceased. This specific muscle injury after short term sit ups as well as the resolution of the phenomenon within a week are of interest.2enjournal article