A standard method of shoulder strength measurement for the Constant score with a spring balance.

摘要: Abstract The strength component of the Constant score has been criticized for its lack a precisely defined measurement method. A series experiments was performed to compare three different methods in normal and pathologic shoulders with use standard test position. These were (1) Isobex isometric dynamometer, (2) Constant's unsecured spring balance, (3) new modification which balance is fixed at one end reading taken after 5 seconds maximum effort. results suggest that this simple low-cost can give similar values those from Isobex. need precision terms definition method discussed, recommendations standardization many variables making are made. (J Shoulder Elbow Surg 1998;7:116-21.)