A clinician investigating a muscle injury will usually start the exam with questions about the patient’s medical history and how they think the injury occurred. The clinician might then place their hands on the injured area and ask the patient to move around. Often, the only quantitative data collected in the process come from asking the patient to use a pain scale from 1 to 10. Compare that to the routine for treating a fever or high blood pressure. A doctor or nurse can run a simple test and quantify…