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Clinical assessment of muscle function provides important clinical information to help with diagnosis and treatment of patients affected by a variety of neuromusculoskeletal disorders. 1, 2 In the clinical setting, muscle force output can be measured using handheld dynamometers (HHDs). 3, 4 However, the measurements obtained with HHDs are commonly misrepresented and/or misinterpreted. 5 Reporting the raw force values measured using HHDs as the muscle force, is a misconception. To accurately report muscle force output, the force applied to the HHD needs to be multiplied by the length of the lever arm used to apply the resistance to the limb, and be expressed as a torque or moment of force as determined by the following equation,