What Should You Know About the Humac Norm Isokinetic Dynamometer?

The person sits or lies in a carefully adjusted position while a limb is secured to the machine. The system controls the movement speed as the person pushes or pulls, allowing the clinician to record force through a selected range of motion. Testing may compare the involved side with the other side or examine performance at different movement speeds.

The result is one part of an assessment, alongside pain, swelling, range of motion, movement quality, strength in daily tasks, and your goals. The test should be explained beforehand, and the setup must be adjusted for your height, joint, surgical precautions, and comfort.

Tell the clinician about recent surgery, injury, pain, dizziness, medication changes, and any movement restrictions. Wear clothing that allows the joint to be positioned safely and follow the warm-up instructions. Push only as directed; sharp pain is a reason to stop and report what you felt. Ask how the findings will change your exercises, loading plan, or return-to-sport milestones.

Tell the clinician immediately if testing causes sharp pain, a giving-way feeling, unusual numbness, marked swelling, or symptoms that do not settle as expected. Seek medical advice for persistent worsening pain, new weakness, or loss of movement after the session. Testing should be postponed or modified when the joint is not ready for resisted movement.

Ask what muscle or joint is being tested, what the machine can and cannot show, and how the position will protect your healing tissues. Clarify how results will be compared over time, which exercises follow the test, and what criteria guide a return to sport.