Which type of resistance is harder to quantify due to therapist involvement?

• A. Manual resistance
• B. Mechanical resistance
• C. Elastic resistance
• D. Bodyweight resistance

Answer: (A)

Manual resistance is harder to quantify because the force comes from the therapist and can vary in real time. The therapist can adjust direction, speed, pressure, and the patient’s position as the movement is performed, so there isn't a fixed, repeatable load to measure. In contrast, mechanical resistance from machines or weights provides a defined load, elastic resistance from bands offers a known resistance profile for a given tension and length, and bodyweight resistance depends on gravity in a consistent way once the position is set. Therapy contexts often rely on subjective judgments for manual resistance unless specialized devices (like dynamometers) are used, making its exact quantification more challenging.