Figure 1.

Setting of the manual muscle test (MMT) of the hip flexors with fixed leg including the handheld device. The assistant’s leg is fixed against the wall to ensure a stable position also after repeated trials. The tester’s forearm is in a rectangular position to the rectus femoris muscle. The handheld device is located between the tester’s hand and the assistant’s distal thigh to measure the force profile produced by the tester. On the right side, the handheld device with two adapters is illustrated: one for the palm of the tester (white) and one for the limb of the patient (black), which is shaped according to the contours of the limb. Between the adapters, the sensor technology is placed. Dimensions of the handheld device are given in mm.