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Table 2 The locations of electrodes and MVIC positions

From: The effectiveness of a comprehensive corrective exercises program and subsequent detraining on alignment, muscle activation, and movement pattern in men with upper crossed syndrome: protocol for a parallel-group randomized controlled trial

Muscle Electrode location MVIC position
Upper trapezius The halfway point between the spinous process of the seventh cervical vertebra and the acromion In a sitting position with abduction at 90°
Middle trapezius The halfway point between the scapular medial border and the T3 In a prone position with horizontal abduction at 90° and external rotation
Lower trapezius At 2/3 on the line from the trigonum spinea to the T8 In a prone position with horizontal abduction in 120° in line with the fibers of the muscle and the thumb pointing upward
Serratus anterior In the mid-axillary line over the fifth rib In a sitting position with maximum resistance given to upward rotation of the scapula with the shoulder flexed
Middle deltoid The halfway point of the acromion and the deltoid tuberosity In a sitting position with abduction at 90°