HighlightsThis manuscript presents the measurement properties of a novel technique for lengthening the pectoralis minor muscle.Active and passive lengthening procedures resulted in greater changes in pectoralis minor muscle length when compared to previously reported pectoralis minor muscle stretches.This investigation provides the first evidence to support measurement of the extensibility of the pectoralis minor muscle.

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Although resting pectoralis minor muscle length differed between groups, pectoralis minor muscle lengthening and scapulothoracic motion were similar between participants with short and typical resting pectoralis minor muscle length. Additional studies are needed to better understand the role of pectoralis minor muscle elongation on scapulothoracic motion.

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