Journal of bodywork and movement therapies · 2026
Brachiation-based movement as a theoretical framework for addressing technology-related postural dysfunction: An evolutionary and neuromuscular perspective.
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Ishibashi Ryuhei Franny
Аннотация
BACKGROUND: Technology-related postural dysfunction, characterized by forward head posture, thoracic hyperkyphosis, and scapular dyskinesis, represents a growing public health concern. Upper Crossed Syndrome (UCS)-a pattern of muscle imbalance involving overactive upper trapezius and inhibited lower trapezius, serratus anterior, and deep cervical flexors-is prevalent among desk workers. While rehabilitation protocols targeting individual muscles exist, an integrated framework addressing the evolutionary origins of this dysfunction remains underdeveloped.
OBJECTIVE: This theoretical paper proposes that brachiation-based movements-particularly unilateral hanging with oscillatory perturbation-may offer a biomechanically optimal approach for addressing UCS and related postural dysfunctions by restoring muscle activation patterns consistent with our evolutionary heritage.
METHODS: A comprehensive review of electromyographic (EMG) literature on trapezius, serratus anterior, rotator cuff, and deep cervical flexor activation during various exercises was synthesized with evolutionary biomechanics research on human brachiation capacity.
RESULTS: EMG evidence demonstrates that overhead movements and pull-up exercises preferentially activate lower trapezius (45-56% MVIC) and serratus anterior while minimizing upper trapezius dominance. Critically, unilateral hanging with body oscillation theoretically induces rotational perturbations that trigger feedforward activation of deep rotator cuff muscles (subscapularis: 37% MVIC; infraspinatus: 28% MVIC in perturbation studies), potentially addressing deep stabilizer dysfunction inaccessible through conventional exercise.
CONCLUSIONS: Brachiation-based exercise presents a theoretically coherent approach to UCS rehabilitation that addresses multiple muscle imbalances simultaneously through evolutionarily congruent movement patterns. Empirical validation through randomized controlled trials measuring EMG outcomes is warranted.
OBJECTIVE: This theoretical paper proposes that brachiation-based movements-particularly unilateral hanging with oscillatory perturbation-may offer a biomechanically optimal approach for addressing UCS and related postural dysfunctions by restoring muscle activation patterns consistent with our evolutionary heritage.
METHODS: A comprehensive review of electromyographic (EMG) literature on trapezius, serratus anterior, rotator cuff, and deep cervical flexor activation during various exercises was synthesized with evolutionary biomechanics research on human brachiation capacity.
RESULTS: EMG evidence demonstrates that overhead movements and pull-up exercises preferentially activate lower trapezius (45-56% MVIC) and serratus anterior while minimizing upper trapezius dominance. Critically, unilateral hanging with body oscillation theoretically induces rotational perturbations that trigger feedforward activation of deep rotator cuff muscles (subscapularis: 37% MVIC; infraspinatus: 28% MVIC in perturbation studies), potentially addressing deep stabilizer dysfunction inaccessible through conventional exercise.
CONCLUSIONS: Brachiation-based exercise presents a theoretically coherent approach to UCS rehabilitation that addresses multiple muscle imbalances simultaneously through evolutionarily congruent movement patterns. Empirical validation through randomized controlled trials measuring EMG outcomes is warranted.