SHOULDER MUSCLE EMG AND RESISTING MOMENT DURING DIAGONAL EXERCISE MOVEMENTS RESISTED BY WEIGHT-AND-PULLEY-CIRCUIT

  • 1 January 1978
    • journal article
    • research article
    • Vol. 10  (4) , 179-185
Abstract
An investigation of which muscles contract (and to what extent) during diagonal shoulder movements resisted by a wt-and-pulley-circuit and the relationship between the calculated resisting moment of force and the maximum voluntary isometrical muscular moment was studied. EMG (electromyography), mechanical calculations and measurements of moments of force were used. With the resistance used in the study, flexion-abduction-external rotation (FLABER) highly activated all 3 parts of the deltoideus muscle and the infraspinatus. Flexion-adduction-external rotation (FLADER) highly activated the anterior and middle parts of the deltoideus, infraspinatus and moderately the sternocostal part of the pectoralis major. Extension-abduction-internal rotation (EXABIR) highly activated the posterior deltoideus and moderately the latissimus dorsi. Extension-adduction-internal rotation (EXADIR) highly activated the sternocostal part of the pectoralis major.