How a Muscle Contracts | Muscle Physiology 101

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Replying to @Sam Pepper Campos et al., 2020 — Different Shoulder Exercises Affect Activation of Deltoid Portions McAllister et al., 2013 — Muscle activation during dumbbell lateral raise variations Signorile et al., 2007 — Electromyographic analysis of shoulder muscle activation during different exercises Boettcher et al., 2009 — EMG activity of shoulder muscles during elevation exercises Reinold et al., 2004 — Electromyographic analysis of the rotator cuff and deltoid musculature during shoulde