Extensor Pollicis Brevis and Longus

Extensor pollicis brevis and longus are muscles which are recruited during the extension of the wrist and the thumb.

Having a high population of slow twitch fibres, the extensor pollicis brevis and longus would may be best trained using a higher repetition range. It is little wonder why such a heavily used muscle has an abundance of slow twitch fibres, contracting many time during the day to perform gripping and other activities.

Extensor Pollicis courtesy of Fitness Uncovered - Bodybuilding & Fitness

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