Upper extremity insults caused by single stress or by repetitive microtrauma occur in a large variety of sport or professional activities [1,3,21,22,24,32]. Among these injuries, lateral epicondylitis could result from excessive use of the wrist extensor and forearm supinator muscles [7,12–14,27]. Isokinetics has been increasingly used for strength measurement of muscle groups with tendon disorders with the aim of interpreting the mechanical profile of the muscle and to assess treatment effects [7,15,16]. Dynamometers also allow eccentric training in patients with chronic tendinitis [7,17,34]. Nevertheless, the ability to accurately assess muscular strength in testing situations appears fundamental and normative data remain vital in order to interpret pathological cases, particularly of a unilateral type [25,28,30,31]. Relatively little is known about isokinetic profiles of the wrist muscles. Kramer et al. [26] examined the reliability of isometric pronation and supination measurements using two dynamometers. Friedman [15] compared isokinetic peak torques in symptomatic and asymptomatic lateral epicondyles of women using a single speed test protocol (concentric 120◦.s−1 mode). Frobose et al. [16] tested the wrist extensors and flexors in the concentric mode. Nevertheless, no comprehensive isokinetic assessment of the forearm and wrist muscles (in the concentric and eccentric modes through