Isometric Strength and Its Relationship to Dynamic Performance: A Systematic Review

Strength is a fundamental quality necessary in achieving optimal physical function and is defined as the ability to produce more force.(Siff M; Stone MH et al., 1993). Thus the display of strength has characteristics which include a magnitude, rate and direction. The force production can be measured by isotonic, isometric or isokinetic methods. The isotonic techniques require lifting a particular weight through a fixed number of repetitions such as 1RM testing or using prediction equations (Bryzcki, 1993). The Isokinetic measurements involve the use of isokinetic devices. The isometric testing is done by a maximal voluntary contraction performed at a specific angle against an unyielding resistance which in series with a strain gauge, cable tensiometer, force platform or similar device whose transducer measures the applied force (Stone et al., 2002).