The Effects of Dynamic Range of Motion Exercises and Static Stretching on Strength and Range of Motion of the Hip Joint

Efficiency of movement is dependent upon norm ranges of motion. Physical educators and physical therapists, therefore, have done a considerable amount of research in developing effective programs through which flexibility can be gained. It is a commonly and generally recognized belief that flexibility is an important factor in human performance, as well as an essential component of physical fitness. Evidence indicates that maintenance of good joint mobility decreases the incidence of injuries in athletics, and consequently is of concern to the physical education profession. Numerous stretching techniques have been developed to produce greater range of movement in joints, and have resulted in pronounced improvement. The three most common modes used to improve flexibility are ballistic methods, static stretch techniques, and proprioceptive neuromuscular facilitation (PNF). All methods have shown significant increases in range of motion. Static exercises are believed to be the safest method of the three, as recent studies indicate that a greater chance of tissue damage may occur with the ballistic and PNF exercises. Dynamic range of motion training (D\u27ROM) is designed to improve range of motion by developing strength of contraction over a full range of motion, an already accepted value. Because these exercises develop strength and flexibility simultaneously, they are thought to be a more efficient mode of stretching. D\u27ROM exercises are also viewed as a safer technique since the exercises never exceed the ligamentous capability of the joint. Consequently, the stability of the joint is never threatened. To date, no research has been conducted to study the effects of the D\u27ROM exercises. The major focus of this study was to compare the effects of static stretch exercises and dynamic range of motion exercises on hip flexibility and hip strength. The relationship between hip flexibility and hip strength was also examined