Change of direction (CoD) ability is critical for the success athletes in many sports. The purpose this study was to perform a principal component analysis using 9 CoD tests order reveal possible subcomponents ability, which could aid practitioners test selection. Male and female kinesiology students (n = 76) performed all 30-m sprint quasi-randomized, counterbalanced order. Three components ma...

©FSRH J Fam Plann Reprod Health Care 2009: 35(3) Background There is no doubt that the combined oral contraceptive pill (COC) has revolutionised and changed women’s lives for the better. With the discovery of progestogens in the 1940s/1950s, and the realisation that the accidental addition of synthetic estrogen [mestranol – the inactive precursor of ethinylestradiol (EE)] improved bleeding patt...

Background. Instead of different measurements of physical performances such as postural control, strength, and flexibility, studies investigating many abilities such as the harmony between these abilities and body segments simultaneously with the test FMS results and different physical relationships were performed. Meaningful results and other relationships between COD, FMS, and PC have previou...

a new dynamic friction model for modeling of elliptical vibration assisted turning (evat) was developed in this research. the periodic change of the friction force direction is known to be one of the most important causes of this phenomenon. in modeling of machining processes (including the evat process), static coulomb friction model was employed by most of the researchers. because of the peri...