Motivation in sport performance has been an interesting topic for many investigators during the past decade. This area can be considered from different viewpoints: motivation for participation in sport activity, achievement motivation, competitiveness etc. Motivation plays an important role in all out tests, as well as in sport activities and at all levels of competition. Motivation climate, or positive social environment may influence and modulate motivation of individuals involved in sports. Experience has shown that conventional encouragement and feedback during the test may affect its outcome. According to Wingate research team recommendations, verbal encouragement, as a motivation factor, was given to all examined subjects during Wingate anaerobic test, which is considered the most reliable test for assessing anaerobic capacity. The investigated group consisted of 30 young men--medical students, who were not actively involved in any programmed sport activity. The investigated group included second-year students of the Faculty of Medicine in Novi Sad chosen by random sampling. The Wingate anaerobic test was performed in all subjects, and changes of parameters when test was performed with verbal encouragement, were recorded The results show statistically significant increase of Wingate test parameters when conducted with verbal encouragement: anaerobic power (622/669 W); relative anaerobic power (7.70/8.27 W/kg); slope of the power (95.5/114 W/s); relative slope of the power (1.18/1.40 W/s/kg); anaerobic capacity (12.7/13.2 kJ) and relative anaerobic capacity (158/164 J/kg).

Kratak sadr`aj: Dobro je poznata ~injenica da su sport ist kinje sa neredovnim menstrualnim ciklusom izlo`ene riziku od smanjenja ko{tane mineralne gustine i posledi~no osteoporozi. Pra}enje nivoa biohemijskih markera ko {tanog metabolizma omogu}ava razumevanje dina m i ~kih promena tokom procesa remodeliranja kosti. Ciljevi spro vedenog istra`ivanja bili su: utvrditi prevalence men stru alnih poreme}aja na uzorku sportistkinja i kontrolne grupe, kao i odrediti nivoe markera ko{tanog metabolizma u grupama ispitanica sa menstrualnim disfunkcijama. Ispi tanice (n=117) bile su podeljene u dve grupe, ekspe rimentalnu (S) (n=84) podeljenu u tri podgrupe (34 sportistkinje igara sa loptom, 27 atleti~arki i 23 takmi~arke u sportskom plesu) i kontrolnu grupu (C) (n=34). Za odre|ivanje menstrualnog profila i poreme}aja menstrual nog ciklusa kori{}en je upitnik. Odre|en je nivo srednjeg fragmenta osteokalcina (N-MID osteokalcin) kao markera formiranja kosti i b-CrossLaps (b-CTx -marker resorpcije kosti) elektroluminiscentnom imunohemijskom metodom na automatskom aparatu Elecsys 1010. Primarna ame noreja na|ena je kod 7 (8,33%) a oligomenoreja kod 11 (13,09%) sportistkinja, {to je statisti~ki zna~ajno vi{a incidenca u odnosu na kontrolnu grupu. Vrednosti markera ko{tanog metabo lizma su pokazale statisti~ki zna~ajnu razliku u nivou mar ke ra resorpcije kosti, b-CrossLaps, izme|u grupa ameno rei~ nih i oligomenorei~nih sportistkinja u odnosu na eume no rei ~ne ispitanice, kako sportistkinje tako i kontrolnu grupu. Ubrzanu resorpciju je pratilo i ubrzano formiranje kosti (pove}ane Summary: It is a well known fact that sportswomen with irregular menstrual cycle are exposed to the risk of dimi nished bone mineral density, and consequentially osteoporosis may appear. Monitoring of the levels of biochemical markers of bone metabolism enables understanding of the dynamic changes during the bone remodeling process. The objectives of the conducted research were to determine the prevalence of menstrual dysfunctions in a sportswomen sample and a control group, and also to determine the levels of bone metabolism markers in groups of women with menstrual dysfunctions. The women (n=117) were separated into two groups, the experi men tal group (S) (n=84) comprised of three subgroups of sports women (34 women who play ball game sports, 27 athletes and 23 sport dancers) and the control group (C) (n=34). To establish the menstrual profile and dys function of the menstrual cycle, we used a very detailed questionnaire. The level of mid-fragment osteo calcin (N-MID osteocalcin) as a mar ker of bone forma tion was deter mined, as well as b-Cross Laps (bCTx-bone resorption marker) via the electro luminescent immunoche mistry method on an Elecsys 1010 automated machine. Pri mary amenorrhea was found in 7 (8.33%) and oligome norrhea in 11 (13.09%) sportswomen, which was statistically a much higher incidence (p<0.05) than in the control group (0/34). Values of bone metabolism markers showed a sta tistically significant difference in the level of the...