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Dietary supplements in sport nutrition
BOČAN, David
Thesis deals with dietary supplements and their use by amateurs and professionals.The theoretical part is in the 1st part devoted to supplements and their legislation,forms and division.To the 2nd part was selected substances used by athletes and further discussed in terms of their function and effects on the organism.Within the general information was drafted in the 3rd part risks related to the use of dietary supplements due to wrong dosage or concentration and the issue of doping. Research was conducted through a questionnaire survey among professionals and amateurs.Questionnaire was created on the server google.cz and distributed in electronically and printed form.Respondents were south in several ways.There were used personal contacts and sending questionnaires to sport clubs.Research group contained 166 respondents-83 amateurs and 83 professionals.For evaluation were used basic statistical tests-pivot tables and chi-square test.The processing of results was made in Microsoft Excel 2013. Besides aims to map the use of supplements by athletes were expressed two hypotheses. The 1st hypothesis: There are statistically significant differences in knowledge of supplements between amateur and professional athletes.The 2nd hypothesis:There are statistically significant differences in the use of supplements between amateur and professional athletes. The 1st hypothesis was rejected.There were no statistically significant differences in knowledge of supplements between amateurs and professionals.The 2nd hypothesis was dealt separately for four seasonsfor the period of preparation before exercise/after exercise and for the period of the season, again before exercise/after exercise.In periods of preparation (before and after exercise) and after exercise in the season, there were statistically significant differences in the use of supplements between amateurs and professionals. In these cases 2nd hypothesis was confirmed.In the period of seasonbefore exercise was hypothesis rejected. In this period was no statistically significant differences in the use of supplements between amateurs and professionals. In the next question they were asked about learning about supplements.Most of the information were received from teammate/colleague. In the next part were surveyed effects of various factors for the purchase of supplements on a scale of 0 points (least)-10 points (most influence). Price is a factor that rather affects athletes but more the group of amateurs.Quality has a great influence on both groups. The country of origin is a factor which has by amateurs the largest representation at the point 0. Professionals find it like rather affecting. Brand name is a factor in both groups rather affecting. The package (label) doesn't rather affects athletes,more on amateurs. Recommendations known and previous experience are important for both groups of athletes.The influence of habit is not clear, almost all points are represented by the same ratio of votes. Discount and advertising are factors that affect athletes rather not.Influence expert forums and reviews on amateurs is not clear, professionals voted the most mean value. The most common reasons for using supplements are for both groups regeneration, energy source,adding vitamins and joint nutrition.Amateurs monthly invest in the purchase of dietary supplements less (500 CZK),professionals 500 or 1000 CZK. The most preferred forms of supplements are tablets,powders,capsules and liquids,including beverages.Sticks and gels are used more by professionals. Most of respondents use supplements by recommendation exactly or rather. The most common place of purchase supplements are for professionals specialized stores and for both groups also the Internet. Thesis could serve as an information resource for athletes to clarify that dietary supplements should take depending on what they want to achieve.Also it could be used as study material for courses dealing with nutrition and sport.
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