SLOVAK JOURNAL OF SPORT SCIENCE 2021ARCHIVE OF ONLINE ISSUES » SLOVAK JOURNAL OF SPORT SCIENCE 2021 Slovak Journal of Sport Science 2021 vol. 7 No. 1 2021ISSN 2453-9325 (online)Published 30.6 2021 Editorial Dávid Líška Editorial Comparison of an athlete training for 400m hurdles - Case report Daniela Ledecká, Miroslava Rošková Comparison of an athlete training for 400m hurdles - Case report Cognitive evaluation of subjective well-being among healthy women with the different sport participation level Dagmar Nemček Cognitive evaluation of subjective well-being among healthy women with the different sport participation level Effects of slackline training on elements of physical fitness: a systematic review with meta-analysis Bartłomiej Wachowicz, Sebastian Rutkowski Effects of slackline training on elements of physical fitness: a systematic review with meta-analysis Changes in the activity of selected muscles during deep squat correction Samuel Králik, Denis Freundenfeld, Daniel Gurín Changes in the activity of selected muscles during deep squat correction T-test for two dependent samples – some practical notes Erika Liptaková T-test for two dependent samples – some practical notes Injury in ice hockey players Jozef Kováč Injury in ice hockey players Percentage of subcutaneous fatty tissue as an indicator of the physical status of volleyball players Ratko Pavlovič , Vladan Savič , Nikola Radulovič Percentage of subcutaneous fatty tissue as an indicator of the physical status of volleyball players Review of book “Základy klinického výskumu“ Dávid Líška Book review "základy klinického výskumu" Low carbohydrate diets and sport Jan Vyjidák Low carbohydrate diets