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The Effect of 4 Weeks of Strength Training and Beta-Alanine Supplementation on anaerobic Power and Carnosine Level in Boxer Players

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Journal of Science in Sport and Exercise 2023年第1期5卷 62-69页

作者： Khalid Alabsi Amir Rashidlamir Elham Hakak Dokht Department of Exercise Physiology Faculty of Sports SciencesFerdowsi University of MashhadMashhadIran Department of Sport Training Faculty of Sport EducationTishreen UniversityLattakiaSyria

Purpose The objective of this study was to investigate the effect of 4 weeks of strength training with beta-alanine supple-mentation on anaerobic power and carnosine level in boxer *** Eighteen male boxer players participated in this study,randomly divided into two homogeneous groups(strength training+beta-alanine and strength training+placebo groups).The study design was double-blind,parallel,and *** anaerobic Wingate test was performed by athletes before and after the intervention period(4 weeks).Par-ticipants received 0.3 g/kg of body mass of the supplement(maltodextrin or beta-alanine)per day during the *** were also evaluated for anaerobic power,serum level of carnosine,and blood lactate before and after 4 *** Average power in both groups was significantly increased compared with pre-intervention,but fatigue index was significantly decreased only after beta-alanine supplementation;however,there were no significant differences with either average power or fatigue index between the beta-alanine and placebo *** was no significant difference in the interaction between the groups and time,as well as no significant difference between groups for lactic *** level in both groups was significantly increased compared with *** changes in serum carnosine for the two groups were examined,statistical analysis showed a significant difference between the beta-alanine and placebo *** Four weeks of strength training accompanied by beta-alanine supplementation had a likely beneficial effect on boxer players'anaerobic performance and carnosine level.

关键词： Resistance training anaerobic performance Boxing Carnosine Beta-alanine

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Effect of High-Intensity Intermittent Hypoxic Training on 3-on-3 Female Basketball Player’s performance

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Journal of Science in Sport and Exercise 2022年第4期4卷 386-396页

作者： H.K.Smith M.J.Hamlin C.A.Elliot Department of Tourism Sport and SocietyLincoln UniversityChristchurchNew Zealand Faculty of Health and Environmental Science Sports Performance Research Institute New Zealand(SPRINZ)Auckland University of TechnologyAucklandNew Zealand

Purpose To investigate the effects of 4 weeks high-intensity interval training in hypoxia on aerobic and anaerobic perfor-mance of 3-on-3 basketball *** In a randomised controlled trial,15 female basketballers completed eight 1-h high-intensity training sessions in either normobaric hypoxia(hypoxic group n=8,altitude 3052 m)or normoxia(normoxic group n=7,sea-level).Results After training,the hypoxic group increased their 1-min all-out shuttle run distance by 2.5%±2.3%(mean±95%CI,d=0.83,P=0.04),compared to the normoxic group 0.2%±2.3%(d=0.06,P=0.8),with the difference between groups being clinically worthwhile but not statistically significant(d=0.77,P=0.1).Distance covered in the Yo-Yo intermittent recovery test tended to increase in the hypoxic(32.5%±39.3%,d=1.0,P=0.1)but not normoxic group(0.3%±24.5%,d=0.08,P=0.9),with a non-significant change between groups(d=0.9,P=0.2).Compared to normoxia,the hypoxic group significantly increased subjective markers of stress(d=0.53,P=0.005),fatigue(d=0.43,P=0.005),and muscle soreness(d=0.46,P=0.01),which resulted in a lower perceived training performance in the hypoxic compared to the normoxic group(d=0.68,P=0.001).Conclusion High-intensity interval training under hypoxic conditions likely improved 1-min all-out shuttle run ability in female basketball 3-on-3 players but also increased subjective markers of stress and fatigue which must be taken into con-sideration when prescribing such training.

关键词： 1-min all-out shuttle run anaerobic performance Aerobic performance Altitude training

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