Browsing by Subject "Lactic acid"

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    Effectiveness of lactate threshold exercises in the concentration of lactic acid in blood and in the endurance performing layups in under 18-years of age basketball players
    (Universidad de Murcia. Servicio de publicaciones, 2022) Obed Hamza, Nidal; Mnaty Sachit, Hussein; Kareem Finteel, Ali; Abdulhamza Kadhem, Abbas
    The aim of the present study was to identify the effectiveness of lactate threshold exercises in the concentration of lactic acid in blood and in the endurance performing layups in under 18-years of age basketball players. The present study was conducted with basketball players of Al-Shorta Sports Club for the youth category aged 16-18 years, in the 2021 sports season, in the basketball court of Al-Shorta Sports Club, within the time frame of December 2021 to February 2021. The present study had an experimental design. Participants were allocated into two groups (experimental group and control group) by simple random allocation method (raffle). A total of 14 basketball players were selected as participants for the study. Participants were randomly allocated in each group with n=7 in each group. Lactate threshold exercises were applied in 24 training units, three training units per week for a total of 8 weeks. During weeks 1 and 2 the exercises were performed without a competitor, during weeks 3 and 4 with a negative competitor, and during weeks 5-8 with a positive competitor. In conclusion, the lactate threshold exercises used in this study improved the concentration of lactic acid in blood and the endurance performing layups in under 18-years of age basketball players.
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    Effects of fluoride and calcium phosphate-based varnishes in children at high risk of tooth decay: a randomized clinical trial
    (MDPI, 2021-09-24) Poza-Pascual, Andrea; Serna-Muñoz, Clara; Pérez-Silva, Amparo; Martínez Beneyto, Yolanda; Cabello, Inmaculada; Ortiz Ruiz, Antonio José; Dermatología, Estomatología, Radiología y Medicina Física
    The aim of this study was to investigate the effect of the application of two varnishes—MI Varnish (5% sodium fluoride with CPP-ACP) and Clinpro White Varnish (5% sodium fluoride with fTCP)—applied every three months in children with high caries risk for 12 months on plaque indexes, salivary pH, salivary lactic acid and chemical elements concentrations. Methods: We included 58 children aged 4–12 years, assigned to control (placebo), Clinpro and MI groups. Baseline and three-month saliva samples were taken. We assessed changes in pH, lactic acid concentrations and chemical elements in saliva. Results: At 12 months, all groups showed a nonsignificant increase in pH levels and a reduction in lactic acid, which was greatest in the placebo group. There was a significant reduction in 24Mg (p = <0.001), 31P (p = 0.033) and 66Zn (p = 0.005) levels in the placebo group (p ≤ 0.05), but not in the other elements studied: 23Na, 27Al, 39K, 44Ca, 52Cr, 55Mn, 57Fe, 59Co, 63Cu, 75As, 111Cd, 137Ba, 208Pb and 19F. Conclusions: Neither pH, lactic acid concentrations or most salivary chemical elements were useful in defining patients at high risk of caries or in monitoring the effect of MI Varnish and Clinpro White Varnish after three-month application for 12 months. However, the appearance of new cavities was stopped, and the hygiene index improved, probably due to hygienic and dietary measures and the use of fluoridated toothpaste. Trial registration: ISRCTN registry, ISRCTN13681286.