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    Browsing by Author "Chrismas, Bryna C.R."

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        Additional clothing increases heat load in elite female Rugby sevens players 

        Henderson, Mitchell J.; Chrismas, Bryna C.R.; Stevens, Christopher J.; Novak, Andrew; Fransen, Job; Coutts, Aaron J.; Taylor, Lee... more authors ... less authors ( Human Kinetics Publishers Inc. , 2021 , Article)
        Purpose: To determine whether elite female rugby sevens players are exposed to core temperatures (Tc) during training in the heat that replicate the temperate match demands previously reported and to investigate whether ...
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        Adherence and retention to the self-managed community-based Step Into Health program in Qatar (2012–2019) 

        Chrismas, Bryna C.R.; Majed, Lina; Al-Mohannadi, Abdulla Saeed; Sayegh, Suzan ( Frontiers Media SA , 2022 , Article)
        Purpose: Investigate adherence and retention to the “Step Into Health (SIH)” initiative (www.stepintohealth.qa [website access only available from within the State of Qatar]), a Qatari self-managed community-based health ...
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        Breaking up prolonged sitting time with walking does not affect appetite or gut hormone concentrations but does induce an energy deficit and suppresses postprandial glycaemia in sedentary adults 

        Bailey, Daniel P.; Broom, David R.; Chrismas, Bryna C.R.; Taylor, Lee; Flynn, Edward; Hough, John... more authors ... less authors ( NRC Research Press , 2016 , Article)
        Background: Breaking up periods of prolonged sitting can negate harmful metabolic effects but the influence on appetite and gut hormones is not understood and is investigated in this study. Methods: Thirteen sedentary (7 ...
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        Caffeine Supplementation as an Ergogenic Aid for Muscular Strength and Endurance: A Recommendation for Coaches and Athletes 

        Brooks, Joseph H.; Wyld, Kevin; Chrismas, Bryna C.R. ( SciTechnol , 2016 , Article)
        Caffeine (1, 3, 7-trimethylxanthine) which can be ubiquitously found in energy drinks, sodas, coffee, and supplements, is one of the principal legal drugs consumed worldwide. Caffeine based ergogenic aids are utilized ...
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        Changes in core temperature during an elite female rugby sevens tournament 

        Henderson, Mitchell J.; Chrismas, Bryna C.R.; Stevens, Christopher J.; Coutts, Aaron J.; Taylor, Lee ( Human Kinetics Publishers Inc. , 2020 , Article)
        Purpose: To characterize player core temperature (Tc) across a World Rugby Women's Sevens Series tournament day (WRWSS) and determine the efficacy of commonly employed cold-water-immersion (CWI) protocols. Methods: Tc was ...
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        Core Body Temperatures in Intermittent Sports: A Systematic Review 

        Henderson, Mitchell J.; Grandou, Clementine; Chrismas, Bryna C.R.; Coutts, Aaron J.; Impellizzeri, Franco M.; Taylor, Lee... more authors ... less authors ( Springer Nature , 2023 , Article)
        Background: Hyperthermia (and associated health and performance implications) can be a significant problem for athletes and teams involved in intermittent sports. Quantifying the highest thermal strain (i.e. peak core body ...
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        The Importance of Monitoring Sleep within Adolescent Athletes: Athletic, Academic, and Health Considerations 

        Taylor, Lee; Chrismas, Bryna C.R.; Dascombe, Ben; Chamari, Karim; Fowler, Peter M. ( Frontiers Media , 2016 , Article)
        Opinion piece.
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        The influence of environmental and core temperature on cyclooxygenase and PGE2 in healthy humans 

        Esh, Christopher J.; Chrismas, Bryna C.R.; Mauger, Alexis R.; Cherif, Anissa; Molphy, John; Taylor, Lee... more authors ... less authors ( Springer Nature , 2021 , Article)
        Whether cyclooxygenase (COX)/prostaglandin E2 (PGE2) thermoregulatory pathways, observed in rodents, present in humans? Participants (n = 9) were exposed to three environments; cold (20 °C), thermoneutral (30 °C) and hot ...
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        Limiting Rise in Heat Load With an Ice Vest During Elite Female Rugby Sevens Warm-Ups 

        Henderson, Mitchell J.; Chrismas, Bryna C.R.; Stevens, Christopher J.; Fransen, Job; Coutts, Aaron J.; Taylor, Lee... more authors ... less authors ( Human Kinetics Publishers Inc. , 2021 , Article)
        Purpose: To determine the effect of wearing a phase-change cooling vest in elite female rugby sevens athletes during (1) a simulated match-day warm-up in hot conditions prior to a training session and (2) a prematch warm-up ...
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        Pharmacological hypotheses: Is acetaminophen selective in its cyclooxygenase inhibition? 

        Esh, Christopher J.; Chrismas, Bryna C.R.; Mauger, Alexis R.; Taylor, Lee ( Wiley-Blackwell , 2021 , Article)
        The precise mechanistic action of acetaminophen (ACT; paracetamol) remains debated. ACT’s analgesic and antipyretic actions are attributed to cyclooxygenase (COX) inhibition preventing prostaglandin (PG) synthesis. Two COX ...
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        Postprandial insulin and triglyceride concentrations are suppressed in response to breaking up prolonged sitting in Qatari females 

        Chrismas, Bryna C.R.; Taylor, Lee; Cherif, Anissa; Sayegh, Suzan; Rizk, Nasser; El-Gamal, Abdelrahman; Allenjawi, Salwa Hassan; Bailey, Daniel P.... more authors ... less authors ( Frontiers Media S.A. , 2019 , Article)
        Background: Cultural, environmental and logistical factors challenge the Qatari population, particularly females, to engage in physical activity, and there is a high prevalence of diabetes in this population. Sedentary ...
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        Responses to a 5-Day Sport-Specific Heat Acclimatization Camp in Elite Female Rugby Sevens Athletes 

        Henderson, Mitchell J.; Chrismas, Bryna C.R.; Fransen, Job; Coutts, Aaron J.; Taylor, Lee ( Human Kinetics Publishers Inc. , 2022 , Article)
        Purpose: To describe the physiological (resting core temperature, exercising heart rate, and sweat rate) and psychophysical (rating of perceived exertion, thermal sensation, and thermal comfort) responses to a short-term ...
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        Sleep Medication and Athletic Performance—The Evidence for Practitioners and Future Research Directions 

        Taylor, Lee; Chrismas, Bryna C.R.; Dascombe, Ben; Chamari, Karim; Fowler, Peter M. ( Frontiers Media , 2016 , Article)
        Opinion piece.
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        Thirty Days of Montmorency Tart Cherry Supplementation Has No Effect on Gut Microbiome Composition, Inflammation, or Glycemic Control in Healthy Adults 

        Hillman, Angela R.; Chrismas, Bryna C.R. ( Frontiers Media SA , 2021 , Article)
        Tart cherries possess properties that may reduce inflammation and improve glycemic control, however human data on supplementation and the gut microbiota is equivocal. Processing (i.e., juice concentrate, dried, frozen) may ...

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