Publications by authors named "Abigail Larson"

Article Synopsis
  • * Among those with multiple SF, 82% were found to be 'at risk' for LEA, indicating a strong link between lower energy availability and injury in this group.
  • * The research highlighted the effectiveness of the LEAF-Q and DESA-6 questionnaires in identifying significant factors like food restriction and eating disorders related to higher instances of SF.
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Context: Collegiate female distance runners may be at risk for low energy availability (LEA) due to increased exercise energy expenditure with or without decreased energy intake. Furthermore, this population has increased risk of disordered eating (DE), which can lead to LEA and negative health consequences, such as menstrual dysfunction (MD).

Objective: 1) investigate risk of LEA and DE, 2) compare DE, training volume, and weight dissatisfaction among female collegiate runners at risk vs not at risk for LEA, and 3) compare risk for LEA between NCAA (National Collegiate Athletics Association) Division I, II, and III female collegiate runners.

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Women's collegiate basketball is a fast-growing, dynamic sport that spans 8 or more months, with athletes competing in 30 + games in a season. The aim of this study was to quantify and profile the external load of practices and games during a Power-5 DI Women's Collegiate Basketball season. Specifically, Average PlayerLoad (PL), PlayerLoad per minute (PL*min), High Inertial Movement Analysis (High-IMA), and Jumps were quantified using Catapult Openfield software during four distinct training periods of the year: 8-hour preseason, 20-hour preseason, non-conference, and conference game play.

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Unlabelled: Elite competitive sport climbers exhibit a high strength-to-weight ratio and are reported in the literature to be lighter and leaner than their athletic counterparts. Current research regarding nutrition among climbers is sparse but suggests that they may be at high risk for low energy availability and Relative Energy Deficiency in Sport (RED-S). The prevalence of amenorrhea, one of the primary indicators of RED-S, is unknown in this athletic population.

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Athletes participating in endurance sports report frequent attempts to lose weight and greater training volumes in attempt to gain a competitive advantage. Increased exercise energy expenditure through training, weight periodization, and prevalence of eating disorder (ED) may affect energy availability. Low energy availability (LEA) is associated with negative physiological effects and an increased risk of bone fractures and illness in athletes.

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Background: Military service members carry the responsibility to maintain physical and psychological readiness. As such, it is critical for researchers to begin unravelling the widespread impact of the COVID-19 pandemic on service member's mental and physical wellbeing. The aim of this research was to investigate the complex relationships between BMI, physical activity, psychological stress and resilience among United States Air National Guardsmen (USANG), specifically during the pandemic.

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Disordered eating (DE) is characterized as a range of irregular eating patterns or behaviors, which may lead to pathological eating or a clinical eating disorder diagnosis. DE patterns are associated with a variety of negative health outcomes. The prevalence of DE is highest in female athletes who participate in aesthetic or weight dependent sports.

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Background: Clinical studies have reported hydrogen-rich water (HRW) to have therapeutic and ergogenic effects. The aim of this study was to determine the effect of acute supplementation with HRW on exercise performance as measured by VO, respiratory exchange ratio (RER), heart rate (HR), and respiratory rate (RR).

Methods: Baseline levels of all exercise indices were determined in nineteen (4 female, 23.

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Background: Concussive events frequently occur in high impact sports such as North American football. The long term effects of concussive events on physical and psychological wellbeing are the focus of ongoing research. The purpose of this study was to determine if concussive events increase the incidence of depression in active semi-professional and professional North American football players.

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Quercetin (Q) reduces blood pressure (BP) in hypertensive individuals, but the mechanism is unknown. We hypothesized that acute Q aglycone administration reduces BP in hypertensive men by decreasing angiotensin-converting enzyme (ACE) activity and/or by lowering the ratio of circulating endothelin-1 (ET-1) to nitric oxide and that these alterations will improve endothelial function. Using a double-blind, placebo-controlled, crossover design Q or placebo (P) was administered to normotensive men (n = 5; 24 ± 3 years; 24 ± 4 kg/m(2)) and stage 1 hypertensive men (n = 12; 41 ± 12 years; 29 ± 5 kg/m(2)).

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Epidemiological studies beginning in the 1990s have reported that intake of quercetin, a polyphenolic flavonoid found in a wide variety of plant-based foods, such as apples, onions, berries, and red wine, is inversely related to cardiovascular disease. More recent work using hypertensive animals and humans (>140 mm Hg systolic and >90 mm Hg diastolic) indicates a decrease in blood pressure after quercetin supplementation. A number of proposed mechanisms may be responsible for the observed blood pressure decrease such as antioxidant effects, inhibition of angiotensin-converting enzyme activity, and improved endothelium-dependent and -independent function.

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Quercetin is a polyphenolic flavonoid. Common sources in the diet are apples, onions, berries, and red wine. Epidemiological studies have found an inverse relationship between dietary quercetin intake and cardiovascular disease.

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This study attempted to quantify the difference in heart rate and exercise stage at which blood lactate threshold (T(bla)) occurs using 3 different modes of exercise: running, double poling (DP) on roller skis, and skating (SK) on roller skis. Nine elite collegiate cross-country ski racers (4 men, 5 women) served as test subjects. Testing was conducted on a motorized FitNex treadmill, specially designed for roller skiing.

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