Kristina L. Kendall

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BACKGROUND Intermittent bouts of high-intensity exercise result in diminished stores of energy substrates, followed by an accumulation of metabolites, promoting chronic physiological adaptations. In addition, beta-alanine has been accepted has an effective physiological hydrogen ion (H+) buffer. Concurrent high-intensity interval training (HIIT) and(More)
The purpose of this study was to determine the effects of beta-alanine supplementation and high-intensity interval training (HIIT) on electromyographic fatigue threshold (EMGFT) and efficiency of electrical activity (EEA). A total of 46 men completed four, 2-min work bouts on a cycle ergometer. Using bipolar surface electrodes, the EMG amplitude was(More)
BACKGROUND Evidence suggests CaHMB may impact muscle mass and/or strength in older adults, yet no long-term studies have compared its effectiveness in sedentary and resistance training conditions. The purpose of this study was to evaluate the effects of 24 weeks of CaHMB supplementation and resistance training (3 d wk(-1)) or CaHMB supplementation only in(More)
The purpose of this study was to evaluate the effects of β-alanine supplementation on markers of oxidative stress. Twenty-four women (age: 21.7 ± 2.1 years; VO2max: 2.6 ± 0.3 l min−1) were randomly assigned, in a double-blind fashion, to a β-alanine (BA, 2 × 800 mg tablets, 3× daily; CarnoSyn®; n = 13) or placebo (PL, 2 × 800 mg maltodextrin tablets, 3×(More)
The intermittent critical velocity (ICV) test is used to quantify the relationship between velocity and time to exhaustion, yielding an aerobic parameter (ICV), an anaerobic parameter (anaerobic running capacity [ARC]), and critical rest interval (CRI). Critical rest interval is the theoretical rest period needed to maintain repeated bouts of exercise for(More)
BACKGROUND High-intensity interval training has been shown to be a time-efficient way to induce physiological adaptations similar to those of traditional endurance training. Creatine supplementation may enhance high-intensity interval training, leading to even greater physiological adaptations. The purpose of this study was to determine the effects of(More)
The purpose of the present study was to evaluate the effects of cycle ergometry high-intensity interval training (HIIT) with and without beta-alanine supplementation on maximal oxygen consumption rate (VO2 peak), cycle ergometer workload at the ventilatory threshold (VT W), and body composition. Forty-four women (mean +/- SD age = 21.8 +/- 3.7 years; height(More)
BACKGROUND The use of surface electromyography has been accepted as a valid, non-invasive measure of neuromuscular fatigue. In particular, the electromyographic fatigue threshold test (EMG(FT)) is a reliable submaximal tool to identify the onset of fatigue. This study examined the metabolic relationship between VO(2PEAK), ventilatory threshold (VT), and the(More)
The use of β-alanine in sport is widespread. However, the effects across all sport activities are inconclusive. The purpose of this study was to evaluate the effects of β-alanine supplementation on high-intensity running performance and critical velocity (CV) and anaerobic running capacity (ARC). Fifty recreationally trained men were randomly assigned, in a(More)
β-Alanine (BA) has been linked with oxidative protection. This study evaluated antioxidant properties of BA. Twenty-five men consumed BA or placebo for 4 weeks, and completed a 40-min run to induce oxidative stress. Blood draws were taken to measure 8-isoprostane, total antioxidant capacity, superoxide dismutase, and glutathione. BA had no significant(More)