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Olympic distance duathlon and cardiac performance in highly-trained triathletes.
Physiol Rep
December 2024
Department of Cardiology, St George's University Hospitals NHS Foundation Trust, London, UK.
The effects of triathlon exercise on cardiac function are well documented. While Olympic triathlon (swim-bike-run) remains the standard format, increasing concerns about water quality in natural waterways present ongoing challenges for open-water swimming events, highlighting the potential need to consider alternative formats such as duathlon (run-bike-run) in some circumstances. An additional run may increase the overall metabolic and cardiovascular demand compared with the swim in triathlon, leading to reduced future performance.
View Article and Find Full Text PDFBiological relevance and methodological implications of unexpected hearing thresholds in a diving bird.
Sci Rep
December 2024
Deutsches Meeresmuseum, Katharinenberg 14 - 20, 18439, Stralsund, Germany.
Many animals alternate between different media, such as air and water, thanks to specific adaptations. Among birds, penguins (Sphenisciformes) have the most extreme morphological, physiological, and behavioural adaptations to their amphibious lifestyle. Their auditory perception of sound, potentially matching different impedances in air and under water, is largely unknown particularly in terms of whether their underwater adaptations may have affected their in-air hearing capacity.
View Article and Find Full Text PDFGC-MS Analysis, Neuropharmacological and Antidiarrheal Activities of the Acetone Extract of Najas gracillima Seaweed: In Vivo and In Silico Study.
Chem Biodivers
December 2024
University of Chittagong, Pharmacy, chittagong 4331, 4331, Chittagong, BANGLADESH.
Najas gracillima, a marine seaweed found in North America and Asia, was investigated for its neuropharmacological and antidiarrheal properties. Acetone extracts of N. gracillima (ANG) were analyzed using both in vivo and in silico methods.
View Article and Find Full Text PDFLong-Term Yo-Yo Dieting Exaggerates Liver Steatosis and Lesions but Preserves Muscle Performance in Male Zebrafish.
Int J Mol Sci
December 2024
Department of Animal Science and Technology, National Taiwan University, Taipei 10672, Taiwan.
Weight regain within one year after weight loss is frequently observed and is referred to as yo-yo dieting or weight cycling. In this study, we explore the effects of yo-yo dieting on the liver, adipose tissue, and muscle characteristics of male zebrafish. Four-month-old AB wild-type male zebrafish were randomly assigned to three groups: high-calorie intake (H, seven meals per day), low-calorie intake (L, two meals per day), and yo-yo diet (the low- and high-calorie alternation switched every two weeks) groups.
View Article and Find Full Text PDFStress-Easing Effect of Diacyl Glyceryl Ethers on Anxiety-Related Behavior in Mice.
Foods
November 2024
Department of Psychology, Graduate School of Arts and Letters, Tohoku University, Kawauchi 27-1, Aoba-ku, Sendai 980-8576, Miyagi, Japan.
Stress and anxiety are significant psychological challenges in modern society, which have led to a rapidly growing market for functional foods, including those reported to relieve stress, as alternatives to psychoactive drugs. Among these, diacyl glyceryl ethers (DAGE) derived from deep-sea shark liver oil have gained attention for their strong antioxidant properties and potential mental health benefits. Building on preliminary evidence suggesting DAGE's efficacy in enhancing stress resilience and modulating biochemical pathways associated with reduced oxidative stress, the present study aimed to examine their effects on stress responses in two specific mouse strains.
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