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Browsing by Issue Date, starting with "2025-06"

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  • Social media as a driver of physical activity: a snapshot from sport sciences students
    Publication . López-Carril, Samuel; Bae, Deukmook; Alguacil, Mario; Ribeiro, Tiago
    Social media has become integral to daily life. During the COVID-19 pandemic, these digital tools enabled people to maintain physical activity at home despite restrictions, positively impacting public health. This study examines whether the trend of using social media to support physical activity has continued post-pandemic. A questionnaire was administered to 251 university sport sciences students to gauge their perceptions of social media's role in guiding and promoting physical activity. The findings indicate that participants engage with social media daily, viewing platforms such as YouTube, Instagram, and TikTok as valuable for visualizing and promoting physical activity. However, they report a lack of professional training in social media use at the university level. These results carry practical implications for health policymakers, educational institutions, faculty, students, and sport industry professionals, highlighting the importance of targeted training in social media management and the development of relevant policies to harness the potential of social media in promoting physical activity.
    2025-06Journal article Open access Show more
  • A long photoperiod following a short one, and low temperature, stimulate gametogenesis in the sea cucumber Holothuria arguinensis
    Publication . Marquet, Nathalie; Canario, Adelino
    Temperature and photoperiod are critical regulators of reproduction. However, few studies have evaluated experimentally their specific effects on gametogenesis in sea cucumbers. We tested the effect on gametogenesis of combinations of photoperiod and temperature: "accelerated" (long days following short days; a 12 degrees C deep in temperature), "constant" (constant short photoperiod; constant Spring/Summer temperature) and "natural" conditions (natural photoperiod and temperature). Experiment 1 started in mid-November (after gametogenesis began) and lasted until March. Experiment 2 started in September, after the spawning season (before gametogenesis started), with gonadal biopsy and spawning trials between March and May. In both experiments, the most advanced gonad development was found in accelerated photoperiod and temperature, with more than 50 % of the sea cucumbers reaching maturity and having the longest and thickest gonadal tubules. However, gametogenesis could not progress in sea cucumbers (i.e., shortest and thinnest gonad tubules) under constant short photoperiod combined with accelerated temperature. This indicates that a constant short photoperiod inhibits gametogenesis and that an accelerated thermal cycle cannot trigger gonad development alone. When accelerated photoperiod was combined with either accelerated or constant temperature, gametogenesis progressed, advancing faster in accelerated than constant temperature, with spawning only seen in these two treatments. This highlights that long days following short days are required for gametogenesis and that temperature has a modulatory role rather than a trigger, with a cool winter period being stimulatory. Altogether, our study provides essential information into environmental factors in sea cucumber reproduction, valuable for broodstock management and sustainable aquaculture.
    2025-06Journal article Open access Show more