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Percorrer por autor "Peixoto, Diogo"

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  • Comparison of motivational factors between the practice of sports of nature, competitive adventure and leisure
    Publication . Brandão, António; Frontini, Roberta; Peixoto, Diogo; Fernandes, Daniel; Clemente, Filipe Manuel
    The main aim of this study was to compare sports practitioners of a competitive and leisure nature sports regarding their motivations for practice. The sample consisted of 631 adults (504 men and 127 women) who practiced nature and adventure sports. Participants answered an assessment protocol composed of a sociodemographic form and the Exercise Motivation Inventory - 2 (EMI-2) questionnaire. Among leisure and competition practitioners, variations were analyzed using standardized effect size differences (ES) with 90% Confidence Interval (CI). The following scale was used to interpret the magnitude effect: <0,2, trivial; 0,2-0,6, small; 0,6-1,2, moderate; > 1,2, large. The probabilities were tested considering the smallest worthwhile changes (SW, 0,2 x between SD subjects). The following scale was used for qualitative probabilities: 25-75%, possibly; 75-95%, likely; 95-99% very likely; e> 99% almost certain. Differences in variables were tested regarding the following factors: Social Recognition, Positive Health, Weight, Stress Management, Revitalisation, Enjoyment, Challenge, Affiliation, Competition, Health Pressures, Health Avoidance, Appearance, Strength & Endurance and Nimbleness. Only the variables Enjoyment and Competition had moderate magnitude when comparing leisure to competitive practitioners. When comparing within gender, we found that the variable Competition is more noticeable in females compared to leisure having a probability of almost certain with large magnitude on the Enjoyment variable -29.2% [-36.8;-20.6]; ES: -2.17 [-2.89;-1.45] and competition -50.7% [-60.6;-38.4]; ES: -1.52 [-2.00;-1.04]. Understanding the motives that fit the practice of a particular sport is essential to tailor a strategy and make sports plans more appealing and interesting for their practitioners. The Enjoyment and Competition factors were the most significant, which influenced the gender differences between and when comparing the profile of leisure and competitors.
    2020-02-05Artigo científico Acesso aberto Ver mais
  • Short-term immune responses of Gilthead Seabream (Sparus aurata) Juveniles against Photobacterium damselae subsp. piscicida
    Publication . Santos, Paulo; Peixoto, Diogo; Ferreira, Inês; Passos, Ricardo; Pires, Pedro; Simões, Marco; Pousão-Ferreira, Pedro; Baptista, Teresa; Costas, Benjamin
    Photobacteriosis is a septicaemic bacterial disease affecting several marine species around the globe, resulting in significant economic losses. Although many studies have been performed related to the pathogen virulence and resistance factors, information regarding the host defence mechanisms activated once an infection takes place is still scarce. The present study was designed to understand innate immune responses of farmed juvenile gilthead seabream (Sparus aurata) after Photobacterium damselae subsp. piscicida (Phdp) infection. Therefore, two groups of seabream juveniles were intraperitoneally injected with 100 uL of PBS (placebo) or 100 uL of exponentially growing Phdp (1 x 106 CFU/mL; infected). The blood, plasma, liver, and head kidney of six fish from each treatment were sampled immediately before infection and 3, 6, 9, 24 and 48 h after infection for the broad screening of fish immune and oxidative stress responses. Infected animals presented marked anaemia, neutrophilia and monocytosis, conditions that are correlated with an increased expression of genes related to inflammation and phagocytic activity. Similar studies with different fish species and bacteria can be useful for the definition of health biomarkers that might help fish farmers to prevent the occurrence of such diseases.
    2021Artigo científico Acesso aberto Ver mais