Percorrer por autor "Costa, A."
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- Estratégia Nacional para o envelhecimento ativo e saudável: intervisões para o bem-estar de idososPublication . Galinha, S. A.; Monteiro, P.; Tavares, T.; Costa, A.
- Observation of the stability of a technical implementation of evidence in 200m butterflyPublication . Louro, Hugo; Silva, A.; Costa, A.; Rodrigues, J.; Conceição, Ana; Campaniço, J.OBJECTIVE: The aim of this study was find patterns in the swimming butterfly technique at a distance of 200 meters using the system Behavioural Observation System of the Technical Butterfly, qualitative analysis allows the observation and study of the stability of the technical implementation. METHODS: Instrument for ad-hoc, with the structure of the instrument based on a mixed system Categories and Field Formats which we can record specific techniques observed during the gestual cycles. We performed the analysis of temporal patterns (T-pattern), a sequence of five gestual cycles of the butterfly style in each part of 50 meters. To study the sequence of codes and their interaction representative of the technician in two swimmers at the national level. Swimmers performed the tasks with speed competition, with the same control by the GBK PACER. To detect the emporal patterns of each swimmer, using the Theme 5.0 software, which allows to identify the structures of the technical standard within a range of critical time (p<0,05) – T-patterns. RESULTS: In the results the patterns found settings are different and different levels of complexity depending on the adjustments made by the swimmers in gestual cycles. Variations of codes in each time producing different settings, to determine the differences between cycles of the swimmer. DISCUSSION & CONCLUSION Comparing patterns found distinct differences between swimmers, the records demonstrated a clear behavioral similarity when compared the result with the biomechanical model of the general butterfly technique. Technique is objective for the purpose it was created and is a valuable instrument for qualitative analysis.
- Passive transfer of immunity: evaluation of mare colostrum quality and immunoglobulin G concentration in the new-born foalPublication . Costa, A.; Bliebernitch, M.; Maerten, C.; Assunção, D.; Vicente, António; Fradinho, M.Ingestion of high quality colostrum at birth is a determinant factor influencing a foal's health. As no antibodies pass through the mare's diffuse epitheliochorial placenta, failure of passive transfer (FPT) is an important cause of morbidity and mortality during the first month of foals’ life. FPT is defined as serum immunoglobulin G (IgG) concentration <400 mg/dl at 24 h of age. Mare's breed, age, nutrition and vaccination protocol have been described as having influence on colostrum quality, however, previous results reveal inconsistencies. The aim of this study was to evaluate the influence of different factors related to the mare on colostrum quality (IgG concentration) and its relationship with foal's IgG serum levels between 12 and 24 h of life. In this study, 131 mares of different breeds (Lusitano, French Trotter, Warmblood and Arabian/Anglo‐Arabian) and ages (4–10 years old) were monitored during four breeding seasons (2014–2017). All mares were from the same stud farm and had the same pre‐partum management, within each year. Colostrum quality was evaluated using a Brix refractometer (RHB‐32®) and IgG levels were accessed through a commercial kit (DVM Rapid Test II®). Considering the breed, Arabian/Anglo‐Arabian mares showed the lowest Brix % (p < 0.01). Age, parity and foaling season had no influence on colostrum quality (p > 0.05). However, a progressive increase of colostrum quality was observed until 2016 (p < 0.05) which could be ascribed to an improvement of stud farm practices such as nutrition and vaccination protocols. In the present study, a positive correlation between colostrum density and IgG foals’ serum concentrations was also detected (r = 0.335; p < 0.001) supporting the importance of good quality colostrum for passive transfer of immunity.