Loading...
Publication
Efeito ergogénico da cafeína na prova de aptidão profissional num grupo operacional de policias de elite
| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| 2.03 MB | Adobe PDF |
Authors
Abstract(s)
OBJETIVOS: (1) Estudar o efeito da familiarização com a prova de aptidão técnica (PAT); (2) Estudar a associação entre a frequência cardíaca (FC) e a perceção subjetiva do esforço (PSE6-20), com o desempenho na PAT; (3) Estudar o efeito da ingestão de cafeína no desempenho da PAT; (4) Estudar o efeito da ingestão de cafeína sobre a FC durante a realização da PAT; e (5) Estudar o efeito da cafeína sobre a PSE6-20.
DESENHO: Randomizado, duplo-cego com avaliação de controlo.
MÉTODO: Participaram no estudo 12 homens fisicamente ativos, pertencentes ao Corpo de Intervenção (CI) da Polícia de Segurança Pública (PSP), e com idade entre 27 e 35 anos (estatura = 179.75 ± 3.44; massa corporal = 76.92 ± 3.77). Os participantes efetuaram: (1) Teste de familiarização com a PAT (T1, FAM); e (2) Re-teste da PAT (T2, CON). Vinte e quatro horas após o re-teste, os participantes realizaram a PAT com suplementação de cafeína (T3, CAF) ou placebo (T3, NCAF). Em todos os momentos foi registado o tempo despendido na realização da PAT, o score referente à PSE6-20 e FC. Posteriormente foram calculadas a percentagens de FC máxima (%FCmáx) e da FC de reserva (%FCR).
RESULTADOS: (1) os participantes demoraram significativamente mais tempo a realizar a PAT na 1ª vez que a realizaram a prova (FAM vs. CON; t(11) = 4.291; p = 0.001), embora esse comportamento não se observe na %FCmáx (Z = -0.179; ns), %FCR (Z = -0.051; ns) e PSE6-20 (t(11) = 1.239; ns); (2) em FAM, a associação entre a %FCmáx (rho = -0.521) e %FCR (rho = -0.544), com o tempo despendido na realização da PAT é significativa; e (3) não existe evidência estatística de que as diferenças registadas nas médias sejam significativas quando considerado CON vs. CAF (PAT, t(5) = 1.577; %FCmáx, t(5) = 0.000; %FCR, t(5) = 0.085; PSE6-20, t(5) = 0.655), ou CON vs. NCAF (PAT, t(5) = -1.158; %FCmáx, t(5) = 0.631; %FCR, t(5) = 0.630; PSE6-20: t(5) = 0.000).
CONCLUSÃO: Os resultados sugerem que (1) a PAT é uma prova de intensidade moderada; (2) a familiarização parece potenciar o desempenho na PAT; e (3) o café não tem efeito significativo no desempenho da PAT
Objectives: (1) To study the familiarization’s effect on police tactical evaluation (PAT); (2) To study the association between heart rate (FC) and subjective pain perception ( PSE) with PAT performance; (3) To study the effect of caffeine ingestion on the PAT performance; (4) To study the effect of caffeine ingestion on FC during the PAT execution; and (5) To study the caffeine’s effect on PSE Design: Randomized, double-blind with control through placebo. Method: Twelve males of one Portuguese Tactical groups (Corpo de Intervenção – CI) of Security Public Police (PSP) participed in the study, with have between 27 and 35 years old (height = 179.75 ± 3.44; body mass = 76.92 ± 3.77). Participants performed: (1) familiarization test with PAT (TI, FAM); and (2) PAT re-test (T2, CON). 24 hours after re-test the participants performed PAT under caffeine supplementation (T3, CAF) or placebo (T3, NCAF). In every moments, the time expended during PAT execution, the score refered to PSE6-20 and FC, has been recorded. Subsequently, the percentage of the maximal heart rate (%FCmáx) and heart rate reserve were measured. Results: (1) participants were significantly more slow to perform the PAT in the first time that took te test (FAM vs. CON; t(11) = 4.291; p = 0.001), even though these performance is not observed on %FCmáx (Z = -0.179; ns), %FCR (Z = -0.051; ns) and PSE6-20 (t(11) = 1.239; ns); (2) in FAM, the association between %FCmáx (rho = -0.521) and %FCR (rho = -0.544) with the time to complete the PAT execution is significant; (3) there is no statistical evidence that the differences recorded in the medium are significant when considered CON vs. CAF (PAT, t(5) = 1.577; %FCmáx, t(5) = 0.000; %FCR, t(5) = 0.085; PSE6-20, t(5) = 0.655), or CON vs. NCAF (PAT, t(5) = -1.158; %FCmáx, t(5) = 0.631; %FCR, t(5) = 0.630; PSE6-20: t(5) = 0.000) Conclusions: The results suggest that: (1) PAT is a moderated intensity test; (2) familiarization appears to enhance performance in the PAR; and (3) coffee has no significant effect on the performance of PAT
Objectives: (1) To study the familiarization’s effect on police tactical evaluation (PAT); (2) To study the association between heart rate (FC) and subjective pain perception ( PSE) with PAT performance; (3) To study the effect of caffeine ingestion on the PAT performance; (4) To study the effect of caffeine ingestion on FC during the PAT execution; and (5) To study the caffeine’s effect on PSE Design: Randomized, double-blind with control through placebo. Method: Twelve males of one Portuguese Tactical groups (Corpo de Intervenção – CI) of Security Public Police (PSP) participed in the study, with have between 27 and 35 years old (height = 179.75 ± 3.44; body mass = 76.92 ± 3.77). Participants performed: (1) familiarization test with PAT (TI, FAM); and (2) PAT re-test (T2, CON). 24 hours after re-test the participants performed PAT under caffeine supplementation (T3, CAF) or placebo (T3, NCAF). In every moments, the time expended during PAT execution, the score refered to PSE6-20 and FC, has been recorded. Subsequently, the percentage of the maximal heart rate (%FCmáx) and heart rate reserve were measured. Results: (1) participants were significantly more slow to perform the PAT in the first time that took te test (FAM vs. CON; t(11) = 4.291; p = 0.001), even though these performance is not observed on %FCmáx (Z = -0.179; ns), %FCR (Z = -0.051; ns) and PSE6-20 (t(11) = 1.239; ns); (2) in FAM, the association between %FCmáx (rho = -0.521) and %FCR (rho = -0.544) with the time to complete the PAT execution is significant; (3) there is no statistical evidence that the differences recorded in the medium are significant when considered CON vs. CAF (PAT, t(5) = 1.577; %FCmáx, t(5) = 0.000; %FCR, t(5) = 0.085; PSE6-20, t(5) = 0.655), or CON vs. NCAF (PAT, t(5) = -1.158; %FCmáx, t(5) = 0.631; %FCR, t(5) = 0.630; PSE6-20: t(5) = 0.000) Conclusions: The results suggest that: (1) PAT is a moderated intensity test; (2) familiarization appears to enhance performance in the PAR; and (3) coffee has no significant effect on the performance of PAT
Description
Keywords
cafeína forças de segurança intensidade do esforço prova de aptidão profissional substância ergogénicas