Leonardo Gomes de Oliveira Luz

Universidade Federal de Alagoas, APQ, Alagoas, Brazil

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Publications (4)1.36 Total impact

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    Geraldo A Maranhao Neto, Leonardo Gomes Oliveira Luz, Paulo T V Farinatti
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    ABSTRACT: The physical activity readiness questionnaire (PAR-Q) has been the most popular simple method of screening for people who intend to engage in exercise programs. Despite of the recommendations indicating that the instrument should be applied in the age range from 15 to 69 years, the questionnaire has been widely used in elderly people. The aim of this study was to assess the diagnostic accuracy of PAR-Q in elderly women with respect to absolute and relative contraindications to exercise and verify the influence of educational level and cognitive status. Eighty-nine subjects (61-89 years) participated in the study and went through clinical exams and exercise testing. The influence of educational status, age and cognitive state (Mini-Mental State Examination, MMSE) on the PAR-Q responses was analyzed by logistic regression. The occurrences of absolute and relative contraindications were respectively 9% and 22%. The Sensitivity and Specificity were 75.0% and 19.8% (absolute) and 77.8% and 19.7% (relative). The PAR-Q results were not influenced by low educational status; age, or cognitive state. In conclusion, although the usefulness and easy applicability of the PAR-Q's questions, the responses to the questionnaire led to a high number of false positive and false negative cases, suggesting that it would not be adequate as a pre-participation screening tool in elder samples.
    Archives of gerontology and geriatrics 04/2013; · 1.36 Impact Factor
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    ABSTRACT: Effect of pedaling rate on perceived exertion and heart rate in maximal incremental test. Brazilian Journal of Biomotricity. v. 5, n. 3, p. 200-209, 2011. It is known that pedaling cadence affects the mechanical efficiency, the levels of blood lactate, heart rate (HR), oxygen consumption. However, information about how pedaling cadence influences the rating of perceived exertion (RPE) is still scarce. Thus, the purpose of this study was to compare the responses of maximum power, HR and RPE achieved during maximal incremental tests (ITmax), 50 and 100 rpm, with 15W/min up to voluntary exhaustion. The sample (n = 7) comprised physically active individuals (20.4 ± 2.2 years, 73.1 ± 8.3 kg and 176.8 ± 4.6 cm). Were performed two ITmax in cycle ergometer, with cadences of 50 and 100 rpm, performed in random order (minimum of 48 hours between tests). The results showed that RPE was higher in tests with cadence of 100 rpm, but at the end of the test, the RPE did not presented differences between the cadences. Likewise, no significant difference was found in maximal HR (50rpm: 183±7,81bpm vs. 100rpm: 185,6±8,1bpm). Already in submaximal intensities, the HR was higher in the test at 100 rpm. Can conclude that the RPE and HR are influenced by the PC, is higher according to the increase in cadence. This demonstrates the applicability of the use of RPE for monitoring the intensity of effort in exercise programs performed in cycle.
    Brazilian Journal of Biomotricity. 01/2011; 5(3):203-209.
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    [Show abstract] [Hide abstract]
    ABSTRACT: It is known that pedaling cadence affects the mechanical efficiency, the levels of blood lactate, heart rate (HR), oxygen consumption. However, information about how pedaling cadence influences the rating of perceived exertion (RPE) is still scarce. Thus, the purpose of this study was to compare the responses of maximum power, HR and RPE achieved during maximal incremental tests (ITmax), 50 and 100 rpm, with 15W/min up to voluntary exhaustion. The sample (n = 7) comprised physically active individuals (20.4 ± 2.2 years, 73.1 ± 8.3 kg and 176.8 ± 4.6 cm). Were performed two ITmax in cycle ergometer, with cadences of 50 and 100 rpm, performed in random order (minimum of 48 hours between tests). The results showed that RPE was higher in tests with cadence of 100 rpm, but at the end of the test, the RPE did not presented differences between the cadences. Likewise, no significant difference was found in maximal HR (50rpm: 183±7,81bpm vs. 100rpm: 185,6±8,1bpm). Already in submaximal intensities, the HR was higher in the test at 100 rpm. Can conclude that the RPE and HR are influenced by the PC, is higher according to the increase in cadence. This demonstrates the applicability of the use of RPE for monitoring the intensity of effort in exercise programs performed in cycle.
    Brazilian Journal of Biomotricity. 01/2011; 5(3):200-209.
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    ABSTRACT: O Objetivo do presente estudo foi verifi car a validade, sensibilidade (SE), especificidade (ES), valor preditivo positivo (VPP) e valor preditivo negativo (VPN), do PAR-Q em idosos. Avaliaram-se 104 idosos, 98 mulheres e 6 homens, com 61 a 89 anos de idade (73±6 anos [média±dp]) e diferentes níveis de escolaridade. Os sujeitos responderam ao PAR-Q e passaram por avaliação clínica. A análise das respostas foi realizada por meio do teste qui-quadrado (p<0,05). Verifi cou-se a infl uência da idade e nível de escolaridade sobre questionários verdadeiros e falsos por regressão logística para Intervalo de Confi ança de 95%. Com relação à SE, observou-se um valor relativamente alto (89%), o que credenciaria o instrumento para detectar casos verdadeiro-positivos. No entanto, o resultado de ES (42%) indicou uma validade limitada do questionário, com elevado número de casos falso-negativos. Essa tendência foi confirmada pelos valores de VPP (78%) e VPN (62%). A análise de regressão logística não mostrou infl uência da idade e nível de escolaridade nas respostas aos questionários. Deduz-se que o PAR-Q, apesar de ser freqüentemente indicado como triagem pré-participação em programas de atividades físicas, pode não ser adequado em sujeitos idosos com características similares às da presente amostra. Aconselha-se uma análise mais aprofundada do instrumento em populações com diferentes características antes de se recomendá-lo de forma universal. ABSTRACT The objective of this study was to investigate the validity - sensitivity (SE), specifi city (SP), positive predictive value (PPV) and negative predictive value (NPV) of the PAR-Q in older adults. The sample cosisted of 104 subjects were evaluated, 98 women and 6 men (73 ± 6 years-old [mean±sd]), with a large rank of formal education. The responses were compared to physicians’ examinations by a chi-square test (p<.05). The specifi c infl uence of the age and level of formal education were analyzed by logistic regression for a 95% confi dence interval (95% CI). The SE (the number of subjects for whom the questionnaire was true-positive divided by the number of subjects that had an adverse characteristic in the examination) was 89%, the SP (the true-negative questionnaires divided by the number of subjects with no adverse characteristic in the examination) was 42%, the PPV (the ratio of positive tests correctly diagnosed) and the NPV (the ratio of negative tests correctly diagnosed) were 78% and 62%, respectively. The logistic regression showed no infl uence of age and educational status on questionnaire’s responses. Albeit the high value of SE, the lowest SP and NPV values suggest that the PAR-Q would not be an accurate tool to detect older people with potential contraindications to exercise engagement. New studies about the applicability of the PAR-Q in specific populations are necessary.
    Revista Brasileira de Cineantropometria e Desempenho Humano. 01/2007;