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1.
J Hum Kinet ; 51: 193-200, 2016 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-28149382

RESUMO

The aim of this study was to verify the power of VO2max, peak treadmill running velocity (PTV), and running economy (RE), unadjusted or allometrically adjusted, in predicting 10 km running performance. Eighteen male endurance runners performed: 1) an incremental test to exhaustion to determine VO2max and PTV; 2) a constant submaximal run at 12 km·h-1 on an outdoor track for RE determination; and 3) a 10 km running race. Unadjusted (VO2max, PTV and RE) and adjusted variables (VO2max0.72, PTV0.72 and RE0.60) were investigated through independent multiple regression models to predict 10 km running race time. There were no significant correlations between 10 km running time and either the adjusted or unadjusted VO2max. Significant correlations (p < 0.01) were found between 10 km running time and adjusted and unadjusted RE and PTV, providing models with effect size > 0.84 and power > 0.88. The allometrically adjusted predictive model was composed of PTV0.72 and RE0.60 and explained 83% of the variance in 10 km running time with a standard error of the estimate (SEE) of 1.5 min. The unadjusted model composed of a single PVT accounted for 72% of the variance in 10 km running time (SEE of 1.9 min). Both regression models provided powerful estimates of 10 km running time; however, the unadjusted PTV may provide an uncomplicated estimation.

2.
Rev. bras. med. esporte ; Rev. bras. med. esporte;17(2): 84-87, mar.-abr. 2011. ilus, tab
Artigo em Português | LILACS | ID: lil-591369

RESUMO

Por mais de 30 anos, a Professora Doutora Maria Augusta Peduti Dal Molin Kiss atuou efetivamente no desenvolvimento das ciências do esporte no Brasil. Após esse período dedicado à produção de conhecimento e formação de pessoal, mais um ciclo da sua carreira se completa. Dessa forma, o objetivo deste artigo de revisão foi homenageá-la na ocasião de sua aposentadoria, abordando os principais fatores morfofuncionais determinantes do desempenho na escalada esportiva. Diversos achados indicam que a massa corporal, o percentual de gordura corporal, a força de preensão manual, o metabolismo aeróbio e anaeróbio alático, bem como a economia de movimento, são fundamentais para o sucesso nesse esporte. Para nós é um privilégio ter participado dessa trajetória brilhante da professora Kiss e homenageá-la com esse trabalho de revisão.


During over thirty years, Doctor Maria Augusta Peduti Dal' Molin Kiss has contributed effectively to the sports sciences development in Brazil. After this long period dedicated to the consolidation of knowledge and human resources in this area, another life cycle is fully completed in her career. Thus, the objective of this review is to honor Doctor Kiss in the occasion of her retirement, while showing the main anthropometric and physiological determinants of indoor climbing performance. Several findings indicate that body mass, body fat percentage, handgrip force, aerobic and alactic anaerobic metabolism, and movement economy are crucial to success in this sport. We feel privileged to have been involved in her brilliant carrier and to honor Doctor Kiss with this review.


Assuntos
Desempenho Atlético , Composição Corporal , Esportes/fisiologia , Lactatos/sangue , Consumo de Oxigênio
3.
J Strength Cond Res ; 23(2): 571-8, 2009 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-19209079

RESUMO

This study investigated clinic and ambulatory blood pressure (BP) responses after a single bout of low-intensity resistance exercise in normotensive subjects. Fifteen healthy subjects underwent 2 experimental sessions: control-40 minutes of seated rest, and exercise-6 resistance exercises, with 3 sets of as many repetitions as possible until moderate fatigue, with an intensity of 50% of 1-repetition maximum (1RM). Before and for 60 minutes after interventions, clinic BP was measured by auscultatory and oscillometric methods. Postintervention ambulatory BP levels were also measured for 24 hours. In comparison with preintervention values, clinic systolic BP, as measured by the auscultatory method, did not change in the control group, but it decreased after exercise (-3.7 +/- 1.6 mm Hg, p < 0.05). Diastolic and mean BP levels increased after intervention in the control group (+3.4 +/- 1.0 and +3.0 +/- 0.8 mm Hg, respectively, p < 0.05) and decreased in the exercise group (-3.6 +/- 1.7 and -3.4 +/- 1.4 mm Hg, respectively, p < 0.05). Systolic and mean oscillometric BP levels did not change after interventions either in the control or exercise sessions, whereas diastolic BP increased after intervention in the control group (+5.0 +/- 1.7 mm Hg, p < 0.05) but not change after exercise. Ambulatory BP behaviors after interventions were similar in the control and exercise sessions. Significant and positive correlations were observed between preexercise values and postexercise clinic and ambulatory BP decreases. In conclusion, in the whole sample, a single bout of low-intensity resistance exercise decreased postexercise BP under clinic, but not ambulatory, conditions. However, considering individual responses, postexercise clinic and ambulatory hypotensive effects were greater in subjects with higher preexercise BP levels.


Assuntos
Monitorização Ambulatorial da Pressão Arterial , Pressão Sanguínea , Treinamento Resistido , Adolescente , Adulto , Determinação da Pressão Arterial/métodos , Feminino , Humanos , Masculino , Adulto Jovem
4.
Rev. bras. ciênc. mov ; 15(1): 61-67, 2007. tab
Artigo em Português | LILACS | ID: lil-524662

RESUMO

O objetivo do estudo foi estudar a relação entre massa muscular estimada a partir da circunferência muscular de membros inferiores e o salto vertical. Foram avaliadas 9 mulheres atletas de voleibol com idade de 18 (±1) anos e tempo de prática de 7 (±2) anos, que treinavam 4 vezes por semana, com sessão diária de treino de 3 horas. Foram coletados peso (72,99±8,54kg), estatura (177,79±6,57cm), adiposidade (26,18±6,08%), circunferências de coxa (CC=61,00±4,58cm) e perna (CP=37,44±2,02cm). Foram também determinadas as circunferênciasde coxa corrigida (CCc=52,79±3,92cm) e perna (CPc=35,17±2,02cm) a partir da subtração do anel de gordura. O desempenho de salto foi determinado pelos testes Vertical Jump (VJ=43,33±4,30cm) e Vertical Power Jump (VPJ=34,00±3,35cm). A associação das variáveis CC, CCc, CP e CPc com VPJ e VJ, dada pela correlação de Pearson (p<0,05), apresentou valor significante somente entre CP e VJ (-0,67). Acreditamos que o fato dos músculos envolvidos na extensão de joelhos serem caracterizados por baixa velocidade de contração, enquanto que os músculos envolvidos na flexão plantar por elevada velocidade de contração, possam explicar os fenômenos encontrados, visto que a velocidade de contração é fator de grande importância na geração de potência muscular, consequentemente, no deslocamento vertical. Ainda, comportamentos variados entre as associações de salto e antropometria são reportados na literatura, mostrando que tais associações parecem ser dependentes da amostra analisada.Assim, concluímos que as circunferências de coxa e de panturrilha, mesmo quando corrigidospelas respectivas dobras cutâneas, parecem não ser determinantes do desempenho do salto vertical.


The purpose of the study was to study the relationship between lower limbs muscle circumference and vertical jump. Female athletes of volleyball with age of 18 (±1) years, practical time of 7 (±2) years, and that trained 4 times per week, during 3 hours a day are analyzed; Variables measurements are: weight (72,99±8,54kg), height (177,79±6,57cm), adiposity(26.18±6.08%), muscle circumferences of thigh (CC=61,00±4,58cm) and middle calf(CP=37,44±2,02cm). Corrected circumferences of thigh (CCc=52,79±3,92cm) and middle calf (CPc=35,17±2,02cm) are calculated, from the subtraction of the fat ring. The jump performance was determined by Vertical Jump Test (VJ=43.33±4.30cm) and Vertical Power Jump Test (VPJ=34.00±3.35cm). Association of the variables, given by the Pearson’s correlation (p<0.05), showed significantly values between CP and VJ (-0,67). Authors believe that the factof the involved muscles in the extension of knees to be characterized by slow twitch muscle fiber, whereas the involved muscles in the plantar flexion to be characterized fast stitch muscle fiber, could be explain the correlations found; contraction speed is an important factor in the generation of power and the body vertical displacement. Different behaviors of the associations between jump and anthropometry variables are reported in literature, showing that associations are dependent of the analyzed sample. We conclude that the circumferences of thigh and middle calf, even when corrected for the respective skinfold, do not determine the performance in vertical jump.


Assuntos
Humanos , Feminino , Adulto , Antropometria , Desempenho Psicomotor/fisiologia , Músculos , Esforço Físico , Esportes
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