Determinants of performance in 1,500-m runners
| Autor: | Ferri A. 1, 2, Adamo S. 1, La Torre A. 3, Marzorati M. 4, Bishop D.J. 5, Miserocchi G. 1 |
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| Přispěvatelé: | Ferri, A, Adamo, S, La Torre, A, Marzorati, M, Bishop, D, Miserocchi, G |
| Rok vydání: | 2011 |
| Předmět: |
Male
Physiology Bohr effect spettroscopia nel vicino infrarosso Quadriceps Muscle Running Hemoglobins Blood lactate Orthopedics and Sports Medicine Treadmill Spectroscopy Near-Infrared Chemistry VO2 max General Medicine Middle-distance runners Muscle Fatigue Linear Model medicine.symptom Human Muscle contraction Muscle Contraction cinetica consumo di ossigeno medicine.medical_specialty Vastus lateralis muscle Settore BIO/09 - FISIOLOGIA Athletic Performance Young Adult Oxygen Consumption Near-infrared spectroscopy Physiology (medical) Internal medicine medicine Humans Hemoglobin Lactic Acid Least-Squares Analysis Kinetic Least-Squares Analysi Oxygen uptake kinetics Muscle fatigue Skeletal muscle bioenergetics Public Health Environmental and Occupational Health Surgery Kinetics Endocrinology Biological Marker Exercise Test Linear Models Pulmonary Ventilation Biomarkers |
| Zdroj: | European journal of applied physiology 112 (2012): 3033–3043. doi:10.1007/s00421-011-2251-2 info:cnr-pdr/source/autori:Ferri A. 1,2, Adamo S. 1, La Torre A. 3, Marzorati M. 4, Bishop D.J. 5, Miserocchi G. 1/titolo:Determinants of performance in 1,500-m runners./doi:10.1007%2Fs00421-011-2251-2/rivista:European journal of applied physiology (Print)/anno:2012/pagina_da:3033/pagina_a:3043/intervallo_pagine:3033–3043/volume:112 |
| ISSN: | 1439-6327 |
| DOI: | 10.1007/s00421-011-2251-2 |
| Popis: | Our aim was to investigate the relationship between physiological variables (not previously studied) and performance in elite 1,500-m runners. We assessed eight male athletes with an average personal best time of 233.3 ± 6.9 s (110% of the world record) for the 1,500-m race. Ventilatory measurements, maximal oxygen consumption VO2max maximal vastus lateralis muscle deoxygenation (∆[deoxy(Hb+Mb)])max via near-infrared spectroscopy (NIRS), and maximal velocity (V (max)) were obtained during an incremental treadmill test. During subsequent constant-speed exercise at Vmax, we determined the time to exhaustion (Tlim), end-exercise blood lactate concentration ([La]b(max)), VO2 and ∆[deoxy(Hb+Mb)] kinetics parameters. The mean VO2max, [La]b(max) and Vmax were 70.2 ± 3.9 mL kg(-1) min(-1), 12.7 ± 2.4 mmol L(-1), 21.5 ± 0.5 km h(-1), respectively. VO2 at Vmax showed a significant negative correlation with Tlim, whereas [La]b(max) was positively correlated with Tlim. Race speed was found to significantly correlate with ∆[deoxy(Hb+Mb)](max) (79% of maximal value obtained during a transient limb ischemia), ∆[deoxy(Hb+Mb)] slow component (22.9 ± 9.3% of total amplitude) and [La]b(max) at Vmax. [La]b(max) at Vmax was also significantly correlated with ∆[deoxy(Hb+Mb)] slow component, suggesting a greater release of oxygen from the hemoglobin due to the Bohr effect. We conclude that both the maximal capacity of muscle to extract O2 from the blood and the end-exercise blood lactate accumulation are important predictors of best performance in 1,500-m runners. |
| Databáze: | OpenAIRE |
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