TY - JOUR
T1 - Determinants of performance in 1500-m runners
AU - Ferri, Alessandra
AU - Adamo, Saverio
AU - Torre, Antonio La
AU - Marzorati, Mauro
AU - Bishop, David J.
AU - Miserocchi, Giuseppe
PY - 2012
Y1 - 2012
N2 - 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 (D[deoxy(Hb+Mb)])max via near-infrared spectroscopy (NIRS), and maximal velocity (Vmax) 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]bmax), VO2 and D[deoxy(Hb+Mb)] kinetics parameters. The mean VO2max; [La]bmax 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]bmax was positively correlated with Tlim. Race speed was found to significantly correlate with D[deoxy(Hb+Mb)]max (79% of maximal value obtained during a transient limb ischemia), D[deoxy(Hb+Mb)] slow component (22.9 ± 9.3% of total
amplitude) and [La]bmax at Vmax. [La]bmax at Vmax was also significantly correlated with D[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.
AB - 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 (D[deoxy(Hb+Mb)])max via near-infrared spectroscopy (NIRS), and maximal velocity (Vmax) 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]bmax), VO2 and D[deoxy(Hb+Mb)] kinetics parameters. The mean VO2max; [La]bmax 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]bmax was positively correlated with Tlim. Race speed was found to significantly correlate with D[deoxy(Hb+Mb)]max (79% of maximal value obtained during a transient limb ischemia), D[deoxy(Hb+Mb)] slow component (22.9 ± 9.3% of total
amplitude) and [La]bmax at Vmax. [La]bmax at Vmax was also significantly correlated with D[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.
KW - Near-infrared spectroscopy
KW - Oxygen uptake kinetics
KW - cinetica consumo di ossigeno
KW - spettroscopia nel vicino infrarosso
KW - Near-infrared spectroscopy
KW - Oxygen uptake kinetics
KW - cinetica consumo di ossigeno
KW - spettroscopia nel vicino infrarosso
UR - http://hdl.handle.net/10807/56987
UR - http://dx.medra.org/10.1007/s00421-011-2251-2
U2 - 10.1007/s00421-011-2251-2
DO - 10.1007/s00421-011-2251-2
M3 - Article
SN - 1439-6319
VL - 112
SP - 3033
EP - 3043
JO - European Journal of Applied Physiology
JF - European Journal of Applied Physiology
ER -