Aim: To examine the physiological responses (VO2max), in fourteen French University students (21.9±0.9 years), during a running exercise 30s-30s (30s run at MAV45-15 /30s rest) runway (Rw) Vs 30s-30s (30s run at MAV45-15 /30s rest) treadmill (Tr) and to find the running exercise intensity that allows to obtain the comparable maximal oxygen uptake in both 30s-30s exercise. Methods: Oxygen uptake (VO2), heart rate (HR), the time spent at 90% VO2max (T90%VO2max), respiratory quotient (QR) and lactate concentration ([La]) were measured in 14 subjects during 4 intermittent exercises sessions. First session: Fitness intermittent test 45-15 to determine the Maximal aerobic velocity 45-15 (MAV45-15); Second session: 30s-30s Rw (30 s run at MAV45-15 – 30 s rest ); Third session: 30-30 s Tr (30 s run at MAV45-15 – 30 s rest ); Fourth session: 30-30 s Tr (30 s run at MAV45-15 +15% –30 s rest ) the Fitness intermittent test 45-15 and in three different sessions of 30s-30s running exercies for 15 min. Results: VO2max average and T90%VO2max were significantly (P<0.001) lower in the running exercise 30s/30s on treadmill (VO2max: 55.1 ml/kg/min Rw vs 49.8 Tr ml/kg/min; T90%VO2max: 39% Rw vs 8% Tr). Increasing by 15% the MAV45-15 during the 30s-30s Tr (Tr+15%), obtained comparable physiological parameters to 30s-30s Rw (VO2max: 55.1 ml/kg/min Rw vs 53.7 Tr+15% ml/kg/min; T90%VO2max: 39% Rw vs 39% Tr+15%). The [La] was significatly higer during 30s-30s Tr+15% in comparaison to other two exercice modalities (13.0 mmol/l Tr+15% vs 9.20 mmol/l Rw; 13.0 mmol/l Tr+15% vs 6.30 mmol/l Tr). Conclusions: The results suggested that the increase by 15% of MAV45-15, during a running exercise 30s-30s Tr, can obtain the comparable aerobic solicitation to 30s-30s Rw.
|Titolo:||Physiological responses of intermittent exercise 30s-30s Treadmill Vs Runway|
LA TORRE, ANTONIO (Penultimo)
|Settore Scientifico Disciplinare:||Settore M-EDF/02 - Metodi e Didattiche delle Attivita' Sportive|
|Data di pubblicazione:||set-2015|
|Digital Object Identifier (DOI):||10.1007/s11332-015-0234-0|
|Appare nelle tipologie:||01 - Articolo su periodico|