The aim of this study was to quantify and describe the exercise intensity of @entity88 mountaineering racing, and to identify the best physiological predictors of @entity88 mountaineering racing. Before participating in the race in which heart rate (HR) and speed were continuously recorded, 10 trained @entity88 -mountaineers performed a field maximal test to determine the first ventilatory threshold (VT1) and the @entity1576 ( @entity1576 ) in order to establish 3 exercise intensity zones (Z1: below VT1, Z2: between VT1 and @entity1576 , and Z3: above @entity1576 ). Energy cost (EC) of each subject was estimated on the HR/ @entity4962 relationship obtained during the field maximal test. VT1 and @entity1576 threshold were equal to 84.2  3.0 and 94.5  1.7% of HR (max). Race time was significantly correlated with V  O2max (r = -0.87), VT1 (r = -0.82) and @entity1576 (r = -0.85) expressed for body mass unit. The mean race time and the mean HR were 101  11   min and 93.4  1.8% of HR (max). The % race time spent in Z1, Z2 and Z3, were 7.0  4.8, 51.3  4.7 and 42.0  6.5%, respectively. The mean value of EC during the two uphill of the race was 14.3  2.6 J x kg(-1) x m(-1). HR and speed decreased significantly during the second uphill whereas EC increased significantly by    15%. Data obtained in the present study represent the first qualitative description of physiology demand of @entity88 mountaineering racing. The long period of time spent just below and above @entity1576 suggest that @entity88 -mountaineering can be viewed as one of the most strenuous endurance sports like cross-country skiing, running and off-road biking. In addition to high aerobic capacities, body mass seems to appear as a key factor given that performance in @entity88 mountaineering is strongly correlated to relative common physiological variables. The changes of HR, speed and EC during the second uphill, which indicate the prevalence of fatigue, confirm the exhaustive character of @entity88 mountaineering.

Physiology of XXXX mountaineering racing.

@entity4962 :: ('CHEBI:30046', 'Chemical') :: ['V  O2'] @entity1576 :: ('MESH:D012131', 'Disease') :: ['respiratory compensation threshold', 'RCT'] @entity88 :: ('6497', 'Gene') :: ['ski']
@entity88 :: (6497,Gene) :: ['ski']
