ABSTRACT
The most characteristic feature of the triathlon is integration of the three endurance activities including of swimming, cycling and running, into a continuous task. So, it is necessary to identify the cardiorespiratory responses during the triathlon to develop a beneficial training program. Twelve male triathletes conducted a simulated triathlon test in a laboratory. This test consisted of continuous swimming, cycling and running using a flumepool, a bicycle ergometer and a treadmill, respectively. The exercise intensity and duration were 60% of maximal oxygen uptake during swimming, cycling and running for 30, 75 and 45 min, respectively. The results demonstrated that the residual effects of the prior exercise stage were observed during the latter exercise stage : The prior swimming stage produced an increment of oxygen uptake and heart rate during the cycling stage ; Prior swimming and cycling stages increased oxygen uptake, minute ventilation, heart rate and ventilatory equivalent to those during the running stage. These results suggest that the residual effects of the preceding exercise decreased the mechanical and respiratory efficiency by increasing the physiological demands of conducting the subsequent exercise. Therefore, triathletes are recommended to train themselves in a continuous task rather than separately.
ABSTRACT
In this paper,we report the effective killing radius and the biological killing effects of the antitank mines after bursting to cut through a base deck of the tank.The mines had different types of structure and were exploded at various angles. It was found that the fragmentation damage was the primary killing factor and a blast wave came second, accompanied by a minor thermic burn. The incidence of the blast wave was higher than the casting structure when the antitank mines with separate layer structure were exploded, as compared to those with the casting structure, but there was no significant difference in the effective killing radius.