There are two athletes, Athlete A has a VO2max of 40 mL \cdot kg^{-1} \cdot min^{-1} and Athlete B has a VO2max of 70 mL \cdot kg^{-1} \cdot min^{-1}. Analyzing oxygen uptake kinetics, what do you expect to see in regard to steady-state O2 consumption? Athlete B will have a longer time period to reach steady state. Athlete A will have a shorter time period to reach steady state. Athlete A and B will have the same time period to reach steady state. Athlete B will have a shorter time period to reach steady state.
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VO2max represents the maximum rate of oxygen consumption during exercise. Show more…
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A sedentary adult consumes about 0.05 L of O_2 in 10 seconds. A sprinter, running a 100 m race, consumes about 1 L of $O_{2}$ in 10 seconds. After finishing the race, the sprinter continues to breathe at an elevated (but declining) rate for some minutes, consuming an extra $4 \mathrm{L}$ of $\mathrm{O}_{2}$ above the amount consumed by the sedentary individual. (a) Why does the need for $\mathrm{O}_{2}$ increase dramatically during the sprint? (b) Why does the demand for $\mathrm{O}_{2}$ remain high after the sprint is completed?
The physical fitness of athletes is measured by ${ }^{4} V_{\mathrm{O}_{2}}$ max," which is the maximum volume of oxygen consumed by an individual during incremental exercise (for example, on a treadmill). An average male has a $V_{\mathrm{O}_{2}}$ max of $45 \mathrm{~mL} \mathrm{O}_{2} / \mathrm{kg}$ body mass $/ \mathrm{min}$, but a world-class male athlete can have a $V_{\mathrm{O}_{2}}$ max reading of $88.0 \mathrm{~mL} \mathrm{O}_{2} / \mathrm{kg}$ body mass/min. (a) Calculate the volume of oxygen, in mL, consumed in $1 \mathrm{hr}$ by an average man who weighs $85 \mathrm{~kg}$ and has a $V_{\mathrm{O}_{2}}$ max reading of $47.5 \mathrm{~mL}$ $\mathrm{O}_{2} / \mathrm{kg}$ body mass $/ \mathrm{min} .(\mathbf{b})$ If this man lost $10 \mathrm{~kg},$ exercised, and increased his $V_{\mathrm{O}_{2}}$ max to $65.0 \mathrm{~mL} \mathrm{O}_{2} / \mathrm{kg}$ body mass $/ \mathrm{min}$, how many mL of oxygen would he consume in $1 \mathrm{hr} ?$
The physical fitness of athletes is measured by " $V_{\mathrm{O}_{2}}$ max," which is the maximum volume of oxygen consumed by an individual during incremental exercise (for example, on a treadmill). An average male has a $V_{\mathrm{O}_{2}}$ max of $45 \mathrm{~mL} \mathrm{O}_{2} / \mathrm{kg}$ body mass $/ \mathrm{min}$, but a world-class male athlete can have a $V_{\mathrm{O}_{2}}$ max reading of $88.0 \mathrm{~mL} \mathrm{O}_{2} / \mathrm{kg}$ body mass $/ \mathrm{min.}$ (a) Calculate the volume of oxygen, in mL, consumed in 1 hr by an average man who weighs 185 lbs and has a $V_{\mathrm{O}_{2}}$ max reading of 47.5 $\mathrm{mL} \mathrm{O}_{2} / \mathrm{kg}$ body mass $/ \mathrm{min}$ (b) If this man lost $20 \mathrm{lb}$, exercised, and increased his $V_{\mathrm{O}_{2}}$ max to $65.0 \mathrm{~mL} \mathrm{O}_{2} / \mathrm{kg}$ body mass $/ \mathrm{min}$, how many mL of oxygen would he consume in $1 \mathrm{hr}$ ?
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