The below graph shows both ventilation and blood lactate concentration as a function of total oxygen consumption during a bout of exercise. Explain the relationship between these two variables and why these two measures (ventilatory threshold and lactate threshold) tend to occur around the same level of exercise intensity. Ventilation, L-min¹ 170 150 130 110 90 70 50 30 10 • Ventilation Lactic Acid 0.5 Ventilatory threshold Anaerobic threshold 12 11 10 3 2 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 Oxygen Consumption, L-min Lactic Acid, mM.L

During maximal aerobic exercise, exercise-induced arterial hypoxemia may result in elite endurance athletes due to which of the following?     reduced venous return leads to decreased pulmonary capillary flow rate     transit time through the pulmonary capillaries is much shorter     oxygen diffusion capacity is no longer calculated using capillary mean PO2     lower venous O2 content increases the PO2 gradient

please help with this practice problem

Ilike Running is training for a marathon.  While training, his volume of air in each breath is 1.5 L and he takes approximately 15 breaths per minute.  His total lung capacity is 5500 mL and his residual volume is 1500 mL.  Ilike has a blood pH of 7.2 and his cardiac output is 4.95 L/min.  His heart is pumping 172 times per minutes.   Finally, his expiratory reserve volume is 750 mL.  In order to increase his performance, Ilike wants an analysis of his current exercise values.  Please determine the following based on the information listed above.  Answe the following Blank 1: Tidal Volume Blank 2: Vital Capacity Blank 3: Ventilation Blank 4: Stroke Volume Blank 5: Inspiratory Reserve Volume:

3.0f what importance is VO2max to endurance performance? Why does the competitor with the highest VO2max not always win?

Explain the physiological and pathophysiological changes that occur with ascent to altitude.  Provide examples  Provide Steps.

If you jog at an 11.6 MET intensity , how much oxygen would you be utilizing in ml/kg /min?

describe the relationship between oxygen consumption & oxygen uptake, and between carbon dioxide production & carbon dioxide unloading? please describe in detail.

Start by defining RER and explain how and why the resting value is established (think back to bioenergetics). Next, explain how and WHY (again, this requires an understanding of bioenergetics) RER changes as exercise intensity is increased (think VT and RCP). Hints: consider the points where the production of a gas increases drastically and why this occurs. Furthermore, consider that VT is often used to approximate AT. Also keep in mind the endogenous buffering systems.

What is the RER of an individual with an oxygen consumption of 220 ml/min and a carbon dioxide production of 182.6 ml/min? Report your answer to 2 decimal points. QUESTION 29 What percent of the individual's oxygen consumption in the previous question is being used to combust carbohydrate for energy? Round your answer to the nearest whole number and answer with a number only as units are given in the question.