Heart rate monitors can be used to estimate TEE during exercise because a linear relationship exists between heart rate and oxygen consumption.Group startsTrue or FalseTrue, unselectedFalse

Exercise is associated with alterations to many basic physiological processes, including changes in metabolism and the cardiovascular system.  As the intensity of exercise rises, both the cardiac output and oxygen consumption increase, as shown in Figure 1.Figure 1  Changes in cardiac output and oxygen consumption in response to various levels of exerciseThe cardiac output CO represents the volume of blood pumped by the heart in 1 minute.  The CO is calculated from the heart rate HR and stroke volume SV using the equationCO = HR ∙ SVEquation 1Experimental data has shown that the HR increases linearly with the exercise output Eout, leading to the relationshipHR = 0.65 ∙ Eout + 75Equation 2The metabolism of nutrients consumes oxygen and generates carbon dioxide as a waste product.  The amount of carbon dioxide generated depends on the type of macronutrient that is consumed.  For example, when carbohydrates are metabolized, every liter of oxygen consumed causes the generation of 1.0 liter of carbon dioxide.  Alternatively, the metabolism of fats leads to 0.7 liters of carbon dioxide per liter of oxygen, and the metabolism of proteins generates 0.8 liters of carbon dioxide for each liter of oxygen. Question 56While exercising on a treadmill, a person has a cardiac output of 15 L/min and produces carbon dioxide at 0.091 mol/min.  What is their ratio of metabolizing carbohydrates to fats during the exercise?  (Assume all gasses are ideal and are at STP.)A.1:2B.1:1C.1:0D.2:1Submit

Heart rate is not a good indicator of the intensity of an exercise. True False

When are wearable fitness trackers most accurate for accounting for calorie expenditure?Select one:a.Only when wearing a chest-strap heart rate monitorb.At restc.Moderate-intensity activityd.During high-intensity exercise

Heart rate monitors work by measuring which of the following physiological signals: Pulse pressure Electrical conduction Korotkoff sounds Contraction force

What measurements are required to accurately estimate activity-related caloric expenditure utilizing wearable technology?Select one:a.Active heart rateb.Rating of Perceived Exertion (RPE)c.Active heart rate, gender, age, and weightd.Gender, age, and weight