| Aerobic Capacity | A measure of aerobic or cardiovascular fitness.
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| Anemia | A condition in which hemoglobin and the blood's oxygen carrying capacity is below normal.
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| Anaerobic Activities | Physical activities performed at an intensity that exceeds the body's capacity to supply oxygen.
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| Heart Rate Reserve | The difference between your maximum heart rate (highest heart rate in vigorous activity) and your resting heart rate (lowest heart rate at rest).
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| Hemoglobin | Oxygen-carrying pigment of the red blood cells.
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| Maximum Oxygen Uptake (VO2 Max) | A laboratory measure held to be the best measure of cardiovascular fitness. Commonly referred to as VO2 max or the volume (V) of oxygen used when a person reaches his or her maximum (max) ability to supply it during exercise.
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| Oxygen Uptake Reserve (VO2R) | The difference between your maximum oxygen uptake and your resting oxygen uptake. A percentage of this value is often used to determine appropriate intensities for physical activities.
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| Ratings of Perceived Exertion (RPE) | The assessment of the intensity of exercise based on how the participant feels; a subjective assessment of effort.
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