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Right atrium
The chamber of the heart that receives deoxygenated blood from the body through the superior and inferior vena cavae.
Right ventricle
The chamber of the heart that pumps deoxygenated blood to the lungs.
77.5
Life expectancy in the United States
Wellness
An expanded idea of health that includes the ability to live fully with vitality.
Tibia
One of the two bones in the lower leg, located inferior to the knee.
Fibula
The smaller of the two bones in the lower leg, located alongside the tibia.
Radius
One of the two bones of the lower arm, located on the lateral side of the forearm.
Ulna
The bone in the lower arm located on the medial side, opposite the radius.
Quadriceps
The muscle group located on the anterior of the femur.
Triceps
The muscle group located on the posterior of the humerus.
Lumbar region
The section of the spine that consists of five vertebrae.
Progressive overload
The training principle that suggests that as the amount of stress increases, fitness will also increase.
Mode of activity
The type or category of physical activity being performed.
Reversibility
The principle that fitness improvements can be lost after stopping exercise, but not all improvements are lost within two months.
Cardiac output
The total volume of blood that can be pumped by the heart in one minute.
Stroke volume
The amount of blood pumped by the heart with each beat.
VO2 max
A measure of the maximum amount of oxygen the body can utilize during intense exercise.
Aerobic exercise
Physical exercise that relies on the cardiovascular system to supply oxygen to the muscles.
Factors influencing VO2 max
Age, gender, specificity, and level of conditioning are all factors that affect VO2 max.
Plasma volume
The liquid component of blood that carries cells, proteins, and nutrients.
Low intensity steady state
A type of exercise performed at a low intensity over an extended period.
