Physical Activity
Any bodily movement produced by contracting skeletal muscles, with an increase in energy expenditure.
Exercise
Planned,
... [Show More] purposeful, repetitive
Physical Fitness
Attributes or characteristics that individuals have achieved that related to their ability to perform physical activity
3 metabolic pathways the body uses to creates ATP
1. Creatine Phosphate
2. anaerobic glycolysis
3. 0xidative system
Claudication
pain in the leg is induced by exercise, usually because of an artery obstruction.
Creatine Phosphate system
Small amounts of CP are stored within each cell. Simple one-to-one trade off that allows for the rapid production of ATP. ONLY for use during short bouts of exercise. less that 10 seconds.
Anaerobic glycolysis
No oxygen required. NExt most immediate energy source. break down carbs (glucose or glycogen) into pyruvate. Used during medium-duration exercise. no more than about 90 seconds.
Aerobic glycolysis (oxidative system)
Oxygen dependent. As exercise intensity decreases allowing for longer duration activities, use of the oxidative system increases. (Krebs cycle and ETC). Produce ATP in the mitochondria of the cell--requires oxygen. Lasts longer than 1-2 minutes.
What is VO2?
The volume of oxygen the body consumes. VO2 max is the highest volume of oxygen the body can consume.
Define Stroke Volume
the volume of blood the heart ejects with each beat.
How does SV increase with workload?
Similar to HR, it increases as workload increases but only up to ~40% to 60% of VO2max. The percentages can be decreases in sedentary individuals and increased with training.
What happens to resting HR as stroke volume increases?
it decreases, as more blood being pumped per beat allows the heart to beat less often.
What is cardiac output?
a measure of blood pumped per minute. The product of stroke volume and heart rate.
What does Diastolic Blood pressure do during exercise?
Remains stable or decreases slightly. [Show Less]