Summary
Regular activity strengthens muscle, heart and bone and changes metabolism.
In depth
Heart rate, stroke volume and breathing increase; blood is redirected to muscles. Training lowers resting heart rate, increases muscle mass and strengthens bone.
Muscle blood flow increases up to 20-fold. Sweating dissipates heat. Fatigue has central and peripheral causes.
Key idea: regular exercise improves nearly all body systems.
At the onset of exercise, ATP comes first from creatine phosphate (seconds), then glycolysis (up to 1 to 2 minutes), then aerobic metabolism for prolonged efforts. VO2 max, the maximum oxygen uptake (about 35 to 40 mL/kg/min in average adults, and over 80 in elite endurance athletes), measures aerobic capacity. Oxygen debt (excess post-exercise oxygen consumption) restores creatine phosphate and clears lactate.
Heart rate increases roughly linearly with workload, and maximum is about 220 minus age (a rough estimate). Exercise benefits include lower risk of heart disease, diabetes, some cancers, depression and dementia. Overtraining and injury are risks, and heat illness occurs when sweating cannot keep up. Fluid and electrolyte balance matter.
Example: lactate is not the cause of next-day muscle soreness; that is from micro-damage.
Frequently asked questions
What is Exercise Physiology?
Regular activity strengthens muscle, heart and bone and changes metabolism.
Which area of biology covers Exercise Physiology, and how advanced is it?
Exercise Physiology is one of the 51 topics in Human Physiology. It is rated Beginner, so it suits learners who are starting out in biology. Related topics in this area include Exercise Adaptations, Energy Balance and Metabolism, Sleep Physiology.
Can you give an example of Exercise Physiology?
VO2 max measures aerobic fitness.
What should I learn before Exercise Physiology?
Exercise Physiology is a Beginner topic, so no earlier topic is required. Other Beginner topics in Human Physiology that pair well with it include Homeostasis, Tissues and Organs, Skeletal System.
What topics are related to Exercise Physiology?
The closest topics to Exercise Physiology are Exercise Adaptations, Energy Balance and Metabolism, Sleep Physiology, Cardiovascular Disease Mechanisms. Comparing them side by side is a good way to see how the ideas connect.
How can I check that I understand Exercise Physiology?
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Exercise Physiology. To practise the whole of Human Physiology, use the Human Physiology quiz.
How is Exercise Physiology different from Exercise Adaptations?
Exercise Physiology: Regular activity strengthens muscle, heart and bone and changes metabolism. Exercise Adaptations: Training increases stroke volume, capillary density and mitochondrial content in muscle. Read both side by side and note what each one explains.
How should I study Exercise Physiology step by step?
First, read the summary and write the definition in your own words. Second, read the in-depth section and note any example. Third, compare it with Exercise Adaptations and explain the difference aloud. Finally, take the Human Physiology quiz and come back to this page for any question you miss.