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Related Concept Videos

Metabolic Rate01:25

Metabolic Rate

The human body is a powerhouse of energy, with every cell performing numerous functions that require energy. This energy production and consumption is measured by the metabolic rate, which quantifies the total heat generated by all the body's chemical reactions and mechanical work. This measurement helps to determine the rate of kilocalorie (kcal) consumption needed to fuel all ongoing activities.
The Basal Metabolic Rate (BMR) measures the energy expended at rest.
Several factors influence the...
Exercise and Cardiac Output01:17

Exercise and Cardiac Output

Regular physical activity is essential for maintaining cardiovascular health, with aerobic exercises being particularly effective. According to the American Heart Association, 150 minutes of moderate to intense aerobic exercise per week is recommended for a healthy heart. Aerobic activities may include brisk walking, running, bicycling, cross-country skiing, and swimming, ideally performed three to five times per week.
Sustained exercise increases the muscles' oxygen demand, which can be met...
Muscle Recovery and Fatigue01:24

Muscle Recovery and Fatigue

Muscle fatigue refers to the decline in a muscle's ability to maintain the force of contraction after prolonged activity. It primarily stems from changes within muscle fibers. Even before experiencing muscle fatigue, one may feel tired and have the urge to stop the activity. This response, known as central fatigue, occurs due to changes in the central nervous system, namely the brain and spinal cord. While there is no single mechanism that induces fatigue, it may serve as a protective response...
Exercise and Cardiovascular Response01:20

Exercise and Cardiovascular Response

Exercise significantly impacts cardiovascular response, which is crucial for understanding patient health and designing effective treatment plans.
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...
Metabolic States of the Body: The Postabsorptive State01:18

Metabolic States of the Body: The Postabsorptive State

The postabsorptive state usually starts about four hours after a meal and lasts until the next meal is eaten. During this time, the digestive system stops absorbing nutrients, and the body uses stored energy reserves to maintain stable blood glucose levels.
Initially, glycogen stored in the liver is broken down to release glucose into the bloodstream, while glycogen in the muscles is broken down to supply glucose for energy directly within the muscle cells. As glycogen stores diminish,...
Exercise and Muscle Performance01:27

Exercise and Muscle Performance

Exercise induces a range of adaptations in muscle tissue, depending on the type and duration of activity. Such physical training can be broadly categorized into two types: endurance exercises and resistance exercises.
Endurance exercises
Endurance exercises involve running, swimming, or cycling, which require repetitive movements with low force output. When a person engages in endurance exercise, a few noticeable changes occur in their skeletal muscles. For instance, the number of capillaries...

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A Rapidly Incremented Tethered-Swimming Maximal Protocol for Cardiorespiratory Assessment of Swimmers
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Resting metabolic rate after endurance exercise training.

Man-Gyoon Lee1, Darlene A Sedlock, Michael G Flynn

  • 1Graduate School of Physical Education, Kyung Hee University, Suwon, Korea.

Medicine and Science in Sports and Exercise
|June 12, 2009
PubMed
Summary

Endurance exercise training did not alter resting metabolic rate (RMR) in young men. However, training may prevent RMR decline and potentially increase fat oxidation, suggesting exercise benefits for metabolic health.

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Published on: November 11, 2021

Area of Science:

  • Exercise Physiology
  • Metabolic Research

Background:

  • Resting metabolic rate (RMR) is a key determinant of daily energy expenditure.
  • Understanding factors influencing RMR, such as exercise training, is crucial for metabolic health and weight management.

Purpose of the Study:

  • To investigate the impact of a 12-week endurance exercise program on RMR.
  • To explore potential mechanisms behind exercise-induced changes in RMR.

Main Methods:

  • A 12-week endurance training program (jogging/running) was conducted in an exercise group (EX, n=9).
  • A control group (CON, n=10) maintained usual activity.
  • Measurements included body composition, VO2max, RMR, and various hormones/metabolites before and after the intervention.

Main Results:

  • Exercise training significantly increased VO2max in the EX group.
  • RMR did not change significantly in the EX group post-training.
  • Free thyroxine decreased and free fatty acids increased significantly in the EX group.
  • RMR significantly decreased in the CON group, potentially due to seasonal variations.

Conclusions:

  • Endurance training did not alter RMR in young men.
  • Exercise training may prevent a decline in RMR observed in the control group.
  • Training-induced increases in fat oxidation might contribute to maintaining RMR.