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Related Concept Videos

Exercise and Muscle Performance01:27

Exercise and Muscle Performance

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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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Metabolic States of the Body: Fasting and Starvation01:24

Metabolic States of the Body: Fasting and Starvation

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During the initial hours of fasting, the body uses up its glycogen stores as an energy source. Once these glycogen reserves are depleted, the body begins breaking down stored triglycerides and structural proteins. During this stage, glycerol becomes a key substrate for gluconeogenesis, while free fatty acids undergo beta-oxidation to provide energy for tissues, such as skeletal muscle. In the fasting state, the body spares protein breakdown as much as possible to conserve muscle and structural...
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Metabolic States of the Body: The Postabsorptive State01:18

Metabolic States of the Body: The Postabsorptive State

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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,...
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Overview of Metabolism01:40

Overview of Metabolism

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Living cells constantly carry out various chemical reactions which are necessary for their proper functioning. These reactions are interlinked to one another via multiple pathways. The collection of these chemical reactions is known as metabolism.
Plant Metabolism
Sunlight, the primary source of energy in plants, is first absorbed by the chlorophyll pigments present in their leaves. Plants then use this energy to carry out photosynthesis, where water is oxidized into oxygen and carbon dioxide...
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Exercise and Cardiovascular Response01:20

Exercise and Cardiovascular Response

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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...
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Overview of Carbohydrate Metabolism01:19

Overview of Carbohydrate Metabolism

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Carbohydrate metabolism is a fundamental biochemical process that ensures a constant supply of energy to living cells. The most important carbohydrate is glucose, which can be broken down via glycolysis to enter into the Krebs cycle and eventually lead to the production of ATP through oxidative phosphorylation.
Glucose transport into cells is facilitated by a family of transport proteins called GLUT (Glucose Transporters). GLUT4 is the primary glucose transporter for insulin-stimulated glucose...
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Related Experiment Video

Updated: Jul 31, 2025

Author Spotlight: Exploring the Impact of Reduced Resistance Exercise Volume on Metabolic Health
06:13

Author Spotlight: Exploring the Impact of Reduced Resistance Exercise Volume on Metabolic Health

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Ketogenic diets, exercise performance, and training adaptations.

Fernando Klitzke Borszcz1, Mariana Papini Gabiatti2, Ricardo Dantas de Lucas1

  • 1Physical Effort Laboratory, Sports Center, Federal University of Santa Catarina, University Campus, Pantanal.

Current Opinion in Clinical Nutrition and Metabolic Care
|May 5, 2023
PubMed
Summary

The ketogenic diet offers no performance benefits for athletes and may impair exercise capacity. High-carbohydrate diets are superior for maintaining physical performance and training adaptations.

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Measurement of Insulin- and Contraction-Stimulated Glucose Uptake in Isolated and Incubated Mature Skeletal Muscle from Mice
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Area of Science:

  • Sports Nutrition
  • Exercise Physiology
  • Metabolic Adaptations

Background:

  • The ketogenic diet, a very low-carbohydrate, high-fat diet, has gained attention as a potential nutritional strategy for athletes.
  • Understanding its impact on exercise performance and training adaptations is crucial for sports science.

Conclusions:

  • The ketogenic diet is not a recommended nutritional strategy for athletes seeking performance or training benefits.
  • It offers no advantages over traditional carbohydrate-based diets for exercise performance and adaptation.