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Related Concept Videos

Bicarbonate-Carbonic Acid Buffer01:22

Bicarbonate-Carbonic Acid Buffer

The carbonic acid-bicarbonate buffer system is critical for maintaining the body's pH balance. It operates on the equilibrium:
Roles of Electrolytes: Chloride and Bicarbonate01:29

Roles of Electrolytes: Chloride and Bicarbonate

Chloride ions contribute to the osmotic pressure gradient distinguishing the intracellular fluid (ICF) from the extracellular fluid (ECF). They counterbalance positively charged ions in the ECF and ensure its electrochemical stability. The renal system's process of chloride absorption and release generally mirrors that of sodium ions.
Conditions such as hypochloremia can arise from insufficient chloride reabsorption by the kidneys, often compounded by extended bouts of diarrhea, vomiting, or...
Carbon Dioxide Transport in the Blood01:19

Carbon Dioxide Transport in the Blood

Carbon dioxide (CO2) transport in the blood is critical to human physiology. On average, our body cells produce around 200 mL of CO2 per minute, precisely the quantity expelled by the lungs. This process involves the transportation of CO2 from the tissue cells to the lungs in three primary forms.
Forms of CO2 Transport
1. Dissolved in plasma: A small percentage (7-10%) of CO2 is transported and dissolved directly in the plasma.
2. Carbaminohemoglobin: Just over 20% of CO2 is chemically bound to...
Diagnosing Acidosis and Alkalosis01:24

Diagnosing Acidosis and Alkalosis

Diagnosing acid-base imbalances involves systematically analyzing arterial blood samples, focusing on three key measurements: pH, bicarbonate (HCO3−) concentration, and carbon dioxide partial pressure (PCO2). This analysis follows a four-step process that helps identify the imbalance's underlying cause and nature.
First, the pH level is assessed to determine whether the blood pH is normal (7.35–7.45), low (acidosis), or high (alkalosis).
Next, the PCO2  and HCO3−  values are examined to...
Introduction to Electrolytes01:33

Introduction to Electrolytes

In humans, electrolytes play a vital role in various physiological processes. Balancing electrolyte levels is essential for normal body functions; their imbalance can be life-threatening. The major electrolytes include sodium, potassium, chloride, calcium, phosphate, and bicarbonate. They are primarily involved in physiological processes, such as nerve signal transmission, membrane trafficking, muscle contraction, buffering body fluids, and balancing water levels in the body.
Role of Sodium
One...
Respiratory Regulation of Acid-Base Balance01:18

Respiratory Regulation of Acid-Base Balance

Respiratory compensation is a vital physiological process that stabilizes blood plasma pH by regulating the partial pressure of carbon dioxide (PCO2), a key determinant of pH levels. Most carbon dioxide in the blood dissolves and converts into carbonic acid (H2CO3). It dissociates into hydrogen ions (H+) and bicarbonate ions (HCO3⁻). There is also an inverse relationship between PCO2​​ and pH.
When carbon dioxide levels increase in the blood, more H+ and HCO3⁻ are produced, leading to a...

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Related Experiment Video

Updated: May 10, 2026

A Rapidly Incremented Tethered-Swimming Maximal Protocol for Cardiorespiratory Assessment of Swimmers
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Practical considerations for bicarbonate loading and sports performance.

Louise M Burke1

  • 1Sports Nutrition, Australian Institute of Sport, Bruce, ACT, Australia.

Nestle Nutrition Institute Workshop Series
|June 15, 2013
PubMed
Summary
This summary is machine-generated.

Sodium bicarbonate supplementation, or "bicarbonate loading," can improve athletic performance by buffering acid buildup during intense exercise. Further research is needed to optimize its use for specific athletes and events.

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Area of Science:

  • Sports Science
  • Exercise Physiology
  • Biochemistry

Background:

  • High-intensity exercise leads to intracellular acidity, limiting performance.
  • Extracellular buffering capacity is crucial for managing metabolic byproducts.
  • Sodium bicarbonate supplementation temporarily increases blood bicarbonate levels.

Purpose of the Study:

  • To evaluate the ergogenic potential of sodium bicarbonate supplementation.
  • To assess its effects on performance in various exercise durations.
  • To explore practical considerations and future research directions for bicarbonate loading.

Main Methods:

  • Administration of sodium bicarbonate (300 mg/kg) 1-2 hours before exercise.
  • Focus on events involving high rates of anaerobic glycolysis.
  • Review of existing studies on bicarbonate loading strategies.

Main Results:

  • Bicarbonate loading enhances extracellular buffering of hydrogen ions.
  • Moderate positive effects on performance in 1-7 minute strenuous exercise bouts.
  • Potential benefits for prolonged intermittent or sustained high-intensity exercise.

Conclusions:

  • Sodium bicarbonate serves as an ergogenic aid for specific athletic demands.
  • Further investigation is required to optimize individualized strategies.
  • Practical limitations like gastrointestinal discomfort warrant consideration.