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Related Concept Videos

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...
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...
Overview of Protein Metabolism01:21

Overview of Protein Metabolism

Proteins are broken down into amino acids during digestion. Unlike fats and carbohydrates, which are stored for later use, proteins are not. Instead, amino acids are either used to produce ATP through oxidation or contribute to the creation of new proteins for the growth and repair of the body. Any surplus amino acids from the diet are converted into glucose or triglycerides rather than excreted.
Amino acids play various roles in the body once they are absorbed into cells. They are restructured...
The Proteasome02:18

The Proteasome

Eukaryotic cells can degrade proteins through several pathways. One of the most important amongst these is the ubiquitin-proteasome pathway. It helps the cell eliminate the misfolded, damaged, or unwarranted cytoplasmic proteins in a highly specific manner.
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. A series of enzymes carry out the ubiquitination of the target proteins - E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3...
The Proteasome01:13

The Proteasome

Eukaryotic cells can degrade proteins through several pathways. One of the most important among these is the ubiquitin-proteasome pathway. It helps the cell eliminate the misfolded, damaged, or unwarranted cytoplasmic proteins in a highly specific manner.
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. This involves participation of a series of enzymes including— E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3 (ubiquitin...
Protein Digestion01:02

Protein Digestion

Protein digestion begins in the stomach, where the highly acidic environment can easily disrupt protein structure by exposing the peptide bonds of polypeptide chains. After polypeptide chains are broken into individual amino acids by a series of digestive enzymes, the amino acids are transported to the liver via the bloodstream to produce energy.

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Related Experiment Video

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Improving Strength, Power, Muscle Aerobic Capacity, and Glucose Tolerance through Short-term Progressive Strength Training Among Elderly People
12:59

Improving Strength, Power, Muscle Aerobic Capacity, and Glucose Tolerance through Short-term Progressive Strength Training Among Elderly People

Published on: July 5, 2017

Protease supplementation improves muscle function after eccentric exercise.

Thomas W Buford1, Matthew B Cooke, Liz L Redd

  • 1Exercise and Biochemical Nutrition Laboratory, Baylor University, Waco, TX 76798, USA.

Medicine and Science in Sports and Exercise
|September 4, 2009
PubMed
Summary
This summary is machine-generated.

Protease supplementation may reduce muscle damage and inflammation after eccentric exercise. This study found that protease supplements helped maintain muscle strength and regulate inflammatory markers.

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Area of Science:

  • Exercise physiology
  • Nutritional biochemistry
  • Skeletal muscle research

Background:

  • Eccentric exercise can cause muscle damage and inflammation.
  • Protease supplementation is proposed to aid recovery by modulating inflammatory responses.

Purpose of the Study:

  • To evaluate the effectiveness of protease supplementation in reducing skeletal muscle damage and inflammation induced by eccentric exercise.
  • To assess the impact of protease supplementation on muscle function recovery post-exercise.

Main Methods:

  • Randomized controlled trial involving 29 participants consuming either a protease supplement or placebo for 21 days.
  • Eccentric exercise protocol (downhill treadmill running) followed by muscle function tests and blood sample analysis.
  • Analysis of inflammatory markers (e.g., cyclooxygenase 2, interleukins) and leukocyte activity.

Main Results:

  • The protease group exhibited significantly higher peak torque, indicating better force production after exercise.
  • Significant group-by-time interactions showed increased eosinophils and basophils in the protease group.
  • Lower levels of serum cyclooxygenase 2, interleukin 6, and interleukin 12 were observed in the protease group.

Conclusions:

  • Protease supplementation appears to attenuate muscle strength loss following eccentric exercise.
  • The mechanism involves the regulation of leukocyte activity and inflammatory pathways.
  • Protease supplements may be beneficial for exercise recovery and reducing exercise-induced inflammation.