Related Experiment Video
Updated: Dec 23, 2025
09:50
Application of Chronic Stimulation to Study Contractile Activity-induced Rat Skeletal Muscle Phenotypic Adaptations
Published on: January 25, 2018
7.0K
Molecular Mechanisms Mediating Adaptation to Exercise
Zahra Gholamnezhad1,2, Bruno Mégarbane3, Ramin Rezaee4
1Neurogenic Inflammation Research Center, Mashhad University of Medical Sciences, Mashhad, Iran. gholamnezhadz@mums.ac.ir.
Advances in Experimental Medicine and Biology
|April 29, 2020
Summary
Regular exercise benefits physiological functions and combats diseases by modulating key cellular pathways. Future research should focus on standardized clinical trials to better understand exercise adaptation mechanisms.
Area of Science:
- Exercise physiology
- Molecular biology
- Cellular signaling
Background:
- Exercise impacts physiological functions during aging and disease.
- Cellular and molecular techniques reveal exercise's effects on signaling pathways.
Purpose of the Study:
- To review the molecular mechanisms of exercise adaptation.
- To highlight key signaling pathways affected by exercise.
- To identify limitations in current clinical trials and suggest improvements.
Main Methods:
- Review of experimental and human studies.
- Analysis of cellular and molecular data (proteomics, genomics).
- In vivo and in vitro experiments, including animal models.
Main Results:
- Exercise modulates crucial signaling pathways like calcineurin/NFAT, mTOR, myostatin/Smad, and AMPK/PGC-1α.
- These modulations drive cellular adaptation and muscle fiber remodeling.
- Current clinical trials face biases and limitations.
Conclusions:
- Exercise induces significant cellular adaptations through specific molecular pathways.
- Standardized, multicenter clinical trials are needed to overcome limitations.
- Considering individual variability and exercise parameters will enhance understanding of exercise outcomes.
Related Concept Videos
01:27Exercise and Muscle Performance
2.2K
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...
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...
2.2K
01:20Exercise and Cardiovascular Response
3.7K
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...
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...
3.7K
01:16Sympathetic Activation
6.5K
The sympathetic division can influence tissues and organs by releasing norepinephrine at peripheral synapses and distributing epinephrine and norepinephrine through the bloodstream. In times of crisis or stress, sympathetic activation occurs, which is regulated by sympathetic centers in the hypothalamus. As a result, sympathetic activation prepares the body for physical exertion, rapid ATP production, and heightened alertness, allowing individuals to respond effectively to challenging or...
6.5K
01:15Natural Selection and Adaptation
1.1K
Natural selection, a fundamental concept in evolutionary biology, is the mechanism by which evolution is driven, favoring organisms that are best adapted to their environments. This process enhances their chances of survival and reproduction. Adaptation, a key outcome of this process, involves genetic modifications that optimize an organism's functionality under specific environmental challenges, such as extreme cold or thinner air at high altitudes.
Beyond physical adaptations,...
Beyond physical adaptations,...
1.1K
01:24Muscle Recovery and Fatigue
3.8K
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...
3.8K
01:17Exercise and Cardiac Output
1.7K
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...
Sustained exercise increases the muscles' oxygen demand, which can be...
1.7K