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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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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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Cross-bridge Cycle01:26

Cross-bridge Cycle

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As muscle contracts, the overlap between the thin and thick filaments increases, decreasing the length of the sarcomere—the contractile unit of the muscle—using energy in the form of ATP. At the molecular level, this is a cyclic, multistep process that involves binding and hydrolysis of ATP, and movement of actin by myosin.
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The Effect of Aging on Tissues01:19

The Effect of Aging on Tissues

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Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
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Exercise and Cardiac Output01:17

Exercise and Cardiac Output

1.8K
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...
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Bone Disorders01:29

Bone Disorders

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Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
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Related Experiment Video

Updated: Jan 15, 2026

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

Hye Soo Chung1, Kyung Mook Choi2

  • 1Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, Hallym University, Chuncheon, Korea.

Diabetes & Metabolism Journal
|January 14, 2026
PubMed
Summary
This summary is machine-generated.

Exerkines, exercise-induced molecules, are key to understanding and treating sarcopenia, a muscle-loss disorder. These signaling factors mediate exercise benefits, offering new therapeutic strategies for age-related muscle decline.

Keywords:
Adipose tissueAgingExerciseLiverMuscle, skeletalSarcopenia

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Area of Science:

  • Exercise physiology
  • Molecular biology
  • Gerontology

Background:

  • Sarcopenia is an age-related muscle disorder impacting mobility and independence.
  • Exercise is a primary intervention, but its molecular mechanisms are not fully understood.
  • Exerkines are emerging as critical mediators of exercise's systemic benefits.

Purpose of the Study:

  • To review recently identified exerkines relevant to skeletal muscle.
  • To explore exerkines' role in sarcopenia pathophysiology.
  • To overview exerkine responses to different exercise types for sarcopenia management.

Main Methods:

  • Literature review of exerkine research.
  • Analysis of exerkine signaling in skeletal muscle physiology.
  • Synthesis of data on exercise modality effects on exerkine profiles.

Main Results:

  • Exerkines are secreted by various tissues and act via autocrine, paracrine, and endocrine pathways.
  • They regulate muscle regeneration, mitochondrial function, inflammation, and metabolism.
  • Exerkine secretion and function are modulated by exercise parameters (mode, intensity, duration).

Conclusions:

  • Exerkine signaling is crucial for interorgan communication and exercise adaptation.
  • Understanding exerkines offers novel therapeutic targets for sarcopenia.
  • Targeting exerkines may benefit individuals unable to exercise regularly.