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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...
Exercise and Cardiac Output01:17

Exercise and Cardiac Output

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 met...

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Related Experiment Video

Updated: Jun 10, 2026

Vascular Occlusion Training for Inclusion Body Myositis: A Novel Therapeutic Approach
09:01

Vascular Occlusion Training for Inclusion Body Myositis: A Novel Therapeutic Approach

Published on: June 5, 2010

Different training volumes yield equivalent increases in BMD.

R A Pierce1, L C Lee, C P Ahles

  • 1Department of Biological Science, Chapman University, Orange, California 92866, United States.

International Journal of Sports Medicine
|August 13, 2010
PubMed
Summary
This summary is machine-generated.

Resistance training effectively increases bone mineral density (BMD) and bone strength in growing male rats. However, exceeding a certain exercise threshold does not yield further bone benefits, suggesting a saturation point for bone formation.

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Dosage-Adjusted Resistance Training in Mice with a Reduced Risk of Muscle Damage
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Dosage-Adjusted Resistance Training in Mice with a Reduced Risk of Muscle Damage

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Last Updated: Jun 10, 2026

Vascular Occlusion Training for Inclusion Body Myositis: A Novel Therapeutic Approach
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Dosage-Adjusted Resistance Training in Mice with a Reduced Risk of Muscle Damage
07:29

Dosage-Adjusted Resistance Training in Mice with a Reduced Risk of Muscle Damage

Published on: August 31, 2022

Area of Science:

  • Exercise Physiology
  • Bone Biology
  • Animal Models

Background:

  • Bone mineral density (BMD) and strength are critical during growth periods.
  • Resistance training is a known stimulus for bone development.
  • The optimal exercise intensity or volume for bone adaptation in growing animals is not fully understood.

Purpose of the Study:

  • To investigate if an exercise threshold exists for stimulating bone mineral density (BMD) elevation.
  • To evaluate the impact of different resistance training volumes on bone health during growth.
  • To determine the effectiveness of resistance training in enhancing bone strength in male rats.

Main Methods:

  • 27 male rats were divided into Control, 3 ladder climbs/week (3LC), and 6 ladder climbs/week (6LC) resistance training groups.
  • Training involved climbing a vertical ladder with appended weights for 6 weeks, 3 days/week.
  • Left tibial bone mineral density and bone strength (force to failure) were measured post-training.

Main Results:

  • Both 3LC and 6LC groups showed significantly greater tibial BMD compared to the Control group.
  • Bone strength was significantly higher in both 3LC and 6LC groups versus the Control group.
  • No significant differences in BMD or bone strength were observed between the 3LC and 6LC groups.

Conclusions:

  • Both resistance training regimens were equally effective in improving BMD and bone strength in growing rats.
  • These findings suggest a stimulation threshold for bone formation, beyond which increased exercise volume provides no additional benefit.
  • Resistance exercise during growth can effectively enhance bone health, but excessive training load may not be necessary.