Related Experiment Video
Updated: Jul 20, 2026
09:32
Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion
Published on: April 11, 2018
Adaptive skeletal responses to mechanical loading during adolescence.
David A Greene1, Geraldine A Naughton
1School of Exercise Science, Centre of Physical Activity Across the Lifespan (CoPAAL), Australian Catholic University, Strathfield, New South Wales, Australia. david.greene@acu.edu.au
Sports Medicine (Auckland, N.Z.)
|August 30, 2006
Summary
Adolescent bone health benefits from weight-bearing exercise, especially high-impact activities. Further research is needed to understand the long-term skeletal benefits of physical activity during this critical growth period.
Area of Science:
- Orthopedics
- Pediatric Endocrinology
- Sports Medicine
Background:
- Adolescence is a critical period for bone mass accumulation.
- Weight-bearing mechanical loading positively influences skeletal development.
- Limited research exists on adolescent skeletal responses to mechanical loading.
Purpose of the Study:
- To examine skeletal responses to mechanical loading during adolescence.
- To investigate the osteogenic effects of different physical activities in adolescents.
- To highlight the importance of understanding adolescent musculoskeletal health.
Main Methods:
- Review of existing literature on physical activity and adolescent bone health.
- Analysis of studies using unilateral loading activities (e.g., tennis) for direct skeletal comparison.
- Discussion of advanced imaging technologies (e.g., pQCT, MRI) for musculoskeletal assessment.
Main Results:
- Weight-bearing activities, particularly high-impact sports, show greater osteogenic potential.
- Unilateral loading provides a controlled method to study site-specific skeletal adaptations.
- Evidence suggests positive skeletal adaptations, but long-term sustainability requires further investigation.
Conclusions:
- Adolescent physical activity is crucial for optimizing bone mass accrual.
- High-impact and unilateral loading activities offer significant skeletal benefits.
- Integrating 3D imaging with densitometry is vital for a comprehensive understanding of adolescent bone health.
Related Concept Videos
01:09Changes in the Appendicular Skeleton with Age
The upper and lower limb initially develops as a small bulge called a limb bud, which appears on the lateral side of the early embryo. The upper limb bud appears near the end of the fourth week of development, with the lower limb bud appearing shortly after.
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...
01:40Bone Remodeling
Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.
01:20Introduction to the Skeletal System
The skeletal system is the central framework of the body, consisting of different connective tissues: bones, cartilage, tendons, and ligaments.
Components of the Skeletal System
Bone, or osseous tissue, is a hard connective tissue that forms an internal support structure for the human body. Bones shield vulnerable organs and soft tissue from external forces. For example, the vertebral bones protect and support the spinal cord.
Cartilage, a semi-rigid connective tissue found in regions such as...
Components of the Skeletal System
Bone, or osseous tissue, is a hard connective tissue that forms an internal support structure for the human body. Bones shield vulnerable organs and soft tissue from external forces. For example, the vertebral bones protect and support the spinal cord.
Cartilage, a semi-rigid connective tissue found in regions such as...
01:15Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity
Deformation occurs in axial and transverse directions when an axial load is applied to a slender bar. This deformation impacts the cubic element within the bar, transforming it into either a rectangular parallelepiped or a rhombus, contingent on its orientation. This transformation process induces shearing strain. Axial loading elicits both shearing and normal strains. Applying an axial load instigates equal normal and shearing stresses on elements oriented at a 45° angle to the load axis.
01:07Development of the Limb Synovial Joints
Joints form during embryonic development in conjunction with the formation and growth of the associated bones. The embryonic tissue that gives rise to all bones, cartilage, and connective tissues of the body is called mesenchyme.
The mesenchymal stem cells differentiate into chondrocytes that form the hyaline cartilage, and later the cartilaginous model of the bone. This model further transforms into a bone. This process is known as endochondral ossification.
During development, the limbs...
The mesenchymal stem cells differentiate into chondrocytes that form the hyaline cartilage, and later the cartilaginous model of the bone. This model further transforms into a bone. This process is known as endochondral ossification.
During development, the limbs...
01:20Normal Strain under Axial Loading
Normal strain under axial loading is an important concept in the field of mechanics of materials. Axial loading implies the application of a force along the axis of a material, like a column or bar. This force can either compress or stretch the material. In the context of axial loading, normal strain is the deformation experienced by the material in the direction of the loading force. It's calculated as the change in length divided by the original length of the material. This unitless ratio...