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Hormones and Bone Tissue01:17

Hormones and Bone Tissue

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Bone formation, or ossification, begins around the sixth to seventh week of embryonic development. Most bones develop from a cartilaginous template through the process of endochondral ossification. Cartilage formation begins when clusters of mesenchymal cells differentiate into chondrocytes. These chondrocytes proliferate rapidly and secrete an extracellular matrix that becomes encased in a membrane called the perichondrium. The resulting cartilage model provides a template that resembles the...
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Fractures: Bone Repair01:27

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Related Experiment Video

Updated: Jun 16, 2026

Non-invasive Assessments of Subjective and Objective Recovery Characteristics Following an Exhaustive Jump Protocol
08:21

Non-invasive Assessments of Subjective and Objective Recovery Characteristics Following an Exhaustive Jump Protocol

Published on: June 8, 2017

Osteogenic index and changes in bone markers during a jump training program: a pilot study.

Christina R Erickson1, Matthew D Vukovich

  • 1Human Performance Laboratory, HPER Department, South Dakota State University, Brookings, SD, USA.

Medicine and Science in Sports and Exercise
|February 9, 2010
PubMed
Summary
This summary is machine-generated.

High-impact jump training enhances bone health in young men. Splitting daily jumps into two sessions with recovery periods may boost bone turnover more effectively than single sessions.

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Area of Science:

  • Exercise physiology
  • Bone biology
  • Sports science

Background:

  • Bone health is crucial for athletic performance and injury prevention.
  • High-impact exercises are known to stimulate bone remodeling.
  • Understanding optimal training parameters for bone adaptation is essential.

Purpose of the Study:

  • To evaluate the osteogenic index (OI) and bone marker changes during an 8-week jump training program.
  • To compare the effects of one versus two daily jump sessions on bone turnover.
  • To assess the impact of recovery periods between exercise sessions.

Main Methods:

  • A proof-of-concept study involving 21 male participants (7 controls, 14 intervention).
  • Intervention groups performed jump exercises (Plyo Press) once (J1x) or twice (J2x) daily, with 6-hour recovery for J2x.
  • Blood samples analyzed for bone-specific alkaline phosphatase and C-terminal telopeptides of type I collagen at baseline, 4, and 8 weeks.

Main Results:

  • Significant differences in OI between J1x and J2x groups.
  • Bone-specific alkaline phosphatase increased significantly over 8 weeks in both jumping groups, with J2x showing a greater mean change.
  • No significant changes observed in C-terminal telopeptides of type I collagen.

Conclusions:

  • High-impact exercise, like jump training, positively affects bone in young adult males.
  • Implementing recovery periods between daily jump sessions may enhance osteogenic effects on bone turnover.
  • Further research is needed to fully understand the OI's role in designing bone-influencing exercise programs.