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Jump-In: Building Better Bones

NCT00729378 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 509

Last updated 2025-10-28

Study results available
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Summary

The Jump-In study will prospectively assess the effects of impact exercise on skeletal development in young girls, including bone mass, bone mineral density, and bone geometry. We hypothesize that girls who regularly participate in impact loading exercise will accrue greater skeletal mass, increase bone density and undergo structural adaptations that in combination will improve bone strength compared to girls who do not participate in impact exercise.

Conditions

  • Adolescent Development

Interventions

OTHER

Skeletal loading

Impact activities, 3 times per week, increasing the number of jumps (up to 40) and increasing height (from 6 inches to 24 inches per repetition) over the initial 8-weeks (2 months). New activities will be introduced approximately every 2-3 months in order to continually stress the skeleton over 2 years.

Sponsors & Collaborators

  • University of Arizona

    lead OTHER

Principal Investigators

  • Scott Going, Ph.D. · University of Arizona-Dept. of Nutritional Sciences

Study Design

Allocation
RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
NONE
Model
PARALLEL

Eligibility

Min Age
9 Years
Max Age
12 Years
Sex
FEMALE
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2007-04-30
Primary Completion
2012-04-30
Completion
2013-04-30

Countries

  • United States

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT00729378 on ClinicalTrials.gov