CI

At a glance

ClinicalIndex Comparison Record
N/ACompleted· 509 enrolled
Drug / intervention
Skeletal loadingother
Likely dose
Not stated in record
Structured eligibility isn't available for this trial yet — see the full criteria in the Eligibility tab below.

Standardized by ClinicalIndex from the ClinicalTrials.gov record · verify against the source.

Search/NCT00729378
NCT00729378N/ACompleted

Exercise and Bone Development in Young Girls

University of Arizona·interventional·Posted Aug 7, 2008·Updated Oct 28, 2025

In Brief

A clinical study evaluating Skeletal loading for Adolescent Development. Completed, enrolled 509 participants across 1 site.

Detailed 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.

Study Details

Study Typeinterventional
Allocation--
Masking--
Primary Purpose--
CountriesUnited States
Collaborators--

Timeline

N/ACompletedFinished
200720082009201020112012201320142015201620172018201920202021202220232024202520262027
First PostedAug 7, 2008
Enrollment StartApr 1, 2007
Primary CompletionApr 1, 2012
Study CompletionApr 1, 2013
TodayJul 2, 2026
Enrollment to primary: 5 yearsPosted 17.9 years ago

Interventions

Skeletal loadingother

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.