NCT06924775

Jump Rope Training and Shoulder Isokinetics in CrossFit

Impact of Jump Rope Training on the Isokinetic Shoulder Profile in CrossFit Practitioners

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 18 (actual)
• Sponsor: University of Americas · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

The goal of this quasi-experimental clinical trial is to evaluate whether weighted jump rope (WJR) training can improve the isokinetic shoulder strength profile in male and female CrossFit practitioners. The main questions it aims to answer are: * Does six weeks of WJR training affect internal and external shoulder rotational peak torque relative to body mass? * Does WJR influence the external/internal shoulder rotation ratio in dominant and non-dominant arms at varying angular velocities? Researchers will compare pre- and post-intervention isokinetic measurements to see if WJR training leads to significant changes in shoulder strength and balance. Participants will: * Incorporate WJR sessions three times per week into their usual CrossFit training. * Undergo isokinetic testing of both shoulders at baseline and post-intervention at 60°/s, 180°/s, and 300°/s. * Have their training adherence and technique monitored throughout the study.

Detailed description

Model: Single Group Model Description: This study followed a single-arm, quasi-experimental pre-post design in which all participants underwent the same intervention: six weeks of weighted jump rope (WJR) training, integrated into their regular CrossFit routines. The intervention's impact on isokinetic shoulder strength variables was assessed by comparing pre- and post-intervention measures within the same group of participants. Number of Arms 1, Only one group received the intervention-there was no control or comparator group. Masking Outcomes Assessor. Masking Description: Due to the nature of the physical intervention (WJR training), blinding participants and care providers was not feasible. However, outcome assessors conducting the isokinetic tests were blinded to the study's hypotheses and group allocations to reduce measurement bias. Allocation N/A. Participants were not randomly assigned but instead enrolled in a single group to undergo the same intervention protocol. Enrollment 18 participants

Conditions

• Evaluation of the Effects of Weighted Jump Rope Training on the Isokinetic Shoulder Profile in CrossFit Practitioners

Interventions

Type	Name	Description
OTHER	Weighted jump rope training	Unlike isolated jump rope studies, this intervention was embedded within the participants' habitual CrossFit routine, enhancing ecological validity. Performing the jump rope protocol immediately prior to regular training-rather than as a stand-alone session-was intended to promote warm-up and neuromuscular priming benefits. The use of a weighted rope introduced a resistance stimulus that is rarely incorporated in jump rope interventions.

Timeline

• Start date: 2022-07-30
• Primary completion: 2023-01-30
• Completion: 2023-03-30
• First posted: 2025-04-11
• Last updated: 2025-04-11

Locations

1 site across 1 country: Chile