NCT04549519

Brief Summary

Baseball batting is important to winning the games. Baseball batting is achieved by proximal-to-distal sequencing of body movements and controlled by the neuromuscular system. Poor lumbopelvic control could influence production and transfer of energy in the kinetic chain. This study aims to investigate the impact of lumbopelvic control in hitting mechanics and bat swing velocity in high school baseball players.

Trial Health

87
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
44

participants targeted

Target at P25-P50 for all trials

Timeline
Completed

Started Aug 2020

Geographic Reach
1 country

1 active site

Status
completed

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

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Study Timeline

Key milestones and dates

Study Start

First participant enrolled

August 17, 2020

Completed
6 days until next milestone

First Submitted

Initial submission to the registry

August 23, 2020

Completed
24 days until next milestone

First Posted

Study publicly available on registry

September 16, 2020

Completed
1.3 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

January 3, 2022

Completed
Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

January 3, 2022

Completed
Last Updated

November 9, 2023

Status Verified

November 1, 2023

Enrollment Period

1.4 years

First QC Date

August 23, 2020

Last Update Submit

November 7, 2023

Conditions

Athletes

Keywords

Batting mechanicsBat-swing velocityLumbopelvic control

Outcome Measures

Primary Outcomes (6)

  • Ratio of angular displacement of lumbar spine and hip joint

    Angular displacement of lumbar spine divided by angular displacement of hip joint

    1 week after enrolled

  • Bat-swing velocity

    Maximal bat swing velocity during baseball batting

    1 week after enrolled

  • Ratio of angular displacement of thoracic spine and lumbar spine

    Angular displacement of thoracic spine divided by angular displacement of lumbar spine

    1 week after enrolled

  • Timing of maximal angular velocity of hip joint

    The time point where the hip joint reaches its maximal angular velocity over the batting phase

    1 week after enrolled

  • Timing of maximal angular velocity of lumbar joint

    The time point where the lumbar joint reaches its maximal angular velocity over the batting phase

    1 week after enrolled

  • Timing of maximal angular velocity of thoracic joint

    The time point where the thoracic joint reaches its maximal angular velocity over the batting phase

    1 week after enrolled

Study Arms (2)

Stable group

Participants display knee valgus less or equal to 15° at 45° knee flexion in the descending phase of the squat on both legs

Other: No intervention

Unstable group

Participants display knee valgus greater than 15° at 45° knee flexion in the descending phase of the squat on one leg or both legs

Other: No intervention

Interventions

No interventionOTHER

No intervention / Compare the difference in batting mechanics and bat-swing velocity in baseball players with good and poor lumbopelvic control

Stable groupUnstable group

Eligibility Criteria

Age17 Years+
Sexall
Healthy VolunteersYes
Age GroupsChild (0-17), Adult (18-64), Older Adult (65+)
Sampling MethodNon-Probability Sample
Study Population

College baseball batters in the area of Tainan City

You may qualify if:

  • Sport specialization in baseball batting
  • Active players on college baseball teams

You may not qualify if:

  • History of surgery in the lumbar area
  • Severe musculoskeletal or neurological symptoms that interfere with participation in competition, training and test

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

National Cheng Kung University

Tainan, 701, Taiwan

Location

Study Design

Study Type
observational
Observational Model
OTHER
Time Perspective
CROSS SECTIONAL
Sponsor Type
OTHER
Responsible Party
PRINCIPAL INVESTIGATOR
PI Title
Assistant Professor

Study Record Dates

First Submitted

August 23, 2020

First Posted

September 16, 2020

Study Start

August 17, 2020

Primary Completion

January 3, 2022

Study Completion

January 3, 2022

Last Updated

November 9, 2023

Record last verified: 2023-11

Locations

TW(1)