UMIN-CTR Clinical Trial

Public title

The differences in choice reaction time with changes in trunk tilt and lumbar lordosis angle in Sitting Volleyball

Acronym

The choice reaction time in Sitting Volleyball

Scientific Title

The differences in choice reaction time with changes in trunk tilt and lumbar lordosis angle in Sitting Volleyball

Scientific Title:Acronym

The choice reaction time in Sitting Volleyball

Region

Japan

Condition

adult

Classification by specialty

Adult

Classification by malignancy

Others

Genomic information

NO

Narrative objectives1

Sitting Volleyball (SV) is a para-sport mainly played by lower limb disabilities. Players are required to respond quickly to the ball in the sitting position.
For quick responses in the standing position, it is desirable to tilt the trunk forward 1), and the reaction time decreases as the lumbar lordosis angle increases 2). Similarly, SV players are generally coached to tilt their trunk forward with an upright pelvis. However, there are as many players tilt their trunk backward as tilt their trunk forward. It is likely that tilting the trunk backward can move quicker. Trunk tilt and lumbar lordosis angle may affect choice reaction time (CRT) in the sitting position as well as standing position, even though their relationship is unclear.
This study aimed to clarify the influence of the trunk tilt and lumbar lordosis angle on CRT in the sitting position.

Basic objectives2

Efficacy

Basic objectives -Others

Trial characteristics_1

Trial characteristics_2

Developmental phase

Primary outcomes

1.choice reaction time
2.lumbar lordosis angle

Both 1 and 2 are measured on the day of measurement

Key secondary outcomes

age
hight
body weight
BMI
sports history

Study type

Interventional

Basic design

Single arm

Randomization

Non-randomized

Randomization unit

Blinding

Open -no one is blinded

Control

Self control

Stratification

Dynamic allocation

Institution consideration

Blocking

Concealment

No. of arms

1

Purpose of intervention

Educational,Counseling,Training

Type of intervention

Other

Interventions/Control_1

RT was measured by Reaction MR(Takei Scientific Instruments, Japan.). Subjects sat on the center mat placed 1.5 meters ahead of the lamp with their hip and knee joints flexed in forward tilt posture(FTP)and backward tilt posture(BTP). They were instructed to move to left or right direction as soon as possible after light emission. The trunk tilt angle was set at 0 degree when the line joining the acromion and greater trochanter was vertical to the floor. FTP and BTP were defined as trunk forward and backward tilt angles of 20 degree and 30 degree, respectively.
The lumbar lordosis angle at start position was measured by Spinal Mouse(Index, Japan).
Intervention is only on the day of measurement.The measurement is performed three time.

Interventions/Control_2

Interventions/Control_3

Interventions/Control_4

Interventions/Control_5

Interventions/Control_6

Interventions/Control_7

Interventions/Control_8

Interventions/Control_9

Interventions/Control_10

Age-lower limit

20

years-old

<=

Age-upper limit

35

years-old

>=

Gender

Male and Female

Key inclusion criteria

1.Men and women between the age of 20 and 35 at the time of consent
2.At least 5 years of sports experience
3.Those who have written consent to participate in this study

Key exclusion criteria

1.People with orthopedic disease on upper limb, lower limb and trunk at the time of consent
2.People who are deemed inappropriate by the researcher to conduct this research
3.The researcher and the research target are in a teacher-student relationship, and the student is taking a lecture from the researcher

Target sample size

40

Name of lead principal investigator

1st name	Yukio
Middle name
Last name	Urabe

Organization

Graduate School of Hiroshima University

Division name

Biomedical & Health Sciences

Zip code

734-8553

Address

1-2-3, Kasumi, Minami-ku, Hiroshima, Japan

TEL

082-257-5405

Email

yurabe@hiroshima-u.ac.jp

Name of contact person

1st name	Noriaki
Middle name
Last name	Maeda

Organization

Graduate School of Hiroshima University

Division name

Biomedical & Health Sciences

Zip code

734-8553

Address

1-2-3, Kasumi, Minami-ku, Hiroshima, Japan

TEL

082-257-5410

Homepage URL

Email

norimmi@hiroshima-u.ac.jp

Institute

Department of Sport Rehabilitation
Graduate School of Biomedical and Health Science Hiroshima University
1-2-3 Kasumi, Minami-ku, Hiroshima
Japan

Institute

Department

Personal name

Organization

None

Organization

Division

Category of Funding Organization

Self funding

Nationality of Funding Organization

Co-sponsor

Name of secondary funder(s)

Organization

Hiroshima University Certified Ethics Committee

Address

1-2-3, Kasumi, Minami-ku, Hiroshima, Japan

Tel

082-257-5555

Email

protocol@cimr.hiroshima-u.ac.jp

Secondary IDs

NO

Study ID_1

Org. issuing International ID_1

Study ID_2

Org. issuing International ID_2

IND to MHLW

Institutions

Date of disclosure of the study information

2020

Year

01

Month

15

Day

URL releasing protocol

Publication of results

Unpublished

URL related to results and publications

Number of participants that the trial has enrolled

30

Results

Results date posted

Results Delayed

Results Delay Reason

Date of the first journal publication of results

Baseline Characteristics

Participant flow

Adverse events

Outcome measures

Plan to share IPD

IPD sharing Plan description

Recruitment status

Completed

Date of protocol fixation

2020

Year

01

Month

14

Day

Date of IRB

2020

Year

01

Month

14

Day

Anticipated trial start date

2020

Year

01

Month

14

Day

Last follow-up date

2024

Year

03

Month

31

Day

Date of closure to data entry

Date trial data considered complete

Date analysis concluded

Other related information

Registered date

2020

Year

01

Month

15

Day

Last modified on

2021

Year

01

Month

14

Day

Link to view the page

Value
https://center6.umin.ac.jp/cgi-open-bin/ctr_e/ctr_view.cgi?recptno=R000044043