Evaluation of a compressed program for shoulder external rotation strength in handball

ISRCTN ISRCTN19694168
DOI https://doi.org/10.1186/ISRCTN19694168
Submission date
17/09/2019
Registration date
18/09/2019
Last edited
13/08/2021
Recruitment status
No longer recruiting
Overall study status
Completed
Condition category
Other
Prospectively registered
Protocol
Statistical analysis plan
Results
Individual participant data

Plain English summary of protocol

Background and study aims
Many handball players have shoulder pain while playing handball. The throwing shoulder is vulnerable for injuries due to repetitive throwing and tackles. A recent study demonstrated that it is possible to reduce the problem by more than 25%. Despite this reduction in shoulder problems, less than one-third of the coaches and players would continue using the whole program the next season, because 'the program was too time-consuming'. Shoulder external rotation weakness is assumed to be a risk factor for shoulder injuries in handball. Therefore, the compressed program to increase external rotation strength was developed. The aim of this study is to examine the effect of the new, compressed shoulder external strength program in youth handball.

Who can participate?
Handball players aged 16 to 18 who play in clubs located in or close to Oslo

What does the study involve?
Six female and male youth 16-18 handball teams will be invited to participate in this study. The researchers will randomly allocate within each team to one exercise group and one control group. The exercise program will be implemented after regular handball training three times a week for eight weeks in the intervention group. The program consists of two shoulder external rotation strength exercises with variations and progressions, aimed to increase shoulder external rotation strength. One dedicated physiotherapist will deliver and supervise the program in the teams once or twice a week. The program will take about ten minutes to complete. Both groups will continue doing their regular training.

What are the possible benefits and risks of participating?
Increasing shoulder external rotation strength, which is a risk factor for shoulder injuries in handball, is a possible benefit in the intervention group. All the participants will be offered the training program after the intervention is finished. There are no known risks of participating.

Where is the study run from?
Oslo Sports Trauma Research Center / Norwegian School of Sport Science (Norway)

When is the study starting and how long is it expected to run for?
January 2019 to December 2020

Who is funding the study?
The Oslo Sports Trauma Research Center has been established at the Norwegian School of Sport Sciences through generous grants from the Royal Norwegian Ministry of Culture, the South-Eastern Norway Regional Health Authority, the International Olympic Committee, the Norwegian Olympic Committee & Confederation of Sport, and Norsk Tipping AS

Who is the main contact?
Mrs Hilde Fredriksen
hilde.fredriksen@nih.no

Contact information

Mrs Hilde Fredriksen
Scientific

Kikkutveien 4b
Oslo
0491
Norway

ORCiD logoORCID ID 0000-0002-5158-7716
Phone +47 (0)99709997
Email hilde.fredriksen@nih.no

Study information

Study designRandomized controlled trial
Primary study designInterventional
Secondary study designRandomised controlled trial
Study setting(s)Other
Study typeOther
Participant information sheet Only available in Norwegian. Please use the contact details to request a participant information sheet
Scientific titleEvaluation of a compressed program for shoulder external rotation strength in handball. A randomized controlled study among adolescent handball players
Study objectivesThe aim of this study is to examine the effect of a new, compressed shoulder ER strength program in handball.
Ethics approval(s)Approved 17/09/2019, Norwegian regional committee for medical and health research ethics, South East region (REK sør-øst, Pb 1130 Blindern, 0318 Oslo, Norway; Email: rek-sorost@medisin.uio.no), ref: 2019/1301/REK sør-øst
Health condition(s) or problem(s) studiedShoulder strength training in healthy adolescent handball players
InterventionSix female and male youth 16-18 handball teams will be invited to participate in this study. The researchers will conduct single randomization within each team to one exercise group and one control group. The exercise program will be implemented after regular handball training three times a week for eight weeks in the intervention group. The program consists of two shoulder external rotation (ER) strength exercises with variations and progressions, aimed to increase shoulder ER strength. One dedicated physiotherapist will deliver and supervise the program in the teams once or twice a week. The program will take about ten minutes to complete. Both groups will continue doing their regular training.
Intervention typeOther
Primary outcome measureShoulder external rotation strength is measured using a handheld dynamometer (MicroFET, Hoggan Health Industries, Salt Lake City, Utah, USA) at baseline and after 8 weeks of intervention
Secondary outcome measuresShoulder internal rotation range of motion is measured using a digital goniometer (Easyangle, Meloq AB, Stockholm, Sweden) at baseline and after 8 weeks of intervention
Overall study start date01/01/2019
Completion date31/12/2019

Eligibility

Participant type(s)Healthy volunteer
Age groupOther
SexBoth
Target number of participants72
Total final enrolment92
Key inclusion criteria1. Handball players
2. Aged 16 to 18 years
3. Play handball in clubs located in or close to Oslo
Key exclusion criteriaTeams who participated in a similar study last year
Date of first enrolment23/09/2019
Date of final enrolment03/10/2019

Locations

Countries of recruitment

  • Norway

Study participating centre

Oslo Sports Trauma Research Center/ Norwegian School of Sport Science
Sognsveien 220
Oslo
0806
Norway

Sponsor information

Oslo Sports Trauma Research Center, Norwegian School of Sports Sciences
University/education

Sognsveien 220
Oslo
0863
Norway

Phone +47 (0)23 26 20 00
Email postmottak@nih.no
Website http://nih.no
ROR logo "ROR" https://ror.org/018ct3570

Funders

Funder type

Government

The Oslo Sports Trauma Research Center has been established at the Norwegian School of Sport Sciences through generous grants from the Royal Norwegian Ministry of Culture, the South-Eastern Norway Regional Health Authority, the International Olympic Committee, the Norwegian Olympic Committee & Confederation of Sport, and Norsk Tipping AS

No information available

Results and Publications

Intention to publish date30/04/2021
Individual participant data (IPD) Intention to shareYes
IPD sharing plan summaryAvailable on request
Publication and dissemination planThe researchers plan to publish the results in 2020.
IPD sharing planThe datasets generated during and/or analysed during the current study are/will be available upon request from Hilde Fredriksen (hilde.fredriksen@nih.no). De-identified raw data will be available from the date the article is published. The data will be available for meta-analyses by researchers doing the same type of studies, looking at shoulder strength in athletes.

Study outputs

Output type Details Date created Date added Peer reviewed? Patient-facing?
Protocol file 18/09/2019 18/09/2019 No No
Protocol file 29/06/2020 29/06/2020 No No
Results article 01/04/2021 13/08/2021 Yes No

Additional files

ISRCTN19694168_PROTOCOL_18Sep19.docx
Uploaded 18/09/2019
ISRCTN19694168_PROTOCOL_29Jun20.docx
Uploaded 29/06/2020

Editorial Notes

13/08/2021: Internal review.
19/04/2021: Publication reference added.
16/03/2021: The intention to publish date has been changed from 01/09/2020 to 30/04/2021.
29/06/2020: Uploaded protocol 29 June 2020 (not peer reviewed).
06/03/2020: Internal review.
04/11/2019: The following changes have been made:
1. The recruitment end date has been changed from 13/10/2019 to 03/10/2019.
2. The final enrolment number was added.
3. The overall trial end date was changed from 31/12/2020 to 31/12/2019.
08/10/2019: Trial's existence confirmed by ethics committee.
18/09/2019: Uploaded protocol 18 September 2019 (not peer reviewed).