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Trial registered on ANZCTR


Registration number
ACTRN12612000278831
Ethics application status
Approved
Date submitted
7/03/2012
Date registered
9/03/2012
Date last updated
9/03/2012
Type of registration
Retrospectively registered

Titles & IDs
Public title
Effects of resistance training in adolescent rugby union players
Scientific title
Effect of resistance training on lower body muscular strength and power in adolescent rugby union players
Secondary ID [1] 280086 0
Nil
Universal Trial Number (UTN)
Trial acronym
Linked study record

Health condition
Health condition(s) or problem(s) studied:
Resistance training in adolescent athletes 285997 0
Impact of maturation on response to resistance training 285998 0
Condition category
Condition code
Musculoskeletal 286184 286184 0 0
Normal musculoskeletal and cartilage development and function

Intervention/exposure
Study type
Interventional
Description of intervention(s) / exposure
A 12-week experimental study of 1 hour twice-weekly resistance training sessions with a wait-list control group will be conducted with adolescent rugby union players. The project will compare the effect of linear periodised resistance training program to that of a undulating periodised resistance training program. Recruited participants will be randomly assigned to one of two treatment groups. A comparison group will be used as an intervention control. All participants will undergo physical and performance assessments.

Further resistance training details:
a) sessions will be 1 hour duration
b) Each resistance training session will include: 1 core strength lower body exercise, 1 core strength upper body exercise, 2 assistant strength upper body exercises, 2 assistant strength lower body exercises, 3 abdominal exercises and 1 plyometric/jumping exercise. All using free weights and/or own bodyweight.
c) Please see (e) for the intensity and volume of the core strength exercises. The assistant strength lower and upper body exercises will be performed for 4 sets of 6-10 repetitions. The percentage of 1RM intensity for the assistant strength exercises is not predetermined. The abdominal exercises are performed for 4 sets of 8-12 repetitions. The plyometric exercise is performed for 2-5 sets of 2-4 repetitions.
d) Sessions are administered in small group sessions of 6-14 athletes by a qualified strength & conditioning coach with extensive experience working with adolescent athletes.
e) The linear and undulating programs only differ in the progression of load (intensity & volume) in the core strength exercises (Squat and Bench Press). Please see below:

Linear - Undulating
Week 1
Session A 4x10reps@75%1RM - 4x10reps@75%1RM
Session B 4x10reps@75%1RM - 5x5reps@86%1RM

Week 2
Session A 4x8reps@78%1RM - 4x8reps@78%1RM
Session B 4x10reps@75%1RM - 5x5reps@86%1RM

Week 3
Session A 5x6reps@83%1RM - 5x6reps@83%1RM
Session B 4x8reps@78%1RM - 6x4reps@88%1RM

Week 4
Session A 5x5reps@86%1RM - 5x5reps@86%1RM
Session B 4x8reps@78%1RM - 6x4reps@88%1RM

Week 5
Session A 6x4reps@88%1RM - 6x4reps@88%1RM
Session B 5x6reps@83%1RM - 6x3reps@90%1RM

Week 6
Session A 6x3reps@90%1RM - 6x3reps@90%1RM
Session B 5x6reps@83%1RM - 6x3reps@90%1RM

At the 6-week assessment estimated 1RM will be reevaluated. The first 6 week progression of load in the core strength exercises will be replicated in the last 6 weeks using the new estimated 1RM.
Intervention code [1] 284412 0
Other interventions
Comparator / control treatment
The comparison group will perform no resistance training for the initial 12 weeks. They will complete pre and post physical and performance testing. At the completion of the initial 12 weeks the comparison group will undertake 12 weeks of a 1 hour twice
weekly resistance training program.

The resistance training program that the comparison group will undertake is dependent upon the outcome of the intervention. The most effective resistance training program will be implemented in the comparison group.
Control group
Active

Outcomes
Primary outcome [1] 286656 0
maximal lower body strength as assessed by a 5 repetition-maximum squat test
Timepoint [1] 286656 0
Baseline, 6-weeks and 12-weeks in intervention groups. Baseline, 12-weeks and 24-weeks in comparison group.
Secondary outcome [1] 296389 0
muscular power and jumping performance assessed by an incrementally loaded squat jump test
Timepoint [1] 296389 0
Baseline, 6-weeks and 12-weeks in intervention groups. Baseline, 12-weeks and 24-weeks in comparison group.

Eligibility
Key inclusion criteria
Adolescent rugby union players aged 14-18 years of age who are members of the Hunter Academy of Sport/Junior Gold program will be eligible to participate in the intervention arm of this study.

Adolescent rugby union players aged 14-18 years of age who are members of the Hunter Wildfires representative teams will be eligible to participate in the comparison arm of this study.
Minimum age
14 Years
Maximum age
18 Years
Gender
Males
Can healthy volunteers participate?
Yes
Key exclusion criteria
Players will be ineligible if they currently have a medical condition or physical injury preventing testing or training.

Adolescent rugby union players who are not members of the Hunter Academy of Sport/Junior Gold program or Hunter Wildfires representative teams will not be eligible.

Study design
Purpose of the study
Educational / counselling / training
Allocation to intervention
Randomised controlled trial
Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
Participants consented to be involved in the study, after initial baseline assessments the intervention participants were stratified by age and 5 repetition maximum squat performance. Participants were then randomised to one of two treatment groups using an online random number generator.

Participants were not randomised in the comparison group.
Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Simple randomisation of participants to one of two treatment groups using an online random number generator.
Masking / blinding
Blinded (masking used)
Who is / are masked / blinded?



Intervention assignment
Parallel
Other design features
Phase
Not Applicable
Type of endpoint(s)
Efficacy
Statistical methods / analysis

Recruitment
Recruitment status
Active, not recruiting
Date of first participant enrolment
Anticipated
Actual
Date of last participant enrolment
Anticipated
Actual
Date of last data collection
Anticipated
Actual
Sample size
Target
Accrual to date
Final
Recruitment in Australia
Recruitment state(s)

Funding & Sponsors
Funding source category [1] 284842 0
University
Name [1] 284842 0
Funded by University of Newcastle student research higher degree funds
Address [1] 284842 0
School of Biomedical Sciences & Pharmacy
University of Newcastle
University Drive
Callaghan NSW 2308
Country [1] 284842 0
Australia
Primary sponsor type
Individual
Name
Simon Harries
Address
The University of Newcastle
School of Biomedical Sciences and Pharmacy
Level 3, ATC Building
Callaghan Campus
CALLAGHAN NSW 2308
Country
Australia
Secondary sponsor category [1] 283720 0
None
Name [1] 283720 0
Address [1] 283720 0
Country [1] 283720 0

Ethics approval
Ethics application status
Approved
Ethics committee name [1] 286833 0
University of Newcastle Human research ethics committee
Ethics committee address [1] 286833 0
Ethics committee country [1] 286833 0
Australia
Date submitted for ethics approval [1] 286833 0
Approval date [1] 286833 0
01/03/2011
Ethics approval number [1] 286833 0
H-2011-0369

Summary
Brief summary
This project will investigate the effectiveness of two different types of resistance training programs and the influence of stage of maturation on responsiveness in adolescent (14-18 year old) male rugby union players. There is no debate about that resistance training is a safe approach to health and fitness in adolescents, but there is debate about the particular pattern of resistance training that is used. Therefore this project will compare the effects of two different training patterns that are similar in training load to determine whether training pattern influences outcomes in this age group.

As a result of participating in either of the two RT programs the participants will experience improvements in their strength, power, speed, and body composition assessment. It is hypothesized that there will be no difference in the magnitude of change between the two different RT programs.
Trial website
Trial related presentations / publications
Public notes

Contacts
Principal investigator
Name 33876 0
Address 33876 0
Country 33876 0
Phone 33876 0
Fax 33876 0
Email 33876 0
Contact person for public queries
Name 17123 0
Simon Harries
Address 17123 0
University of Newcastle
School of Biomedical Science & Pharmacy
Level 3, ATC Building
Callaghan Campus
CALLAGHAN NSW 2308
Country 17123 0
Australia
Phone 17123 0
+61 421 978 664
Fax 17123 0
Email 17123 0
Simon.Harries@uon.edu.au
Contact person for scientific queries
Name 8051 0
Simon Harries
Address 8051 0
University of Newcastle
School of Biomedical Science & Pharmacy
Level 3, ATC Building
Callaghan Campus
CALLAGHAN NSW 2308
Country 8051 0
Australia
Phone 8051 0
+61 421 978 664
Fax 8051 0
Email 8051 0
Simon.Harries@uon.edu.au

No information has been provided regarding IPD availability
Summary results
Have study results been published in a peer-reviewed journal?
Other publications
Have study results been made publicly available in another format?
Results – basic reporting
Results – plain English summary