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Trial registered on ANZCTR

Registration number
Ethics application status
Date submitted
Date registered
Date last updated
Type of registration
Retrospectively registered

Titles & IDs
Public title
Power training in older adults
Scientific title
Optimal load for increasing muscle power during explosive resistance training in older adults
Universal Trial Number (UTN)
Trial acronym
Linked study record

Health condition
Health condition(s) or problem(s) studied:
Muscle power 178 0
Condition category
Condition code
Musculoskeletal 201 201 0 0
Normal musculoskeletal and cartilage development and function

Study type
Description of intervention(s) / exposure
Participants were randomised to explosive resistance training at 20%, 50%, or 80% of maximum dynamic muscle strength (1RM) or a non-training control group for 8-12 weeks. Participants randomised to training groups, exercised twice a week performing 3 sets of 8 rapid concentric/slow eccentric repetitions for 5 exercises (leg press, chest press, leg extension, seated row, leg flexion) using Keiser pneumatic resistance training machines. Control group participants maintained their usual physical activity levels.
Intervention code [1] 125 0
Other interventions
Comparator / control treatment
Non-training control group for 8-12 weeks.
Control group
Dose comparison

Primary outcome [1] 241 0
Peak Muscle Power
Timepoint [1] 241 0
At baseline and 8 or 12 weeks.
Secondary outcome [1] 544 0
Maximal dynamic muscle strength
Timepoint [1] 544 0
At baseline and 8 or 12 weeks.
Secondary outcome [2] 545 0
Local muscular endurance
Timepoint [2] 545 0
At baseline and 8 or 12 weeks.
Secondary outcome [3] 546 0
Balance (posturography)
Timepoint [3] 546 0
At baseline and 8 or 12 weeks.
Secondary outcome [4] 547 0
Fat free mass
Timepoint [4] 547 0
At baseline and 8 or 12 weeks.
Secondary outcome [5] 548 0
Blood pressure during maximal dynamic strength testing
Timepoint [5] 548 0
At baseline

Key inclusion criteria
Aged 60 years or older, living independently, willing to be randomised to experimental or control groups, and be able to attend scheduled testing and training sessions.
Minimum age
60 Years
Maximum age
Not stated
Both males and females
Can healthy volunteers participate?
Key exclusion criteria
Regular participation in strength/power training/sports (>/= 1 day per week) during the past 6 months, acute or terminal illness, acute myocardial infarction in the past 6 months, unstable cardiovascular disease, uncontrolled diabetes or other metabolic disease, disorders of the nervous system disrupting voluntary movement, severe functional limitation or balance disorders (unable to walk unaided), upper or lower extremity fracture within the past 3 months, arm or leg amputation, currently symptomatic hernia/haemorrhoids, musculoskeletal disease/injury severely restricting voluntary movement, cognitive impairment.

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)
Group allocation was concelled in opaque envelopes by an individual not involved with study participants
Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Permuted block randomization stratified by gender was generated using a computerized randomization program
Masking / blinding
Blinded (masking used)
Who is / are masked / blinded?

Intervention assignment
Other design features
Type of endpoint(s)
Statistical methods / analysis

Recruitment status
Date of first participant enrolment
Date of last participant enrolment
Date of last data collection
Sample size
Accrual to date
Recruitment in Australia
Recruitment state(s)

Funding & Sponsors
Funding source category [1] 256 0
Name [1] 256 0
The University of Sydney
Address [1] 256 0
Country [1] 256 0
Primary sponsor type
The University of Sydney
Secondary sponsor category [1] 195 0
Name [1] 195 0
Address [1] 195 0
Country [1] 195 0

Ethics approval
Ethics application status
Ethics committee name [1] 1083 0
The University of Sydney - Human Research Ethics Committee.
Ethics committee address [1] 1083 0
Ethics committee country [1] 1083 0
Date submitted for ethics approval [1] 1083 0
Approval date [1] 1083 0
Ethics approval number [1] 1083 0
Ethics committee name [2] 1084 0
Balmain Hospital - CSAHS Ethics Review Committee
Ethics committee address [2] 1084 0
Ethics committee country [2] 1084 0
Date submitted for ethics approval [2] 1084 0
Approval date [2] 1084 0
Ethics approval number [2] 1084 0

Brief summary
To investigate the optimal training intensity for the improvement of muscle power during high velocity resistance training in older men and women
Trial website
Trial related presentations / publications
Public notes

Principal investigator
Name 35563 0
Address 35563 0
Country 35563 0
Phone 35563 0
Fax 35563 0
Email 35563 0
Contact person for public queries
Name 9314 0
Nathan de Vos
Address 9314 0
School of Exercise and Sport Science
Faculty of Health Sciences
University of Sydney
Cumberland Campus
East Street
Lidcombe NSW 2141
Country 9314 0
Phone 9314 0
Fax 9314 0
Email 9314 0
Contact person for scientific queries
Name 242 0
Nathan de Vos
Address 242 0
School of Exercise and Sport Science
Faculty of Health Sciences
University of Sydney
Cumberland Campus
East Street
Lidcombe NSW 2141
Country 242 0
Phone 242 0
Fax 242 0
Email 242 0

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