Isokinetic Testing Protocol in Elderly and Young Men

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00673998
Recruitment Status : Completed
First Posted : May 7, 2008
Last Update Posted : May 7, 2008
Information provided by:
University of Brasilia

April 30, 2008
May 7, 2008
May 7, 2008
February 2005
March 2006   (Final data collection date for primary outcome measure)
Peak Torque [ Time Frame: 1 week ]
Same as current
No Changes Posted
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Isokinetic Testing Protocol in Elderly and Young Men
The Effects of Rest Interval on Quadriceps Torque During an Isokinetic Testing Protocol in Elderly and Young Men
An age-related decrease in muscular strength may have a detrimental effect on muscle fatigue and recovery. To date, only one study has determined the effect of varied rest intervals (RI) between exercise sets in active younger and older women. They reported that active younger and older women require similar RI between sets to recovery full isokinetic knee extension peak torque (PT). However, we are unaware of any published studies comparing RI PT recovery between younger and older men. Thus, the purpose of this study was to compare the effect of two different RI's between sets of isokinetic knee extension exercise on PT, and Total Work (TW) between untrained younger and older men.
18 young men (24.22 ± 2.58 yrs) and 20 older men (66.85 ± 4.02 yrs) performed 3 sets of 10 unilateral isokinetic knee extension repetitions at 60°/s. The rest intervals between sets were 1 and 2 minutes and were counterbalanced across 2 testing days, separated by a minimum of 48 hours. The work-to-rest ratio was 1:3 and 1:6. All subjects were not involved in exercise programs that included resistance exercises within the last 6 months. Statistical evaluation of the data was performed using a 2x 2 x 3 mixed factor repeated measures ANOVA [age (younger and older) x rest interval (1 and 2 min) x set (1st, 2nd, and 3rd)]. Statistical significance was set at p < 0.05 for all comparisons.
Not Applicable
Allocation: Randomized
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Diagnostic
Device: Isokinetic Dynamometer (Biodex system III)
Biodex system III Isokinetic Dynamometer (Biodex Medical, Inc., Shirley, NY).
Other Names:
  • Biodex Isokinetic Dynamometer
  • Cybex Isokinetic Dynamometer
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*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
Same as current
November 2006
March 2006   (Final data collection date for primary outcome measure)

Inclusion Criteria:

  • Less than 75 years
  • Independent

Exclusion Criteria:

  • History of cardiovascular disease
  • Hypertension
  • Orthopedic disease
Sexes Eligible for Study: Male
20 Years to 75 Years   (Adult, Older Adult)
Contact information is only displayed when the study is recruiting subjects
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Martim Bottaro, PhD, University of Brasilia
University of Brasilia
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Principal Investigator: Martim Bottaro, PhD University of Brasilia
University of Brasilia
May 2008

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP