Power Training Versus Strength Training in the Elderly

August 1, 2016 updated by: João Pedro Pinho, University of Sao Paulo

Biomechanical Gait Indicators of Elderly Women in Response to Strength Training or Power Training

The inexorable decline in motor skills during aging provides the investigators with an elderly population with various functional limitations. Among these, the ability to walk, being associated with the risk of falling has been studied by several authors. The adoption of strength and power training as an intervention strategy to reduce the negative effects arising from the physiological or pathological process of aging has been widely discussed in these studies. However, the effects of these interventions on biomechanical gait indicators have not been fully debated yet. Therefore, this study aimed to compare the effects of these two training protocols on functional capacities and biomechanical gait parameters of elderly women.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Three female groups, homogenized by age, body mass index and physical activity level, were formed: the control group (GC: n=8, 69±4 years old), the strength training group (GF: n=6, 67±4 years old) and the power training group (GP, n=7, 68±4 years old). No extra activity was induced to GC's routine. Meanwhile, GF and GP underwent 12 weeks of strength and power training, respectively, with three weekly sessions. While GF performed the exercises with moderate speed (70-90% of 1RM), the GP executed them in fast speed (40-60% of 1RM). A kinematic and electromyographic gait evaluation, as well as balance and functional capacity evaluations, were conducted prior and after the intervention period.

Study Type

Interventional

Enrollment (Actual)

30

Phase

  • Not Applicable

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

65 years to 75 years (Older Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

Female

Description

Inclusion Criteria:

  • sedentary women with no physical mobility limitations

Exclusion Criteria:

  • attending less than 75% of the intervention sessions and not attending the final evaluation

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Prevention
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Single

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Power Training Group
Physical exercises. Strength training performed quickly
Other: Power Training
This experimental groups underwent an intervention period of power training
Experimental: Strength Training Group
Physical exercises. Strength training performed in moderate speed
Other: Strength Training
This experimental groups underwent an intervention period of strength training
No Intervention: Control Group
This group maintained the same physical activity level during the intervention period.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Gait kinematics
Time Frame: through study completion, an average of 6 months
toe clearance: minimum vertical distance of the forefoot and the ground during swing phase
through study completion, an average of 6 months
Timed up and go test
Time Frame: through study completion, an average of 6 months
time needed to get up from a seated position walk 3 meters and walk back to the chair
through study completion, an average of 6 months
Muscle power
Time Frame: through study completion, an average of 6 months
knee extensors muscle power
through study completion, an average of 6 months
electromyography gait analysis
Time Frame: through study completion, an average of 6 months
Knee extensors and flexors muscles co-contraction during the gait cycle
through study completion, an average of 6 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

University of Sao Paulo

Investigators

  • Study Director: Alberto C Amadio, PhD, University of Sao Paulo

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

June 1, 2011

Primary Completion (Actual)

December 1, 2011

Study Completion (Actual)

January 1, 2012

Study Registration Dates

First Submitted

July 27, 2016

First Submitted That Met QC Criteria

August 1, 2016

First Posted (Estimate)

August 2, 2016

Study Record Updates

Last Update Posted (Estimate)

August 2, 2016

Last Update Submitted That Met QC Criteria

August 1, 2016

Last Verified

July 1, 2016

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • PowerElderly

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

IPD Plan Description

Only group data will be available. These are to be published in scientific papers.

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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