Effects of Different Power Training Intensities in Older Adults

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

ENROLLING_BY_INVITATION

Clinical Phase

NA

Total Enrollment

70 participants

Study Classification

INTERVENTIONAL

Study Start Date

2025-04-02

Study Completion Date

2025-12-11

Brief Summary

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Power (strength × velocity) is a crucial component for maintaining independence during aging. Therefore, investigating interventions aimed at improving this physical capacity is essential for this population. The aim of this study is to examine the effects of power training (PT) performed at low to moderate intensity (PTLM; 40-60% of 1-repetition maximum \[1RM\]) and moderate to high intensity (PTMH; 65-80% of 1RM) on muscle power, kinematic gait parameters, strength, muscle thickness, and functional performance in older adults. Participants will be randomly assigned to perform PTLM and PTMH. Data collection will occur before and after familiarization, as well as at weeks 8 and 16 of the training programs. Participants will undergo a series of tests in the following sequence: 1) muscle thickness and 1RM test; 2) muscle power, maximum voluntary contraction, and rate of force development; 3) functional performance. The primary analyses will be conducted on an intention-to-treat basis, comparing the effects of the interventions and groups over time. Generalized Estimating Equations (GEE) will be used, considering the factors of group (2 levels) and time (3 levels). Paired comparisons will be assessed using the Bonferroni post-hoc test to identify significant differences between groups and time points. All tests will be performed using JASP software (version 0.16.4.0), with statistical significance set at p \< 0.05 for all analyses.

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Detailed Description

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Conditions

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Investigating the Effects of Power Training in the Elderly

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

The methodological procedures of this project will be carried out at the UFRGS facilities, on the campus of the School of Physical Education, Physiotherapy and Dance (ESEFID) and at LAPEX. After two weeks of familiarization, in order to guarantee the reproducibility and reliability of the methodological procedures, the participants will be randomized electronically (randomizer.org.br) to perform low to moderate intensity (PTLM; 40-60% of 1-repetition maximum \[1RM\]) and moderate to high intensity (PTMH; 65-80% of 1RM).

Primary Study Purpose

PREVENTION

Blinding Strategy

TRIPLE

Participants Caregivers Outcome Assessors

Study Groups

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Low to moderate intensity (PTLM; 40-60% of 1-repetition maximum [1RM])

Power training performed at maximum velocity in the concentric phase with lower to moderate intensity

Group Type ACTIVE_COMPARATOR

low to moderate intensity (PTLM; 40-60% of 1-repetition maximum [1RM])

Intervention Type DEVICE

Power training performed at maximum velocity in the concentric phase with lower to moderate intensity

Moderate to high intensity (PTMH; 65-80% % of 1-repetition maximum [1RM])

Power training performed at maximum velocity in the concentric phase with moderate to high intensity

Group Type ACTIVE_COMPARATOR

Moderate to high intensity (PTMH; 65-80% of 1-repetition maximum [1RM]) )

Intervention Type DEVICE

Power training performed at maximum velocity in the concentric phase with moderate to high intensity

Interventions

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Moderate to high intensity (PTMH; 65-80% of 1-repetition maximum [1RM]) )

Power training performed at maximum velocity in the concentric phase with moderate to high intensity

Intervention Type DEVICE

low to moderate intensity (PTLM; 40-60% of 1-repetition maximum [1RM])

Power training performed at maximum velocity in the concentric phase with lower to moderate intensity

Intervention Type DEVICE

Other Intervention Names

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PTMH Linear Encoder Load Cell 1-Repetition Maximum (1RM) Ultrasound PTLM Linear Encoder 1-Repetition Maximum (1RM) Ultrasound Load Cell

Eligibility Criteria

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Inclusion Criteria

* Age 60 years or older
* No participation in regular and systematic resistance training in the last three months
* No absolute or relative contraindications to exercise
* No musculoskeletal injuries that could interfere with training and assessments

Exclusion Criteria

* Use of steroids, nutritional supplements, or ergogenic substances
* Failure to complete all study phases
* Failure to complete more than 80% of the training sessions (32 sessions)

Minimum Eligible Age

60 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes