Effects of Different Power Training Intensities in Older Adults

Federal University of Rio Grande do Sul

Status: Invitation-only

Conditions: Investigating the Effects of Power Training in the Elderly

Treatments: Device: low to moderate intensity (PTLM; 40-60% of 1-repetition maximum [1RM]); Device: Moderate to high intensity (PTMH; 65-80% of 1-repetition maximum [1RM]) )

Study type: Interventional

Funder types: Other

Identifiers

NCT07023146

85503024.6.0000.5347

Details and patient eligibility

About

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.

Enrollment: 70 estimated patients

Sex: All

Ages: 60+ years old

Volunteers: Accepts Healthy Volunteers

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)

Trial design

Primary purpose: Prevention

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Triple Blind

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70 participants in 2 patient groups

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

Active Comparator group

Description:

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

Treatment:

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

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

Active Comparator group

Description:

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

Treatment:

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