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Completed

NCT Number: NCT06449300

Effects of Different Volumes of Resistance Training

This study explores the effects of varying volumes of resistance training on body composition, strength, peak power, and muscle thickness in untrained women over eight weeks. A randomized controlled trial involving 45 female college students assessed the outcomes across three groups: low-volume training (LVT) with three weekly sessions, moderate-volume training (MVT) with four weekly sessions, and high-volume training (HVT) with five weekly sessions. Participants were untrained, aged 18-65, and free from cardiovascular diseases or performance-enhancing drugs.

The hypothesis suggested that moderate volume training would yield optimal muscle development, considering the potential non-linear dose-response relationship where excessive training might be detrimental. Measurements included body composition, muscle thickness, and peak power through a force platform during vertical jumps.

Data analysis focused on changes in muscle thickness, strength, and body composition, with statistical significance set at p < 0.05. The study aimed to provide insights into how different training volumes affect physiological adaptations in untrained women, potentially guiding fitness regimen optimizations for similar populations.

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Key information

Conditions

Healthy

Age range

18 year–65 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Princess Nourah bint Abdulrahman University

Riyadh, 11671, Saudi Arabia

About this study

The study aimed to investigate the effect of different resistance training volume (low-, moderate, and high) on body composition, maximal strength, peak power, and muscle thickness in untrained women over eight weeks. The study is a three-arm, randomized controlled trial, 45 female college students participated, fit the specific inclusion criteria like age between 18-65 and being untrained. Exclusion criteria included the use of performance-enhancing drugs or recent resistance training.

Participants were randomly assigned to one of three groups: low-volume training (LVT) with three sessions weekly, moderate-volume training (MVT) with four sessions weekly, and high-volume training (HVT) with five sessions weekly. Each session comprised 12 exercises. Split split-strength training method was applied. After participants' 1RM maximums were determined, training loads were calculated separately for each participant. All workouts were conducted by certified trainers to ensure they were performed in the correct training format. Each training session lasted approximately 60 minutes. The weekly training loads of all participants were increased by 5%. In the LVT group, 3 sets of 8-12 repetitions of: between sets interval: 120 seconds (3 days/wk), in the MVT group, 3 sets of 8-12 repetitions of: between sets interval: 120 seconds (4 days/wk), in the HVT group, 3 sets of 8-12 repetitions of: between sets interval: 120 seconds exercises (5 days/wk) were performed.

Results and data analysis involved anthropometric measurements, muscle thickness via ultrasound, and peak power from the vertical jump test. Statistical significance was set at p < 0.05, and effect sizes were calculated with Partial Eta Squared values.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Adult women between ages of 18 -65 years old
  • Able to walk independently
  • Free of any history of cardiovascular disease
  • Untrained (less than 150 min of PA/week)

Exclusion criteria

  • Intake of performance-enhancing drugs, anabolic steroids
  • Any history of injury, or physiological or physical limitations that could affect the ability to perform training and physical testing in the last year.
  • Those who had been RT for more than 2 months in the previous 6 months were excluded.

Treatment and study plan

Resistance exercise-LVT

Other

(low volume training - 3 sessions of 12 exercises per week)

Resistance exercise-MVT

Other

(moderate volume training - 4 sessions of 12 exercises per week)

Resistance exercise-HVT

Other

(high volume training - 5 sessions of 12 exercises per week)

Primary outcomes

  1. Body height measurements

    Time frame: at baseline and end of 8 week

    A stadiometer is attached to the wall. It has a sliding horizontal headpiece that's adjusted to rest on top of your head. The measurement of height will be conducted using a Mesilife portable stadiometer.

  2. Anthropometric measurements

    Time frame: at baseline and end of 8 week

    Bio-impedance body composition analysis system

  3. Muscle thickness measurements

    Time frame: at baseline and end of 8 week

    A portable ultrasound scanner will be used to determine muscle thickness. At one location, muscle thickness will be measured: Between the greater trochanter and the lateral epicondyle of the thigh, the thickness of the quadriceps femoris (Vastus lateralis) will be measured at 50%. Ultrasound tests will be done at the start of the study and 8 weeks later, by a researcher blinded to the interventions. All tests were performed in the morning when participants are fasting.

  4. Countermovement Jump (CMJ)

    Time frame: at baseline and end of 8 week

    Countermovement Jump (CMJ) values of all participants will be measured. Peak muscle power measures in watts (W) using the Accupeak power2.0 portable force platform system . The measurement frequency of the device was set to 500 Hz. Participants will undrergo a 10-minute warm-up program before completing a CMJ. Participants will be asked to begin a downward movement and jump as high as possible after hearing a tone from the computer.

Sponsors and collaborators

Lead sponsor

Princess Nourah Bint Abdulrahman University

Other

Collaborators

  • Kırıkkale University

Registry information

Official study title

Effects of Different Volumes of Resistance Training on Body Composition, Peak Power, and Muscle Thickness in Untrained Healthy Women

Important dates

Study start
2021
Primary completion
2023
Study completion
2024
First posted
Jun 10, 2024
Registry last updated
Jun 14, 2024

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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