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NCT Number: NCT04404413

High-Intensity Interval Training and Intermittent Fasting on Body Composition and Physical Performance in Active Women

The objective of this study is to compare the body composition and physical performance effects of HIIT, with or without intermittent fasting intervention in active women. Fourteen active normal weight women aged 18-35 participated in the study. The effects of 2x8 weeks without (HIIT) or with (HIIT+IF) intermittent fasting caloric restriction (20% reduction in weekly energy intake) on body composition and performance (Hand-grip strength, Counter movement jump, Wingate Anaerobic 30 s Cycling Test), were compared. There were two weeks in between both phases when they did not perform the scheduled activity, so as not to alter the experimental phase.

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Key information

Conditions

Body Composition Behavior Fasting Feeding Behavior Intermittent Fasting Physical Performance

Age range

18 year–35 year

Sex eligibility

Female

Study type

Interventional

Phase

Not applicable

Primary location

Alejandro Martínez Rodriguez

San Vicent del Raspeig, Alicante, 03690, Spain

Who can participate

Healthy volunteers accepted: Yes

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

Inclusion criteria

  • No muscular, ligamentous, bone, nerve or joint pathology incompatible with the training program.
  • Not to present cardiovascular or cardiorespiratory problems.
  • Physically active in the last 5 years, according to the American College of Sports Medicine (ACSM) definition.

Exclusion criteria

  • Following pharmacological treatment or supplement.
  • Performing other sports activities that may influence the study results during their participation in the study.
  • Not following training or diet program guidelines or attending scheduled training sessions.

Treatment and study plan

Intensity interval training (HIIT)

Behavioral

2x8 weeks of high-intensity interval training (HIIT)

Intensity interval training (HIIT) + intermittent fasting

Behavioral

2x8 high-intensity interval training with (HIIT+IF) intermittent fasting caloric restriction (20% reduction in weekly energy intake).

Primary outcomes

  1. Hand-grip strength

    Time frame: 16 weeks

    Hand-grip strength test was performed as an indicator of overall strength.

  2. Counter movement jump (CMJ)

    Time frame: 16 weeks

    In the CMJ test, the participants performed a maximum vertical jump starting from a standing position with arm swing not allowed.

  3. Wingate Anaerobic 30 s Cycling Test

    Time frame: 16 weeks

    Wingate Anaerobic 30 s Cycling Test with a validated cycloergometer (Monark 894E, Vansbro, Sweden).

  4. Fat mass

    Time frame: 16 weeks

    Body composition masses were estimated using validated equations. Carter's equation was used to estimate fat mass.

  5. Muscle mass

    Time frame: 16 weeks

    Body composition masses were estimated using validated equations. Lee's equation to estimate muscle mass.

  6. Residual mass

    Time frame: 16 weeks

    Body composition masses were estimated using validated equations. Residual mass was obtained from the difference between fat mass and muscle mass.

  7. Body Mass

    Time frame: 16 weeks

    It was performed using a digital scale with 0,1kg accuracy (Tanita BC-545, Tokyo, Japan).

Sponsors and collaborators

Lead sponsor

University of Alicante

Other

Collaborators

  • Universidad Católica San Antonio de Murcia

Registry information

Official study title

Effect of High-Intensity Interval Training and Intermittent Fasting on Body Composition and Physical Performance in Active Women

Important dates

Study start
2019
Primary completion
2019
Study completion
2020
First posted
May 27, 2020
Registry last updated
May 27, 2020

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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