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Completed

NCT Number: NCT03044444

The Effect of a Citrus Extract on Exercise Performance in Moderately Trained Athletes

In this study, the effect of citrus extract on exercise performance will be investigated. The study consists of three groups: one group will receive a high dose citrus extract, one group will receive a low dose citrus extract and the last group will receive a placebo. After four and eight weeks the effects on performance are measured through a Wingate cycling test. It is expected that exercise performance will increase in the citrus extract groups, compared to the placebo group.

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Key information

Conditions

Exercise Performance

Age range

18 year–35 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

High Performance Center

Sittard, Limburg, 6135LG, Netherlands

Who can participate

Healthy volunteers accepted: Yes

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

Inclusion criteria

  • healthy idividuals
  • Participants are amateur or (semi-) professional athletes in resistance or interval sports (engage in >4 hours of intense physical activity per week).

Exclusion criteria

  • Use of creatine supplements and/or anabolic steroids.
  • Allergy to test product/placebo
  • Allergy to citrus fruits
  • BMI lower than 18 or higher than 30
  • Recent muscle injury in less than one month before the start of the study.
  • Cardiovascular complications
  • Use of medication that may interfere with the study results
  • Administration of investigational drugs or participation in any scientific intervention study which may interfere with this study (to be decided by the principle investigator), in the 180 days prior to the study.
  • Abuse of products; alcohol (> 20 alcoholic units per week) and drugs.

Treatment and study plan

citrus extract

Dietary Supplement

Participants will receive either a low or high dose citrus extract

Placebo

Other

participants will receive 500mg of maltodextrin

Primary outcomes

  1. peak force output Wingate

    Time frame: 8 weeks

    Peak force output in Watts during a high intensity repeated sprint cycling exercise

Secondary outcomes

  1. jumping height

    Time frame: 8 weeks

    jumping height in cm measured during a vertical jump exercise

  2. peak force output Handgrip

    Time frame: 8 weeks

    Peak force output in Watts during a handgrip strength test

  3. force output Jump

    Time frame: 8 weeks

    force output in W measured during a vertical jump exercise

  4. anaerobic capacity

    Time frame: 8 weeks

    total amount of power (W) generated in the first 30 seconds of the the triple Wingate cycle test

  5. running time

    Time frame: 8 weeks

    running time in minutes and seconds measured over 1600m

Other outcomes

  1. lactate

    Time frame: 8 weeks

    post-exercise blood lactate in mmol/L after triple Wingate cycle exercise test

Sponsors and collaborators

Lead sponsor

Bioactor

Other

Registry information

Official study title

Establishing the Effect of Long-term Citrus Extract Supplementation on Exercise-specific Performance in Moderately Trained Athletes

Important dates

Study start
2017
Primary completion
2018
Study completion
2018
First posted
Feb 7, 2017
Registry last updated
Jul 10, 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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