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

Not Applicable

Completed

• Conditions: Exercise Performance
• Interventions: Dietary Supplement: citrus extract; Other: placebo

• Registration Number: NCT03044444
• Lead Sponsor: BioActor

Brief Summary

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.

Detailed Description

Not available

Study Timeline

• Study First Submitted: 2017-01-30
• Study First Submitted QC: 2017-02-02
• Study First Posted: 2017-02-07
• Study Start: 2017-04-13
• Primary Completion: 2018-04-06
• Study Completion: 2018-04-06
• Status Verified: 2020-07
• Last Update Submitted: 2020-07-08
• Last Update Posted: 2020-07-10

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 93

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.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
high dose citrus extract	citrus extract	this group will receive a high dose (500mg/day) of the citrus extract for 8 weeks
placebo	placebo	this group will receive a placebo (500mg maltodextrin per day) for 8 weeks
low dose citrus extract	citrus extract	this group will receive a low dose (400mg/day) of the citrus extract for 8 weeks

Primary Outcome Measures

Name	Time	Method
peak force output Wingate	8 weeks	Peak force output in Watts during a high intensity repeated sprint cycling exercise

Secondary Outcome Measures

Name	Time	Method
jumping height	8 weeks	jumping height in cm measured during a vertical jump exercise
anaerobic capacity	8 weeks	total amount of power (W) generated in the first 30 seconds of the the triple Wingate cycle test
force output Jump	8 weeks	force output in W measured during a vertical jump exercise
running time	8 weeks	running time in minutes and seconds measured over 1600m
peak force output Handgrip	8 weeks	Peak force output in Watts during a handgrip strength test

Trial Locations

Locations (1)

High Performance Center; 🇳🇱 Sittard, Limburg, Netherlands