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Potato Ingestion and Time-trial Performance

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ClinicalTrials.gov Identifier: NCT03294642
Recruitment Status : Recruiting
First Posted : September 27, 2017
Last Update Posted : May 3, 2018
Sponsor:
Collaborator:
Alliance for Potato Research and Education
Information provided by (Responsible Party):
University of Illinois at Urbana-Champaign

Brief Summary:
This research study evaluates the feasibility and appropriateness of potatoes as an ergogenic aid in comparison to the currently promoted sports gels during a cycling challenge and time trial. Using a crossover design, trained cyclists will complete three separate cycling challenges and subsequent time trials in which they will consume either potatoes, commercially available sports gels, or water only.

Condition or disease Intervention/treatment Phase
Exercise Performance Dietary Supplement: Potatoes Dietary Supplement: Carbohydrate Gel Dietary Supplement: Water Not Applicable

Detailed Description:

The metabolic demands created by endurance activities, which include muscle and liver glycogen depletion as well as losses in body fluids and electrolytes, are significant limitations to the performance potential of the athlete. For this reason, a well-supported recommendation exists for such athletes to consume a carbohydrate formula, in particular, one containing electrolytes during their activity.

Currently, most commercially available exercise-nutrition products for use in endurance activities come at relatively high costs to the athlete. Moreover, the ingredients used within this market vary and could therefore hinder their effectiveness. For example, Fermentable Oligosaccharides Disaccharides Monosaccharides and Polyols (FODMAPs) potentially present in common sports foods (i.e. excess fructose) are known to alter gastrointestinal (GI) function in some individuals. Indeed, 25-70% of endurance athletes experience GI symptoms during exercise. Given the prevalence of exercise induced GI discomfort in this population, it is possible that GI symptoms limit the adherence to nutritional recommendations during exercise. Therefore identification of a targeted nutrition strategy that maximizes GI effectiveness and dietary adherence is warranted.

An alternative to the commercially available sports foods are whole foods. Specifically, white potatoes, which have a high GI index, indicates that their carbohydrate content is readily available. Additionally, potatoes naturally contain potassium, an important electrolyte. Because of these characteristics, potatoes provide the potential to be a low-cost alternative, and merit investigation. To this point, we know of no studies that have explored the effectiveness of white potatoes as an ergogenic aid. Therefore, the purpose of this study is to examine how capable potatoes are at off-setting the losses in muscle and liver glycogen and electrolytes compared to the current products available on the market, i.e. "sports gels."


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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 18 participants
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: None (Open Label)
Primary Purpose: Other
Official Title: Ingestion of Potatoes as a Nutritional Strategy to Improve Cycling Time-trial Performance in Endurance Trained Cyclists
Actual Study Start Date : October 30, 2017
Estimated Primary Completion Date : October 2019
Estimated Study Completion Date : October 2020

Arm Intervention/treatment
Experimental: Trial 1
Water Intervention: In one of the 3 cycling trials, participants will receive only water and no carbohydrate supplementation during the 2 hour cycling challenge.
Dietary Supplement: Water
Water will be used as a control during one of the three cycling challenges (participants will not receive any carbohydrate supplementation).
Other Name: Control

Experimental: Trial 2
Carbohydrate Gel Intervention: In one of the 3 cycling trials, participants will receive carbohydrate supplementation in the form of commercially available gels (15g every 15 minutes) during the 2 hour cycling challenge.
Dietary Supplement: Carbohydrate Gel
Commercially available PowerBar PowerGel will be used for the carbohydrate gel condition during one of the three cycling challenges.

Experimental: Trial 3
Potatoes Intervention: In one of the 3 cycling trials, participants will receive carbohydrate supplementation in the form of pureed russet potato (15g every 15 minutes) during the 2 hour cycling challenge.
Dietary Supplement: Potatoes
Pureed russet potatoes will be used as a carbohydrate supplement for participants during one of the three cycling challenges.




Primary Outcome Measures :
  1. Time trial performance measured in minutes [ Time Frame: 1 year ]
    Comparison of time trial performance times between potatoes and sports gel conditions to determine effectiveness of potatoes as an ergogenic aid.



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Ages Eligible for Study:   20 Years to 40 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • Male or female
  • ≥150 km/wk of cycling mileage
  • ≥6 months of prior training history
  • VO2peak values ≥45 ml/kg/min for females and ≥50 ml/kg/min for males
  • Aged between 20-40 years

Exclusion Criteria:

  • Chronic Smoking or tobacco use
  • Active cardiovascular disease
  • Diabetes Mellitus or other metabolic disorders
  • Liver kidney, or urinary disease
  • Musculoskeletal/Orthopedic disorders (e.g., osteoarthritis, rheumatoid arthritis, tendinitis, gout, fibromyalgia, patellar tendinopathy, or chronic low back pain)
  • Neuromuscular disorders
  • hypertension
  • Diagnosed GI tract diseases
  • Heart Disease
  • Bleeding or clotting disorders
  • Neurological disease
  • Epilepsy
  • Respiratory disease
  • Pregnancy
  • Contraindications for exercise
  • <150 km/wk of cycling mileage
  • <6 months of prior training history
  • VO2peak values <45 ml/kg/min for females and <50 ml/kg/min for males

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03294642


Locations
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United States, Illinois
Freer Hall Recruiting
Urbana, Illinois, United States, 61801
Contact: Nicholas A Burd, Ph.D.    217-244-0970    naburd@illinois.edu   
Sponsors and Collaborators
University of Illinois at Urbana-Champaign
Alliance for Potato Research and Education
Investigators
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Principal Investigator: Nicholas A Burd, Ph.D University of Illinois at Urbana-Champaign, Department of Kinesiology

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Responsible Party: University of Illinois at Urbana-Champaign
ClinicalTrials.gov Identifier: NCT03294642     History of Changes
Other Study ID Numbers: 18104
First Posted: September 27, 2017    Key Record Dates
Last Update Posted: May 3, 2018
Last Verified: September 2017
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

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Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by University of Illinois at Urbana-Champaign:
exercise
FODMAP
gastrointestinal
endurance
cycling