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Completed

NCT Number: NCT04320784

Effects of a Time Restricted Eating Protocol on Cyclists (TRECYC)

We sought to investigate the effects of 4 weeks of 16/8 time restricted eating (TRE) with windows of 16 hours of fasting and 8 hours of eating) on elite cyclists' performance, metabolic and blood parameters.

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Key information

Conditions

Fasting and Performance Behavior Fasting Feeding Behavior Intermittent Fasting

Age range

18 year–24 year

Sex eligibility

Male

Study type

Interventional

Phase

Not applicable

Primary location

Nutrition and Exercise Lab, DSB, University of Padova

Padova, 35131, Italy

About this study

Sixteen elite under-23 cyclists were randomly assigned to a TRE group or to a control group (CTRL) with a traditional meal pattern. The TRE group consumed 100% of its estimated daily energy needs in an 8-hour time window: from 10:00 AM (ante meridiem) to 6:00 PM (post meridiem) whilst the CTRL group consumed 100% of its estimated daily energy needs in 3 meals between 7:00 AM and 9:00 PM. During the experimental period, training loads were similar in the two groups. Athletes were tested before and after 4 weeks of the intervention. Body composition , basal metabolism, performances indexes and blood parameters were measured.

Who can participate

Healthy volunteers accepted: Yes

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

Inclusion criteria

  • elite under 23 cyclists male

Exclusion criteria

  • adherence to special diets
  • use of nutritional supplements (except a daily multivitamin-mineral and/or protein supplement)
  • use of medications

Treatment and study plan

Time restricted eating

Other

TRE group consumed 100% of its estimated daily energy needs in an 8-hour time window: from 10:00 AM to 6:00 PM

Other names: TRE

Control

Other

CTRL group consumed 100% of its estimated daily energy needs in 3 meals between 7:00 AM and 9:00 PM

Other names: CTRL

Primary outcomes

  1. VO2max

    Time frame: 4 weeks

    Maximal oxygen consumption (in ml O2/Kg/min) measured during a cycloergometer incremental test through a gas analyses

  2. fat mass

    Time frame: 4 weeks

    fat mass measured through body impedence analyser

  3. lean body mass

    Time frame: 4 weeks

    lean body mass mass measured through body impedence analyser

Secondary outcomes

  1. white blood cells

    Time frame: 4 weeks

    white blood cells as thousands per microliter

  2. Eosinophils

    Time frame: 4 weeks

    Eosinophils as percentage of total white blood cells

  3. Monocytes

    Time frame: 4 weeks

    Monocytes as percentage of total white blood cells

  4. Basophiles

    Time frame: 4 weeks

    Basophiles s percentage of total white blood cells

  5. Hematocrit

    Time frame: 4 weeks

    Hematocrit as percentage

  6. Haemoglobin

    Time frame: 4 weeks

    Haemoglobin as gram per Liter

  7. Mean cell volume

    Time frame: 4 weeks

    mean cell volume as femtonLiter

  8. mean cell haemoglobin

    Time frame: 4 weeks

    mean cell haemoglobin as picograms

  9. ESR (Erythrocyte sedimentation rate )

    Time frame: 4 weeks

    ESR as millimeters per hour

  10. CRP (C-reactive protein)

    Time frame: 4 weeks

    CRP as milligram per deciliter

  11. Total cholesterol

    Time frame: 4 weeks

    Total cholesterol as milligram per deciliter

  12. TG (triglycerides)

    Time frame: 4 weeks

    TG as milligram per deciliter

  13. glucose

    Time frame: 4 weeks

    glucose as milligram per deciliter

  14. creatinine

    Time frame: 4 weeks

    creatinine as milligram per deciliter

  15. creatin kinase

    Time frame: 4 weeks

    creatin kinase as milligram per deciliter

  16. iron

    Time frame: 4 weeks

    iron as microgram per deciliter

  17. ferritin

    Time frame: 4 weeks

    ferritin as microgram per liter

  18. transferrin

    Time frame: 4 weeks

    ferritin as milligram per deciliter

  19. TSH (Thyroid Stimulating Hormone)

    Time frame: 4 weeks

    TSH as micro international unit per milliliter

  20. T3 (triiodothyronine) free

    Time frame: 4 weeks

    T3 free as picogram per milliliter

  21. Testosterone free

    Time frame: 4 weeks

    Testosterone free as picogram per milliliter

  22. IL-6

    Time frame: 4 weeks

    IL-6 as picogram per milliliter

  23. TNFalfa

    Time frame: 4 weeks

    TNFalfa as picogram per milliliter

  24. IGF-1

    Time frame: 4 weeks

    IGF-1 as nanogram per milliliter

  25. Insulin

    Time frame: 4 weeks

    Insulin micro international unit per milliliter

Sponsors and collaborators

Lead sponsor

University of Padova

Other

Collaborators

  • University of Palermo
  • University of Pavia

Registry information

Official study title

Effects of 4 Weeks of Time Restricted Eating Protocol on Performance, Metabolism and Blood Outcomes in Elite Cyclists

Acronym: TRECYC

Important dates

Study start
2018
Primary completion
2018
Study completion
2018
First posted
Mar 25, 2020
Registry last updated
Mar 25, 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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