Fasting and Performance
Conditions
Keywords
fasting, cyclists, athletes, time restricted eating, performance, body composition.
Brief summary
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.
Detailed description
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.
Interventions
OTHERTime restricted eating
TRE group consumed 100% of its estimated daily energy needs in an 8-hour time window: from 10:00 AM to 6:00 PM
OTHERControl
CTRL group consumed 100% of its estimated daily energy needs in 3 meals between 7:00 AM and 9:00 PM
Sponsors
University of Palermo
University of Pavia
University of Padova
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
BASIC_SCIENCE
Masking
SINGLE (Outcomes Assessor)
Masking description
Outcome assessor treated anonymus data
Intervention model description
It is a single blind, parallel arms study
Eligibility
Sex/Gender
MALE
Age
18 Years to 24 Years
Healthy volunteers
Yes
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
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| VO2max | 4 weeks | Maximal oxygen consumption (in ml O2/Kg/min) measured during a cycloergometer incremental test through a gas analyses |
| fat mass | 4 weeks | fat mass measured through body impedence analyser |
| lean body mass | 4 weeks | lean body mass mass measured through body impedence analyser |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Basophiles | 4 weeks | Basophiles s percentage of total white blood cells |
| Hematocrit | 4 weeks | Hematocrit as percentage |
| Haemoglobin | 4 weeks | Haemoglobin as gram per Liter |
| Mean cell volume | 4 weeks | mean cell volume as femtonLiter |
| mean cell haemoglobin | 4 weeks | mean cell haemoglobin as picograms |
| ESR (Erythrocyte sedimentation rate ) | 4 weeks | ESR as millimeters per hour |
| CRP (C-reactive protein) | 4 weeks | CRP as milligram per deciliter |
| Total cholesterol | 4 weeks | Total cholesterol as milligram per deciliter |
| TG (triglycerides) | 4 weeks | TG as milligram per deciliter |
| glucose | 4 weeks | glucose as milligram per deciliter |
| creatinine | 4 weeks | creatinine as milligram per deciliter |
| white blood cells | 4 weeks | white blood cells as thousands per microliter |
| iron | 4 weeks | iron as microgram per deciliter |
| ferritin | 4 weeks | ferritin as microgram per liter |
| transferrin | 4 weeks | ferritin as milligram per deciliter |
| TSH (Thyroid Stimulating Hormone) | 4 weeks | TSH as micro international unit per milliliter |
| T3 (triiodothyronine) free | 4 weeks | T3 free as picogram per milliliter |
| Testosterone free | 4 weeks | Testosterone free as picogram per milliliter |
| IL-6 | 4 weeks | IL-6 as picogram per milliliter |
| TNFalfa | 4 weeks | TNFalfa as picogram per milliliter |
| IGF-1 | 4 weeks | IGF-1 as nanogram per milliliter |
| Insulin | 4 weeks | Insulin micro international unit per milliliter |
| creatin kinase | 4 weeks | creatin kinase as milligram per deciliter |
| Eosinophils | 4 weeks | Eosinophils as percentage of total white blood cells |
| Monocytes | 4 weeks | Monocytes as percentage of total white blood cells |
Countries
Italy
Outcome results
None listed