- ICH GCP
- Registro degli studi clinici negli Stati Uniti
- Sperimentazione clinica NCT04097171
The Effect of Diet Composition on Performance, Expenditure, Blood Lipids, and Appetite Hormones in Highly Trained Cyclists (DCAP)
The Effect of Diet Composition on Performance, Energy Expenditure, Blood Lipids and Lipoproteins, and Cognitive Function and Mood States in Highly Trained Cyclists
Panoramica dello studio
Descrizione dettagliata
Traditionally, a high carbohydrate diet is recommended for elite endurance athletes and sub-elite, highly trained recreational athletes competing in endurance events. However, recently the ketogenic diet (extremely low carbohydrate content) has become popular in these populations. The effect on endurance exercise performance, energy expenditure, postprandial blood profiles, and cognitive function and mood states requires further investigation.
In this study, highly trained recreational cyclists and triathletes will adhere to each diet (high-carbohydrate and ketogenic) for 14 days in a crossover design. Experimental trials at baseline and after each diet will evaluate endurance cycling performance (time trial), resting energy expenditure, the thermic effect of food of test meals corresponding in composition to each diet, postprandial responses of blood lipids, glucose and appetite hormones, and cognitive function and mood states.
Tipo di studio
Iscrizione (Effettivo)
Fase
- Non applicabile
Contatti e Sedi
Luoghi di studio
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Texas
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Fort Worth, Texas, Stati Uniti, 76129
- Texas Christian University
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Criteri di partecipazione
Criteri di ammissibilità
Età idonea allo studio
Accetta volontari sani
Sessi ammissibili allo studio
Descrizione
Inclusion Criteria:
- >100-150km of cycling per week
- VO2max > 80th percentile for sex and age (adjusted for cycle ergometry)
- apparently healthy
Exclusion Criteria:
- weight loss supplements/medications/diet
- extreme dietary patterns (e.g. extremely high or low carbohydrate)
- nicotine use
- heavy alcohol use (>7 drinks/week female; >14 drinks/week male)
- food allergies
- diabetes
- heart disease
- stroke
- liver/kidney/thyroid disease
- anemia
- eating disorders
- uncontrolled hypertension
- pulmonary/orthopedic/musculoskeletal problems that prevent exercise
- surgery that affects swallowing and digestion
- claustrophobia
Piano di studio
Come è strutturato lo studio?
Dettagli di progettazione
- Scopo principale: Scienza basilare
- Assegnazione: Randomizzato
- Modello interventistico: Assegnazione incrociata
- Mascheramento: Nessuno (etichetta aperta)
Armi e interventi
Gruppo di partecipanti / Arm |
Intervento / Trattamento |
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Sperimentale: High Carbohydrate Diet
Participants will consume a high carbohydrate diet (65-75% of total energy intake).
Protein intake will be standardized at 15% of total energy intake.
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Participants will consume each diet for 14 days in a crossover design.
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Sperimentale: Ketogenic Diet
Participants will consume a low carbohydrate diet (<5-10% of total energy intake).
Protein intake will be standardized at 15% of total energy intake.
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Participants will consume each diet for 14 days in a crossover design.
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Cosa sta misurando lo studio?
Misure di risultato primarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
---|---|---|
Endurance Cycling Performance
Lasso di tempo: 180 min after the meal begins
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Time to completion in a 30-kilometer simulated time trial
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180 min after the meal begins
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Misure di risultato secondarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
---|---|---|
Respiratory Exchange Ratio
Lasso di tempo: Change from baseline at 30 min, 60 min, 90 min, 120 min, 150 min, 180 min, 192 min, 204 min, 216 min, 228 min and 240 min after the meal begins
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Indirect calorimetry fasted, postprandial, and during exercise
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Change from baseline at 30 min, 60 min, 90 min, 120 min, 150 min, 180 min, 192 min, 204 min, 216 min, 228 min and 240 min after the meal begins
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Muscle Fuel Rating
Lasso di tempo: Change from baseline at 180 min and 240 min after the meal begins
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Ultrasound echogenicity of Rectus Femoris
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Change from baseline at 180 min and 240 min after the meal begins
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Oxygen consumption (VO2)
Lasso di tempo: At 192 min, 204 min, 216 min, 228 min and 240 min after the meal begins
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Indirect calorimetry during exercise
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At 192 min, 204 min, 216 min, 228 min and 240 min after the meal begins
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Rating of Perceived Exertion (RPE)
Lasso di tempo: At 192 min, 204 min, 216 min, 228 min and 240 min after the meal begins
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6-20 Borg's scale during exercise
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At 192 min, 204 min, 216 min, 228 min and 240 min after the meal begins
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Thermic Effect of Food (postprandial energy expenditure)
Lasso di tempo: Change from baseline at 30 min, 60 min, 90 min, 120 min, 150 min, 180 min after the meal begins
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Fasted vs. postprandial indirect calorimetry
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Change from baseline at 30 min, 60 min, 90 min, 120 min, 150 min, 180 min after the meal begins
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Subjective appetite ratings
Lasso di tempo: Change from baseline at 60 min, 120 min, 180 min after the meal begins
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Visual Analog Scale (Scale 1: Perception of Hunger [0-100 mm]; Scale 2: Perception of Fullness [0-100 mm]; Scale 3: Desire to Eat [0-100 mm]
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Change from baseline at 60 min, 120 min, 180 min after the meal begins
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Appetite hormones including ghrelin, leptin, insulin, and Peptide-YY
Lasso di tempo: Change from baseline at 30 min, 60 min, 120 min, 180 min and 240 min
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Fasted, postprandial & post exercise blood concentration of appetite hormones
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Change from baseline at 30 min, 60 min, 120 min, 180 min and 240 min
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Blood glucose
Lasso di tempo: Change from baseline at 180 min and 240 min after the meal begins; on day 7 of each diet
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Fasted, postprandial & post exercise blood concentration of glucose
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Change from baseline at 180 min and 240 min after the meal begins; on day 7 of each diet
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Blood pressure
Lasso di tempo: Change from baseline at 180 min after the meal begins
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Fasted, postprandial & post exercise
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Change from baseline at 180 min after the meal begins
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Cognitive function
Lasso di tempo: At 180 min and 240 min after the meal begins
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Stroop test
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At 180 min and 240 min after the meal begins
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Mood state questionnaire
Lasso di tempo: At 180 min and 240 min after the meal begins
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Abbreviated Profile of Mood States; 40-item scale; Likert scale from 0 = "not at all" to 4 = "extremely"
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At 180 min and 240 min after the meal begins
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Resting Metabolic Rate
Lasso di tempo: At baseline before meal begins
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Indirect calorimetry in fasted state
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At baseline before meal begins
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Blood lipids including (triglycerides, total cholesterol, low density lipoprotein, and high-density lipoprotein)
Lasso di tempo: Change from baseline at 30 min, 60 min, 120 min, 180 min, 192 min, 204 min, 216 min, 228 min and 240 min after the meal begins
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Fasted and postprandial in mg/dL
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Change from baseline at 30 min, 60 min, 120 min, 180 min, 192 min, 204 min, 216 min, 228 min and 240 min after the meal begins
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Collaboratori e investigatori
Sponsor
Studiare le date dei record
Studia le date principali
Inizio studio (Effettivo)
Completamento primario (Effettivo)
Completamento dello studio (Effettivo)
Date di iscrizione allo studio
Primo inviato
Primo inviato che soddisfa i criteri di controllo qualità
Primo Inserito (Effettivo)
Aggiornamenti dei record di studio
Ultimo aggiornamento pubblicato (Effettivo)
Ultimo aggiornamento inviato che soddisfa i criteri QC
Ultimo verificato
Maggiori informazioni
Termini relativi a questo studio
Altri numeri di identificazione dello studio
- CT2019MS3
Piano per i dati dei singoli partecipanti (IPD)
Hai intenzione di condividere i dati dei singoli partecipanti (IPD)?
Descrizione del piano IPD
Periodo di condivisione IPD
Criteri di accesso alla condivisione IPD
Tipo di informazioni di supporto alla condivisione IPD
- Protocollo di studio
- Piano di analisi statistica (SAP)
- Codice analitico
Informazioni su farmaci e dispositivi, documenti di studio
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Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .
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