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- Registro degli studi clinici negli Stati Uniti
- Sperimentazione clinica NCT00360516
Paleolithic Diet and Exercise Study
Paleolithic Diets, Exercise Physiology and Metabolism
Panoramica dello studio
Stato
Condizioni
Intervento / Trattamento
Descrizione dettagliata
Because genetic evolutionary changes occur slowly in Homo sapiens, and because the traditional diet of Homo sapiens underwent dramatic changes within recent times, modern humans are better physiologically adapted to a diet similar to the one their hominid ancestors evolved on than to the diet typical of modern industrialized societies. The investigators developed a computational model to estimate the net acid load of diets from the nutrient composition of the diet's component ingredients, and suggest that the majority of these hominid diets yield a negative net acid load (that is, yield a net base load), in addition to being low in sodium chloride, high in potassium-containing fruits and vegetables, and low in saturated fats, with the majority of the non-animal-source calories coming from fruits and vegetables, not from acid-producing grains, separated fats and oils, starches and refined sugars. According to paleonutritionists, Homo sapiens' recent switch from their ancestral Paleolithic-type diet to the modern Western diet has contributed in a major way to so-called age-related diseases of civilization. The investigators hypothesize and will test whether:
- consuming a high-potassium, low-sodium, net base-producing "Paleolithic-type" diet, even in the short term, has detectable beneficial effects on cardiovascular physiology, serum lipid profiles, insulin sensitivity, and exercise performance; and
- their computational model predicts the measured negative net acid loads of a net base-producing "Paleolithic-type" diet, using steady-state values of renal net acid excretion as the measure of the diet net acid load (a.k.a., net endogenous acid production), which will be of value in constructing net-base producing diets for modern consumption.
The long term complications of the combination of high blood pressure, high blood sugar and high fat and cholesterol levels, sometimes called the "metabolic syndrome", has been termed the number one medical problem in modern society today. If eating a "Paleolithic" diet helps improve these diseases, this would be the first step in both improving people's health as they get older as well as contributing to future national dietary guidelines for Americans.
Tipo di studio
Iscrizione (Effettivo)
Fase
- Non applicabile
Contatti e Sedi
Luoghi di studio
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California
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San Francisco, California, Stati Uniti, 94143
- UCSF 505 Parnassus Ave
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Criteri di partecipazione
Criteri di ammissibilità
Età idonea allo studio
Accetta volontari sani
Sessi ammissibili allo studio
Descrizione
Inclusion Criteria:
- Age >= 18 years and <= 55 years
- On no medications
- Body mass index (BMI) between 18 and 29.9 kg/m2
- Normal renal and hepatic function
- Subjects who report moderate intensity exercising <= three times a week for 30 minutes or less, who then qualify by exercise testing with a VO2max at or below age- and gender-matched controls
Exclusion Criteria:
- Subjects who must follow a specific diet
- Subjects on any daily medications
- Subjects unwilling to follow the diet specified
- Subjects unable to do the exercise testing
- Pregnant women
- Subjects who are unable to understand the consent form.
Piano di studio
Come è strutturato lo studio?
Dettagli di progettazione
- Scopo principale: Prevenzione
- Assegnazione: Non randomizzato
- Modello interventistico: Assegnazione di gruppo singolo
- Mascheramento: Nessuno (etichetta aperta)
Cosa sta misurando lo studio?
Misure di risultato primarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
---|---|---|
validation of algorithm to predict diet net acid load
Lasso di tempo: 1year
|
measuring 24-hour net acid and comparing this to the estimated diet acid load using one of several algorithms
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1year
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Misure di risultato secondarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
---|---|---|
effects of a "Paleolithic" diet on exercise capacity, vascular reactivity, lactate production during exercise, glucose and lipid profiles and
Lasso di tempo: 1 year
|
measuring VO2max, CO, BAR,
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1 year
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Collaboratori e investigatori
Investigatori
- Investigatore principale: Lynda A Frassetto, University of California, San Francisco
Pubblicazioni e link utili
Pubblicazioni generali
- Sebastian A, Frassetto LA, Sellmeyer DE, Merriam RL, Morris RC Jr. Estimation of the net acid load of the diet of ancestral preagricultural Homo sapiens and their hominid ancestors. Am J Clin Nutr. 2002 Dec;76(6):1308-16. doi: 10.1093/ajcn/76.6.1308.
- Frassetto L, Morris RC Jr, Sellmeyer DE, Todd K, Sebastian A. Diet, evolution and aging--the pathophysiologic effects of the post-agricultural inversion of the potassium-to-sodium and base-to-chloride ratios in the human diet. Eur J Nutr. 2001 Oct;40(5):200-13. doi: 10.1007/s394-001-8347-4.
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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 (Stima)
Aggiornamenti dei record di studio
Ultimo aggiornamento pubblicato (Stima)
Ultimo aggiornamento inviato che soddisfa i criteri QC
Ultimo verificato
Maggiori informazioni
Termini relativi a questo studio
Parole chiave
Altri numeri di identificazione dello studio
- H8748-27380-02
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 .