- ICH GCP
- Registre américain des essais cliniques
- Essai clinique NCT00360516
Paleolithic Diet and Exercise Study
Paleolithic Diets, Exercise Physiology and Metabolism
Aperçu de l'étude
Statut
Les conditions
Intervention / Traitement
Description détaillée
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.
Type d'étude
Inscription (Réel)
Phase
- N'est pas applicable
Contacts et emplacements
Lieux d'étude
-
-
California
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San Francisco, California, États-Unis, 94143
- UCSF 505 Parnassus Ave
-
-
Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
Accepte les volontaires sains
Sexes éligibles pour l'étude
La description
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.
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: La prévention
- Répartition: Non randomisé
- Modèle interventionnel: Affectation à un seul groupe
- Masquage: Aucun (étiquette ouverte)
Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Description de la mesure |
Délai |
---|---|---|
validation of algorithm to predict diet net acid load
Délai: 1year
|
measuring 24-hour net acid and comparing this to the estimated diet acid load using one of several algorithms
|
1year
|
Mesures de résultats secondaires
Mesure des résultats |
Description de la mesure |
Délai |
---|---|---|
effects of a "Paleolithic" diet on exercise capacity, vascular reactivity, lactate production during exercise, glucose and lipid profiles and
Délai: 1 year
|
measuring VO2max, CO, BAR,
|
1 year
|
Collaborateurs et enquêteurs
Parrainer
Les enquêteurs
- Chercheur principal: Lynda A Frassetto, University of California, San Francisco
Publications et liens utiles
Publications générales
- 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.
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude
Achèvement primaire (Réel)
Achèvement de l'étude (Réel)
Dates d'inscription aux études
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première publication (Estimation)
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Estimation)
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Plus d'information
Termes liés à cette étude
Mots clés
Autres numéros d'identification d'étude
- H8748-27380-02
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