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ABORRO la Zona, per cui vi posto questi che non la fanno ben apparire (sn cmq "incompleti")
The zone diet and athletic performance.
Cheuvront SN.
Department of Nutrition, Food, and Exercise Sciences, Florida State University, Tallahassee, USA.
The Zone diet is the latest eating regimen marketed to improve athletic performance by opposing traditional high carbohydrate sports diets. The 40/30/30 diet is centred primarily on protein intake (1.8 to 2.2 g/kg fat free mass; i.e. total bodyweight-fat weight) and promises a change in the body's insulin to glucagon ratio through its macronutrient alterations. Changes in the existing hormonal milieu are said to result in the production of more vasoactive eicosanoids, thus allowing greater oxygen delivery to exercising muscle.
La Zona porta ad un miglior rapporto insulina/glucagone e maggior produzione di eicosanoidi vasodilatatori permettendo di allenare i muscoli in condizione di maggiore ossigenazione
This favourable condition, known as the Zone, is anecdotally reported to benefit even the most elite endurance athletes. Applying the Zone's suggested protein needs and macronutrient distributions in practice, it is clear that it is a low carbohydrate diet by both relative and absolute standards, as well as calorie deficient by any standard. Reliable and abundant peer reviewed literature is in opposition to the suggestion that such a diet can support competitive athletic endeavours, much less improve them. The notion that a 40/30/30 diet can alter the pancreatic hormone response in favour of glucagon is also unfounded. The Zone is a mixed diet and not likely to affect pancreatic hormone release in the same way individual nutrients can. Although the postprandial insulin response is reduced when comparing a 40% with a 60% carbohydrate diet, it is still a sufficient stimulus to offset the lipolytic effects of glucagon.
Si dice che la Zona migliori le prestazioni atletiche. La nozione che il rapporto 40-30-30 migliori le secrezioni pancreatiche è infondata. La Zona è una dieta variata e quindi influisce in modo diverso sul rilascio degli ormoni pancreatici da come portrebbero fare i singoli nutrienti; nonostante la risp insulinica sia ridotta (comparando diete cn 40% e 60% di chos rispettivamente) cmq sia ha uno stimolo sufficiente a bloccare gli effetti lipolitici del glucagone.
Many of the promised benefits of the Zone are based on selective information regarding hormonal influences on eicosanoid biology. Contradictory information is conveniently left out. The principle of vasodilating muscle arterioles by altering eicosanoid production is notably correct in theory. However, what little human evidence is available does not support any significant contribution of eicosanoids to active muscle vasodilation. In fact, the key eicosanoid reportedly produced in the Zone and responsible for improved muscle oxygenation is not found in skeletal muscle. Based on the best available scientific evidence, the Zone diet should be considered more ergolytic than ergogenic to performance.
Molti degli aspetti benefici della Zona sono basati traendo spunto da una selezione di studi tagliando fuori informazioni contraddittorie. Il principio della vasodilatazione muscolare è in teoria corretto ma non è stata scientificamente provata una migliore ossigenazione nei muscoli scheletrici. Basandoci sulla migliore evidenza scientifica disponibile, la dieta a Zona dovrebbe essere considerata più ergolitica che ergogenica.
The acute 1-week effects of the Zone diet on body composition, blood lipid levels, and performance in recreational endurance athletes.
Jarvis M, McNaughton L, Seddon A, Thompson D.
Department of Life Sciences, Kingston University, Kingston KT1 2EE, England.
The aim of this study was to examine the effects of a 7-day Zone diet compared with a normal diet on maximal oxygen uptake (V(O)2 max), running time to exhaustion during endurance performance, and body composition. Eight men, with the following physical characteristics (mean +/- SE), participated in this study: age, 26.1 +/- 1.9 years; height, 178 +/- 1.7 cm; mass, 70.7 +/- 2.1 kg; and V(O)2 max, 54.6 +/- 3.1 ml x kg(-1) x min(-1). All subjects undertook pretesting for V(O)2 max, time to exhaustion (80% V(O)2 max), and body composition (Biostat 1500) before following either the normal diet or the Zone diet for 7 days. These performance trials were performed before and after the dietary period. There was a significant (p < 0.05) decrease in total energy consumption from a mean of 2,314 +/- 334 kcal on a pretest diet to 1,994 +/- 438 kcal on the Zone diet. Subjects showed a significant reduction (p < 0.02) in body mass from 70.7 +/- 2.1 kg to 69.8 +/- 2.1 kg. In the 80% V(O)2 max time to exhaustion trial, there was a significant reduction (p < 0.05) in time to exhaustion from 37.68 +/- 8.6 minutes for the pretest diet to 34.11 +/- 7.01 minutes for the Zone diet. In conclusion, the claim of the authors of the Zone diet that performance time and V(O)2 max can be improved was not shown in this 1-week research trial. We would suggest that this is not a nutritional strategy that athletes should use until further work has been conducted.
Questo è lo studio che dimostra che non c'è un miglioramento nell'ossigenazione del muscolo scheletrico.
cmq da quello studio nn ho trovato un buon motivo per il quale la zona non sia una buona dieta.....
Originariamente Scritto da the tongue
anche a me piace il micione nero di 7 chili e mezzo a cui fare le fusa figurati, ma io mi riferivo specificamente allo sporgere delle piccole labbra dalle grandi labbra.sgradevole chiaro?
gli studi vanno sempre interpretati (condizioni, soggetti ecc..)
grazie
cmq sul web c'è l'articolo in italiano.....evita di fare il figo postando in inglese
scherzo....sei sempre il benvenuto amico
Originariamente Scritto da the tongue
anche a me piace il micione nero di 7 chili e mezzo a cui fare le fusa figurati, ma io mi riferivo specificamente allo sporgere delle piccole labbra dalle grandi labbra.sgradevole chiaro?
uno studio "in inglese" ha certificato che l'assunzione prolungata di alcool inibisce la corretta espressione nella propria lingua madre...
ahahahhahh
ciao Fab
Originariamente Scritto da the tongue
anche a me piace il micione nero di 7 chili e mezzo a cui fare le fusa figurati, ma io mi riferivo specificamente allo sporgere delle piccole labbra dalle grandi labbra.sgradevole chiaro?
anche a me piace il micione nero di 7 chili e mezzo a cui fare le fusa figurati, ma io mi riferivo specificamente allo sporgere delle piccole labbra dalle grandi labbra.sgradevole chiaro?
DIETA
colazione 8:00
330 ml albume+22 gr burro d'arachidi+30 gr fiocchi d'avena+mela
spuntino (post wo)12:00
30 gr whey+65 gr gallette+20 gr miele
pranzo 14:00
140 gr tonno nat.+60 gr riso+30 gr olio oliva
pre-cena
30 gr whey
cena 21:00
pizza bianca bresaola rughetta e mozzarella a fette....a casa delle mie pollastre
ALLENAMENTO
SQUAT 5X5 5-5-5-4-4 86 KG +1
ROMANIAN 5X5 80 KG (easy)
LENTO 2 MAN. 5X5 22-20-20-20-20 KG
ALZ LAT 5X10-8 10-10-10-10-8 8 KG
SIDE BEND 3X12 16 KG
WEIGHTED LYING TWIST 2X12
CONSIDERAZIONI:bene bene il workout....stasera pizza con amichealtro che cut
Originariamente Scritto da the tongue
anche a me piace il micione nero di 7 chili e mezzo a cui fare le fusa figurati, ma io mi riferivo specificamente allo sporgere delle piccole labbra dalle grandi labbra.sgradevole chiaro?
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