duminică, 31 ianuarie 2010
joi, 28 ianuarie 2010
no fuckin difference...low fat slightly healthier
Diabetes. 2009 Dec;58(12):2741-8. Epub 2009 Aug 31.
Low-fat versus low-carbohydrate weight reduction diets: effects on weight loss, insulin resistance, and cardiovascular risk: a randomized control trial.
Bradley U, Spence M, Courtney CH, McKinley MC, Ennis CN, McCance DR, McEneny J, Bell PM, Young IS, Hunter SJ.
Regional Centre for Endocrinology and Diabetes, Royal Victoria Hospital, Belfast, U.K.
OBJECTIVE: Low-fat hypocaloric diets reduce insulin resistance and prevent type 2 diabetes in those at risk. Low-carbohydrate, high-fat diets are advocated as an alternative, but reciprocal increases in dietary fat may have detrimental effects on insulin resistance and offset the benefits of weight reduction. RESEARCH DESIGN AND METHODS: We investigated a low-fat (20% fat, 60% carbohydrate) versus a low-carbohydrate (60% fat, 20% carbohydrate) weight reduction diet in 24 overweight/obese subjects ([mean +/- SD] BMI 33.6 +/- 3.7 kg/m(2), aged 39 +/- 10 years) in an 8-week randomized controlled trial. All food was weighed and distributed, and intake was calculated to produce a 500 kcal/day energy deficit. Insulin action was assessed by the euglycemic clamp and insulin secretion by meal tolerance test. Body composition, adipokine levels, and vascular compliance by pulse-wave analysis were also measured. RESULTS: Significant weight loss occurred in both groups (P < p =" 0.40)." p =" 0.28)," p =" 0.71)." p =" 0.04);">, with no difference between groups (P = 0.40). Peripheral glucose uptake increased, but there was no difference between groups (P = 0.28), and suppression of endogenous glucose production was also similar between groups. Meal tolerance-related insulin secretion decreased with weight loss with no difference between groups (P = 0.71). The change in overall systemic arterial stiffness was, however, significantly different between diets (P = 0.04); this reflected a significant decrease in augmentation index following the low-fat diet, compared with a nonsignificant increase within the low-carbohydrate group. CONCLUSIONS: This study demonstrates comparable effects on insulin resistance of low-fat and low-carbohydrate diets independent of macronutrient content. The difference in augmentation index may imply a negative effect of low-carbohydrate diets on vascular risk.
PMID: 19720791 [PubMed - indexed for MEDLINE]
miercuri, 27 ianuarie 2010
marți, 26 ianuarie 2010
margarina
In ultimele zile m-a surprins agresivitatea campaniei de promovare a Rama. Este de inteles, informatia ca margarina este nociva a ajuns pana si in cel mai indepartat sat din Romania. Si ce s-au gandit, cea mai buna aparare e atacul. Rama nu ca nu e nociva, e chiar sanatoasa. Ne jucam cu niste cuvinte mari, amintim de omega 3 si 6 (mama ce sanatos suna), aducem niste vedete si gata...daca spune Nadia ca e buna, ii da si lu ala micu, pfffff, 3 cutii de Rama va rog...
Am intrat si eu, disperat de campania lor, pe desprerama punct ro. Ma asteptam sa citesc ceva despre ingrediente, un profil nutritional (daca nu stii ce e aia intra de exemplu pe nutritiondata.com), informatii despre modul in care este produsa. De unde. Numai informatii penibile, aruncate la gramada sa dea o aparenta de stiinta solida in spatele produsului, cu alte cuvinte bull shit.
In concluzie, ramane cum am stabilit, margarina nu, UNT da !
luni, 25 ianuarie 2010
carbohidratii sunt raaaai....aha
Eur J Appl Physiol. 2009 Dec 20. [Epub ahead of print]
Influence of dietary carbohydrate intake on the free testosterone: cortisol ratio responses to short-term intensive exercise training.
Lane AR, Duke JW, Hackney AC.
Endocrine Section, Applied Physiology Laboratory, Department of Exercise and Sport Science, University of North Carolina, CB # 8700, Fetzer Building, Chapel Hill, NC, 27599, USA.
This study examined the effect of dietary carbohydrate (CHO) consumption on the free testosterone to cortisol (fTC) ratio during a short-term intense micro-cycle of exercise training. The fTC ratio is a proposed biomarker for overreaching-overtraining (i.e., training stress or imbalance) in athletes. The ratio was studied in two groups, control-CHO (~60% of daily intake, n = 12) and low-CHO (~30% of daily intake, n = 8), of male subjects who performed three consecutive days of intensive training (~70-75% maximal oxygen consumption, 60 min per day) with a dietary intervention (on the day before and during training). Resting, pre-exercise blood samples were collected under standardized-controlled conditions before each day of training (Pre 1, 2, 3) and on a fourth day after the micro-cycle (Rest). Bloods were analyzed for free testosterone and cortisol via radioimmunoassay procedures. Subjects performed no additional physical activity other than prescribed training. Statistical analysis (ANCOVA) revealed the fTC ratio decreased significantly (p <> 0.05) in the control-CHO group (-3%). Findings suggest if the fTC ratio is utilized as a marker of training stress or imbalance it is necessary for a moderately high diet of CHO to be consumed to maintain validity of any observed changes in the ratio value.
Influence of dietary carbohydrate intake on the free testosterone: cortisol ratio responses to short-term intensive exercise training.
Lane AR, Duke JW, Hackney AC.
Endocrine Section, Applied Physiology Laboratory, Department of Exercise and Sport Science, University of North Carolina, CB # 8700, Fetzer Building, Chapel Hill, NC, 27599, USA.
This study examined the effect of dietary carbohydrate (CHO) consumption on the free testosterone to cortisol (fTC) ratio during a short-term intense micro-cycle of exercise training. The fTC ratio is a proposed biomarker for overreaching-overtraining (i.e., training stress or imbalance) in athletes. The ratio was studied in two groups, control-CHO (~60% of daily intake, n = 12) and low-CHO (~30% of daily intake, n = 8), of male subjects who performed three consecutive days of intensive training (~70-75% maximal oxygen consumption, 60 min per day) with a dietary intervention (on the day before and during training). Resting, pre-exercise blood samples were collected under standardized-controlled conditions before each day of training (Pre 1, 2, 3) and on a fourth day after the micro-cycle (Rest). Bloods were analyzed for free testosterone and cortisol via radioimmunoassay procedures. Subjects performed no additional physical activity other than prescribed training. Statistical analysis (ANCOVA) revealed the fTC ratio decreased significantly (p <> 0.05) in the control-CHO group (-3%). Findings suggest if the fTC ratio is utilized as a marker of training stress or imbalance it is necessary for a moderately high diet of CHO to be consumed to maintain validity of any observed changes in the ratio value.
vineri, 22 ianuarie 2010
joi, 21 ianuarie 2010
miercuri, 13 ianuarie 2010
joi, 7 ianuarie 2010
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