karppaus.infon arkistoitu foorumi

On väitetty, että esimerkiksi aamulla lyhyt liikeuntasessio tyhjällä vatsalla olisi erityisen tehokasta rasvanpolton kannalta. Onkohan tässä perää?

Mutta mistäs sen taas niin varmaksi tietää, kun oli vain yksi palanen tässä suuuuressa kuviossa

On väitetty, että esimerkiksi aamulla lyhyt liikeuntasessio tyhjällä vatsalla olisi erityisen tehokasta rasvanpolton kannalta. Onkohan tässä perää?

On väitetty, että esimerkiksi aamulla lyhyt liikeuntasessio tyhjällä vatsalla olisi erityisen tehokasta rasvanpolton kannalta. Onkohan tässä perää?

Teho käsittääkseni johtuu siitä, että aamulla hiilarivarastot ovat tyhjinä ja kropan on pakko polttaa rasvaa.

Skeletal muscle fat and carbohydrate metabolism during recovery from glycogen-depleting exercise in humans.

Kimber NE, Heigenhauser GJ, Spriet LL, Dyck DJ.

Department of Human Biology and Nutritional Sciences, University of Guelph, Guelph, Ontario N1G 2W1, Canada.

The primary aim of the present study was to determine whether intramuscular triacylglycerol (IMTG) utilization contributed significantly to the increase in lipid oxidation during recovery from exercise, as determined from the muscle biopsy technique. In addition, we also examined the regulation of pyruvate dehydrogenase (PDHa) and changes in muscle acetyl units during an 18 h recovery period after glycogen-depleting exercise. Eight endurance-trained males completed an exhaustive bout of exercise (approximately 90 min) on a cycle ergometer followed by ingestion of carbohydrate (CHO)-rich meals (64-70 % of energy from carbohydrate) at 1, 4 and 7 h of recovery. Duplicate muscle biopsies were obtained at exhaustion, and 3, 6 and 18 h of recovery. Despite the large intake of CHO during recovery (491 +/- 28 g or 6.8 +/- 0.3 g kg-1), respiratory exchange ratio values of 0.77 to 0.84 indicated a greater reliance on lipid as an oxidative fuel. However, there was no net IMTG utilization during recovery. IMTG content at exhaustion was 23.5 +/- 3.5 mmol (kg dry wt)-1, and remained constant at 24.6 +/- 2.6, 25.7 +/- 2.8 and 28.4 +/- 3.0 mmol (kg dry wt)-1 after 3, 6 and 18 h of recovery. Muscle glycogen increased significantly from 37 +/- 11 mmol (kg dry wt)-1 at exhaustion, to 165 +/- 13, 250 +/- 18, and 424 +/- 22 mmol (kg dry wt)-1 at 3, 6 and 18 h of recovery, respectively. PDHa was reduced at 6 and 18 h when compared to exhaustion, but did not change during the recovery period. Acetyl-CoA, acetylcarnitine and pyruvate contents declined significantly after 3 h of recovery compared to exhaustion, and thereafter remained unchanged. We conclude that IMTG has a negligible role in contributing to the enhanced fat oxidation during recovery from exhaustive exercise. Despite the elevation of glucose and insulin following high-CHO meals during recovery, CHO oxidation and PDH activation were decreased, supporting the hypothesis that glycogen resynthesis is of high metabolic priority. Plasma fatty acids, very low density lipoprotein triacylglycerols, as well as intramuscular acetylcarnitine stores are likely to be important fuel sources for aerobic energy, particularly during the first few hours of recovery.

Kahvissahan on kofeiinia ja kofeiini on termogeeninen aine. Saman voisi musta tehdä vihreällä teellä, terveellisemmin. Kehonrakentajien ym. dieetillä yleisesti käyttämä "menetelmä".

Kahvissahan on kofeiinia ja kofeiini on termogeeninen aine. Saman voisi musta tehdä vihreällä teellä, terveellisemmin. Kehonrakentajien ym. dieetillä yleisesti käyttämä "menetelmä".

Se ei ole uskon asia

Huomaa että mä en juo kofeiinipitoisia juomia, kuten kahvia.

Effect of chewing gum containing nicotine and caffeine on energy expenditure and substrate utilization in men.

Jessen AB, Toubro S, Astrup A.

Department of Human Nutrition, Centre for Advanced Food Studies, The Royal Veterinary and Agricultural University, Frederiksberg, Denmark.

BACKGROUND: Nicotine replacement therapy limits weight gain after smoking cessation. This finding is partly attributable to the thermogenic effect of nicotine, which may be enhanced by caffeine. OBJECTIVE: We assessed the acute thermogenic effects of chewing gum containing different doses of nicotine and caffeine. DESIGN: This randomized, double-blind, placebo-controlled, crossover study included 12 healthy, normal-weight men (aged 18-45 y). Energy expenditure was measured with indirect calorimetry before and 2.5 h after subjects chewed each of 7 different types of gum containing the following doses of nicotine/caffeine: 0/0, 1/0, 2/0, 1/50, 2/50, 1/100, and 2/100 mg/mg. RESULTS: The thermogenic responses (increases over the response to placebo) were 3.7%, 4.9%, 7.9%, 6.3%, 8.5%, and 9.8%, respectively, for the gums containing 1/0, 2/0, 1/50, 2/50, 1/100, and 2/100 mg nicotine/mg caffeine (P < 0.05 for all). Adding caffeine to 1 and 2 mg nicotine significantly enhanced the thermogenic response, but changing the caffeine dose (from 50 to 100 mg) did not change the thermogenic effect. None of the combinations changed the respiratory quotient compared with placebo, which indicates that glucose and fat oxidation rates were increased to a similar extent. Side effects occurred only with 2 mg nicotine. CONCLUSIONS: One milligram of nicotine has a pronounced thermogenic effect, which can be increased by approximately 100% by adding 100 mg caffeine. Increasing the nicotine dose to 2 mg does not increase the thermogenic effect but produces side effects in most subjects. Caffeine may be useful in preventing weight gain after smoking cessation if its thermogenic effect can be used to enhance nicotine's effect on long-term energy balance.