Entrenar en ayunas puede mejorar ciertos parámetros

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Entrenar en ayunas puede mejorar ciertos parámetros

Notapor Fisio » Mié, 17 Jun 2015, 22:52

Más hormesis. La periodización nutricional puede ser interesante.

Adaptations to skeletal muscle with endurance exercise training in the acutely fed versus overnight-fasted state.
Stannard SR1, Buckley AJ, Edge JA, Thompson MW.
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1Institute of Food Nutrition and Human Health, Massey University, Palmerston North, New Zealand. S.Stannard@massey.ac.nz

Abstract

Minimising carbohydrate (CHO) status in the peri-training period may accelerate the training adaptations normally observed. The aim of this study was to compare adaptations to endurance training undertaken in the acutely CHO fed and overnight-fasted states. Eight female and six male untrained, healthy participants: aged 26.6+/-5.8 years (mean+/-SD); height 174.7+/-7.6 cm; weight 75.3+/-11.4 kg; VO(2max) 3.48+/-0.67 l/min; were randomly divided into two training groups and undertook four weeks of five days per week endurance cycle ergometer training in either the overnight-fasted (FAST) or acutely fed (FED) state. FAST training had no effect on RER or plasma glucose, lactate and FFA concentrations during subsequent submaximal exercise. Training-induced changes in Vastus lateralis citrate synthase (CS) and 3-hydroxy-CoA dehydrogenase (HAD) activities were not different between training groups (P=0.655 and 0.549, respectively), but when the effect of gender was considered, men responded better to FAST and women responded better to FED. The FAST group showed a significantly greater training-induced increase in VO(2max) and resting muscle glycogen concentration than FED (P=0.014 and P=0.047 respectively), but there was no gender interaction. In conclusion, these results suggest that (a) meal ingestion prior to daily exercise can modify some of the exercise training-induced adaptations normally seen with endurance training compared to when daily exercise is undertaken in the overnight-fasted state; and (b) the extent of these adaptations in skeletal muscle differ slightly between men and women.


http://www.ncbi.nlm.nih.gov/pubmed/20452283
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Re: Entrenar en ayunas puede mejorar ciertos parámetros

Notapor Moldeate » Vie, 07 Ago 2015, 08:46

Manteniendo el ayuno tomando un té, ahí va otro articulo (aunque la muestra es muy pequeña). Los resultados muy claros.

http://www.ncbi.nlm.nih.gov/pubmed/26184298

[i]Green Tea, Intermittent Sprinting Exercise, and Fat Oxidation.

Gahreman D1, Wang R2, Boutcher Y3, Boutcher S4.

Author information

1Department of Exercise and Sport Science, Charles Darwin University, Ellengowan Drive, Casuarina, Northern Territory 0811, Australia. daniel.gahreman@cdu.edu.au.
2School of Medical Sciences, Faculty of Medicine, University of New South Wales, High Street, Randwick, Sydney, New South Wales 2052, Australia. rose.wang589@gmail.com.
3School of Medical Sciences, Faculty of Medicine, University of New South Wales, High Street, Randwick, Sydney, New South Wales 2052, Australia. y.boutcher@unsw.edu.au.
4School of Medical Sciences, Faculty of Medicine, University of New South Wales, High Street, Randwick, Sydney, New South Wales 2052, Australia. s.boutcher@unsw.edu.au.

Abstract

Fat oxidation has been shown to increase after short term green tea extract (GTE) ingestion and after one bout of intermittent sprinting exercise (ISE). Whether combining the two will result in greater fat oxidation after ISE is undetermined. The aim of the current study was to investigate the combined effect of short term GTE and a single session of ISE upon post-exercise fat oxidation. Fourteen women consumed three GTE or placebo capsules the day before and one capsule 90 min before a 20-min ISE cycling protocol followed by 1 h of resting recovery. Fat oxidation was calculated using indirect calorimetry. There was a significant increase in fat oxidation post-exercise compared to at rest in the placebo condition (p < 0.01). After GTE ingestion, however, at rest and post-exercise, fat oxidation was significantly greater (p < 0.05) than that after placebo. Plasma glycerol levels at rest and 15 min during post-exercise were significantly higher (p < 0.05) after GTE consumption compared to placebo. Compared to placebo, plasma catecholamines increased significantly after GTE consumption and 20 min after ISE (p < 0.05). Acute GTE ingestion significantly increased fat oxidation under resting and post-exercise conditions when compared to placebo.
[/i]
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Re: Entrenar en ayunas puede mejorar ciertos parámetros

Notapor Fisio » Vie, 07 Ago 2015, 18:35

Bueno ahí lo que hay que mirar es si se pierde peso, y mejor aún, masa grasa. Que exista una mayor oxidación no implica que el nivel sea clínicamente importante para traducirse en algo tangible.
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