niceone said:
easy.. My first comment was that I personally do not recommend working out long enough that you would need to eat or drink anything during your workout.
Which I already agreed with, so again, I don't understand what that was in reference to:
Having said that, I'll agree that if the workout is a "normal" workout at or under an hour, you don't need to drink anything other than water.
my second comment... Im saying that you wont be stimulating much growth hormone if you are eating or drinking anything during your workout. I know that working out stimulates growth hormones.
...And again, carbohydrate/protein introduction can greatly shift hormonal profiles to favorable anabolic conditions. And the point about carb ingestion negatively affecting Growth Hormone secretion, and hence results, is wrong (and in any case, growth hormone secretion is highest at night during sleep):
Nutrition. 2006 Apr;22(4):367-75. Epub 2006 Feb 10. Related Articles, Links
Effects of liquid carbohydrate/essential amino acid ingestion on acute hormonal response during a single bout of resistance exercise in untrained men.
Bird SP, Tarpenning KM, Marino FE.
School of Human Movement Studies, Charles Sturt University, Bathurst, New South Wales, Australia.
sbirg@csu.edu.au
OBJECTIVE: The primary objective of this study was to investigate the influence of nutritive interventions on acute hormonal responses to a single bout of resistance exercise in untrained young men. Specifically, the aim was to determine whether the acute hormonal milieu conducive to enhancing skeletal muscle hypertrophic adaptation to resistance training could be created. The potential role of cortisol in inhibiting training-induced muscle growth is of particular interest, as is whether exercise-induced cortisol release can be attenuated by nutritive interventions. METHODS: After a 4-h fast, 32 subjects performed a single bout of resistance exercise ( approximately 60 min), during which they consumed a 6% carbohydrate (CHO) solution, a 6-g essential amino acid (EAA) mixture, a combined CHO+EAA supplement, or a placebo beverage. Blood samples were collected every 15 min throughout the exercise bout, immediately after exercise, and 15 and 30 min after exercise for analysis of total testosterone, cortisol, growth hormone, insulin, and glucose. RESULTS: No significant change in glucose or insulin was observed for placebo. CHO and CHO+EAA ingestion resulted in significantly (P < 0.001) increased glucose and insulin concentrations above baseline, whereas EAA resulted in significant postexercise increases (P < 0.05) in insulin only. Placebo exhibited a significant increase in cortisol within 30 min (P < 0.01), with a peak increase of 105% (P < 0.001) immediately after exercise, and cortisol remained 54% above baseline at 30 min after exercise (P < 0.05). Conversely, the treatment groups displayed no significant change in cortisol during the exercise bout, with CHO and CHO+EAA finishing 27% (P < 0.01) and 23% (P < 0.05), respectively, below baseline at 30 min after exercise.
No between-group differences in exercise-induced growth hormone or testosterone concentrations after nutritive intervention were present. CONCLUSION: These data indicate that CHO and/or EAA ingestion during a single bout of resistance exercise suppresses the exercise-induced cortisol response, in addition to stimulating insulin release. We conclude that the exercise-induced hormonal profile can be influenced by nutritive interventions toward a profile more favorable for anabolism.
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The Journal of Strength and Conditioning Research: Vol. 17, No. 1, pp. 187–196.
Carbohydrate Supplementation and Resistance Training
G. GREGORY HAFF
Human Performance Laboratory, Midwestern State University, Wichita Falls, Texas 76308
MARK J. LEHMKUHL and LORA B. McCOY
Exercise Physiology Laboratory, Appalachian State University, Boone, North Carolina 28607
MICHAEL H. STONE
Sport Science, United States Olympic Committee, Colorado Springs, Colorado 80909
ABSTRACT
There is a growing body of evidence suggesting that the performance of resistance-training exercises can elicit a significant glycogenolytic effect that potentially could result in performance decrements. These decrements may result in less than optimal physiological adaptations to training. Currently some scientific evidence suggests that carbohydrate supplementation prior to and during high-volume resistance training results in the maintenance of muscle glycogen concentration, which potentially could result in the maintenance or increase of performance during a training bout.
Some researchers suggest that ingesting carbohydrate supplements prior to and during resistance training may improve resistance-training performance. Additionally, the ingestion of carbohydrates following resistance exercise enhances the resynthesis of muscle glycogen, which may result in a faster time of recovery from resistance training, thus possibly allowing for a greater training volume.
On the basis of the current scientific literature, it may be advisable for athletes who are performing high-volume resistance training to ingest carbohydrate supplements before, during, and immediately after resistance training.
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