Če bi dodali še prosti leucin ( ki je znan po efektih na protein sintezo ), glutamin in arginin ter prebavne encime ( za več bioaktivnih peptidov ) ter Beta Ecdysteron ( za večje zadrževanje dušika ) bi bil efekt še veliko boljši
Tako dobimo idelno razmerje esencialnih proti neesencialnim aminokislinam ( 50 % : 50 % ).
Vse to je PEAK združil v svojem fantastičnem izdelku z imenom Anabolic Protein Fusion
J Int Soc Sports Nutr. 2007; 4: 4.
Published online 2007 July 23. doi: 10.1186/1550-2783-4-4. PMCID: PMC1997115
Copyright © 2007 Kalman et al; licensee BioMed Central Ltd.
Effect of protein source and resistance training on body composition and sex hormones
Douglas Kalman,1 Samantha Feldman,1 Michele Martinez,1 Diane R Krieger,1 and Mark J Tallon1
1Miami Research Associates, Nutrition/Endocrinology Division, Miami, Florida, USA
Corresponding author.
Douglas Kalman:
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; Samantha Feldman:
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; Michele Martinez:
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; Diane R Krieger:
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; Mark J Tallon:
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Received June 14, 2007; Accepted July 23, 2007.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Background
Evidence suggests an inverse relationship between soy protein intake and serum concentrations of male sex hormones. Anecdotal evidence indicates that these alterations in serum sex hormones may attenuate changes in lean body mass following resistance training. However, little empirical data exists regarding the effects of soy and milk-based proteins on circulating androgens and exercise induced body composition changes.
Methods
For 12 weeks 20 subjects were supplemented with 50 g per day of one of four different protein sources (Soy concentrate; Soy isolate; Soy isolate and whey blend, and Whey blend only) in combination with a resistance-training program. Body composition, testosterone, estradiol and sex hormone binding globulin (SHBG) were measured at baseline and week 12.
Results
Protein supplementation resulted in a significant increase in lean body mass independent of protein source (0.5 ± 1.1 and 0.9 ± 1.4 kg, p = 0.006, p = 0.007). No significant differences were observed between groups for total and free testosterone, SHBG, percentage body fat, BMI or body weight. The Testosterone/Estradiol ratio increased across all groups (+13.4, p = 0.005) and estradiol decreased (p = 0.002). Within group analysis showed significant increases in the Testosterone/Estradiol ratio in soy isolate + whey blend group (+16.3, p = 0.030). Estradiol was significantly lower in the whey blend group (-9.1 ± 8.7 pg/ml, p = 0.033).
Conclusion
This investigation shows that 12 week supplementation with soy protein does not decrease serum testosterone or inhibit lean body mass changes in subjects engaged in a resistance exercise program
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