[Good Eats]
Wehr, E., et al. “Association of vitamin D status with serum androgen levels in men.” Clin Endocrinol (Oxf). 2009 Dec 29.
Wehr, E; Pilz, S; Boehm, BO; März, W; Obermayer-Pietsch, B. Association of vitamin D status with serum androgen levels in men. Clin Endocrinol (Oxf). 2009;
[Stack of the Month]
Elliott, T. A., et al. Milk ingestion stimulates net muscle protein synthesis following resistance exercise. Med Sci Sports Exerc. 2006 Apr;38(4):667-74.
Tipton, K. D., et al. Stimulation of net muscle protein synthesis by whey protein ingestion before and after exercise. Am J Physiol Endocrinol Metab 292: E71-E76, 2006.
Hayes, A. and Cribb, P. J. Effect of whey protein isolate on strength, body composition and muscle hypertrophy during resistance training. Curr Opin Clin Nutr Metab Care. 2008 Jan;11(1):40-4.
FitzGerald, R. J. and Meisel, H. Lactokinins: whey protein-derived ACE inhibitory peptides.Nahrung. 1999 Jun;43(3):165-7.
Pihlanto-Leppälä, A., et al. Angiotensin I-converting enzyme inhibitory properties of whey protein digests: concentration and characterization of active peptides. J Dairy Res. 2000 Feb;67(1):53-64.
FitzGerald, R. J., et al. Hypotensive peptides from milk proteins. J Nutr. 2004 Apr;134(4):980S-8S.
Tipton KD, Ingestion of casein and whey proteins result in muscle anabolism after resistance exercise. Med Sci Sports Exerc. 2004 Dec;36(12):2073-81.
Stephens FB, Roig M, Armstrong G, Greenhaff PL. Post-exercise ingestion of a unique, high molecular weight glucose polymer solution improves performance during a subsequent bout of cycling exercise. J Sports Sci2008 Jan 15;26(2):149-54.
Don’t Stress
Chandola, T., et al. Work stress and coronary heart disease: what are the mechanisms? Eur Heart J. 2008 Mar;29(5):640-8.
Lift Weights, Get Smart
Creer, D. J., et al. Running enhances spatial pattern separation in mice. Proc Natl Acad Sci U S A. 2010 Feb 2;107(5):2367-72.
Get a Grip:
Adams, K. J., et al. Physiological and psychological comparison between a lifting task with identical weight but different coupling factors. Journal of Strength and Conditioning Research 24(2): 307-312, 2010.
Plyo/Box Jumps Abstract:
Oxygen Consumption, Heart Rate, and Blood Lactate Responses to an Acute Bout of Plyometric Depth Jumps in College-Aged Men and Women. Brown GA, Ray MW, Abbey BM, Shaw BS, Shaw I. 1Human Performance Laboratory, HPERLS Department, University of Nebraska at Kearney, Kearney, Nebraska; 2Department of Sport, Rehabilitation and Dental Sciences, Tshwane University of Technology, Pretoria, Republic of South Africa; and 3Department of Marketing and Sport Management, Vaal University of Technology, Vanderbijlpark, Republic of South Africa.
Food Quiz
Ruales J, de Grijalva Y, Lopez-Jaramillo P, Nair BM. Int J Food Sci Nutr. 2002 Mar;53(2):143-54.
Get Your Krill
Reference/source: http://jn.nutrition.org/cgi/content/abstract/jn.109.104844v1
Myth
Lemon, P.W. “Effects of exercise on dietary protein requirements.” Int J Sport Nutr. 1998 Dec;8(4):426-47. LaBounty, P., et al. Dietary Protein intake of Resistance Trained Males. Journal of the International Society of Sports Nutrition. 2 (1):1-30, 2005. Ginty F. Dietary protein and bone health. Proc Nutr Soc 2003;62:867-76.
Stimulate Performance
Reference/source: http://www.jissn.com/content/7/1/5
Kill Your TV
Dunstan, D. W., et al. Television viewing time and mortality: the Australian Diabetes, Obesity and Lifestyle Study (AusDiab). Circulation. 2010 Jan 26;121(3):384-91.
BCAAs Kill Bodyfat
Reference: J Nutr. 2010 Jan 20. [Epub ahead of print]
Resveratrol fact
Arch Pharm Res. 2008 Jan;31(1):83-7.
Casual Carouser:
Eisenberg, M. E., et al. Casual sex and psychological health among young adults: Is having “friends with benefits” emotionally damaging? Perspectives on Sexual and Reproductive Health. 2009, 41(4):231-237.
Of Biking and Boners
J Sex Med. 2010 Jan 19. [Epub ahead of print]
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b. Goto, K., et al. Effects of resistance exercise on lipolysis during subsequent submaximal exercise. Medicine and Science in Sports and Exercise 39(2): 308-315, 2007.
c. Trapp EG,The effects of high-intensity intermittent exercise training on fat loss and fasting insulin levels of young women. Int J Obes (Lond). 2008 Apr;32(4):684-91.
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2) Cribb, P. and Hayes, A. Effects of Supplement Timing and Resistance Exercise on Skeletal Muscle Hypertrophy. Medicine & Science in Sports & Exercise. 2006. November. 28(11): 1918-1925.
3) Gray, et.al. Endocrine response to intense interval training. European Journal of Applied Physiology. 1993. 66: 366-371.
4) Burgomaster, et. al. Similar adaptations during exercise after low volume sprint interval and traditional endurance training in humans. Journal of Applied Physiology. 2008. January. 586 (1):151-160.
5) American College of Sports Medicine Position Stand on Nutrition and Athletic Performance. Journal of Exercise & Science in Sports & Medicine. 2009. March. 41 (3): 709-731.
6) Matsumoto, et. al. Journal of Nutritional Science and Vitaminology. 2009. Feb. 55(1): 52-58.
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8) Manninen, AH. Hyperinsulinaemia, hyperaminoacidaemia and post-exercise muscle anabolism: the search for the optimal recovery drink. British Journal of Sports Medicine. 2006. 40(11): 900-905.
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Call-out Study:
PHYS THER
Vol. 80, No. 6, June 2000, pp. 564-569
Abdominal Muscle Response During Curl-ups on Both Stable and Labile Surfaces Francisco J Vera-Garcia, Sylvain G Grenier and Stuart M McGill FJ Vera-Garcia, is a graduate student, Department of Morphological Science, Faculty of Medicine and Odontology, University of Valencia, 46015, Valencia, Spain SG Grenier, MA, is a doctoral student, Occupational Biomechanics and Safety Laboratories, Faculty of Applied Health Sciences, Department of Kinesiology, University of Waterloo, Waterloo, Ontario, Canada SM McGill, PhD, is Professor, Occupational Biomechanics and Safety Laboratories, Faculty of Applied Health Sciences, Department of Kinesiology, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1. (mcgill@healthy.uwaterloo.ca ). Address all correspondence to Dr McGill Background and Purpose. With the current interest in stability training for the injured low back, the use of labile (movable) surfaces, underneath the subject, to challenge the motor control system is becoming more popular. Little is known about the modulating effects of these surfaces on muscle activity. The purpose of this study was to establish the degree of modulating influence of the type of surface (whether stable or labile) on the mechanics of the abdominal wall. In this study, the amplitude of muscle activity together with the way that the muscles coactivated due to the type of surface under the subject were of interest. Subjects. Eight men (mean age=23.3 years [SD=4.3], mean height=177.6 cm [SD=3.4], mean weight=72.6 kg [SD=8.7]) volunteered to participate in the study. All subjects were in good health and reported no incidence of acute or chronic low back injury or prolonged back pain prior to this experiment. Methods. All subjects were requested to perform 4 different curl-up exercises-1 on a stable surface and the other 3 on varying labile surfaces. Electromyographic signals were recorded from 4 different abdominal sites on the right and left sides of the body and normalized to maximal voluntary contraction (MVC) amplitudes. Results. Performing curl-up exercises on labile surfaces increased abdominal muscle activity (eg, for curl-up on a stable surface, rectus abdominis muscle activity was 21% of MVC and external oblique muscle activity was 5% of MVC; for curl-up with the upper torso on a labile ball, rectus abdominis muscle activity was 35% of MVC and external oblique muscle activity was 10% of MVC). Furthermore, it appears that increases in external oblique muscle activity were larger than those of other abdominal muscles. Conclusion and Discussion. Performing curl-ups on labile surfaces changes both the level of muscle activity and the way that the muscles coactivate to stabilize the spine and the whole body. This finding suggests a much higher demand on the motor control system, which may be desirable for specific stages in a rehabilitation program.
