http://www.ncbi.nlm.nih.gov/pubmed/15233550 copy
Effects of whole-body vibration exercise on the endocrine system of healthy men.Di Loreto C, Ranchelli A, Lucidi P, Murdolo G, Parlanti N, De Cicco A, Tsarpela O, Annino G, Bosco C, Santeusanio F, Bolli GB, De Feo P.
Department of Internal Medicine, Section of Internal Medicine and Endocrine and Metabolic Sciences (IMISEM), University of Perugia, Perugia, Italy.
Whole-body vibration is reported to increase muscle performance, bone mineral density and stimulate the secretion of lipolytic and protein anabolic hormones, such as GH and testosterone, that might be used for the treatment of obesity. To date, as no controlled trial has examined the effects of vibration exercise on the human endocrine system, we performed a randomized controlled study, to establish whether the circulating concentrations of glucose and hormones (insulin, glucagon, cortisol, epinephrine, norepinephrine, GH, IGF-1, free and total testosterone) are affected by vibration in 10 healthy men [age 39 +/- 3, body mass index (BMI) of 23.5 +/- 0.5 kg/m2, mean +/- SEM]. Volunteers were studied on two occasions before and after standing for 25 min on a ground plate in the absence (control) or in the presence (vibration) of 30 Hz whole body vibration. Vibration slightly reduced plasma glucose (30 min: vibration 4.59 +/- 0.21, control 4.74 +/- 0.22 mM, p=0.049) and increased plasma norepinephrine concentrations (60 min: vibration 1.29 +/- 0.18, control 1.01 +/- 0.07 nM, p=0.038), but did not change the circulating concentrations of other hormones. These results demonstrate that vibration exercise transiently reduces plasma glucose, possibly by increasing glucose utilization by contracting muscles. Since hormonal responses, with the exception of norepinephrine, are not affected by acute vibration exposure, this type of exercise is not expected to reduce fat mass in obese subjects.
PMID: 15233550 [PubMed - indexed for MEDLINE]
Supplement from 03/06/2008 11:37pm:
http://www.kines.umich.edu/research/cxr/eel.html copy
more at the above link. includind case study research.
Dr. Katarina Borer
1220 CCRB
401 Washtenaw Ave.
Ann Arbor, MI 48109-2214
Phone: (734) 647-2706
Dr. Borer's personal web site (leaving Kinesiology site)
Research Overview
The Exercise Endocrinology Laboratory offers laboratory and clinical experiences to students interested in the interactions of exercise and nutrition and on the effects of exercise on energy regulation and hormone secretion in humans.
Experiences are driven by basic questions, but the work involves working with human subjects and dealing with the applications of theory to practice. Experiences can include interactions with study subjects, assessment of their dietary intake, aerobic fitness, and energy expenditure, entry of data into databases, working with blood samples and doing metabolite and hormone assays. Dr. Katarina Borer studies effects of acute exercise on hormones and metabolism. She also has studied the effects of endurance exercise training on animal growth and human growth hormone secretion, as well as on energy regulation and fat loss. She investigates the effects of exercise on body mass and energy regulation through studies of the roles of nutrition and hormones in these phenomena.
In her earlier studies, Borer used golden hamsters because they voluntarily run marathon distances each night. In her present studies, she studies post-menopausal women because they are at risk of developing obesity, diabetes, and coronary heart disease, and have low levels of growth hormone.
Her training studies have explored whether exercise in the form of walking when carried out at different intensities can affect insulin sensitivity (and risk of developing diabetes), growth hormone secretion (and maintenance of lean body mass and control of abdominal fat), body fat level and regional distribution, and several risk factors for developing coronary heart disease (hypertension and blood clotting factors).
Articles on Dr. Borer's research
