HOME >> MEDICINE >> NEWS
Energy balance, not exercise, key to athletic menstrual disturbance

University Park, Pa. - Female athletes often lose their menstrual cycle when training strenuously, but researchers have long speculated on whether this infertility was due to low body fat, low weight or exercise itself. Now, researchers have shown that the cause of athletic amenorrhea is more likely a negative energy balance caused by increasing exercise without increasing food intake.

"A growing proportion of women are susceptible to losing their menstrual cycle when exercising strenuously," says Dr. Nancy I. Williams, assistant professor of kineseology and physiology at Penn State. "If women go six to 12 months without having a menstrual cycle, they could show bone loss. Bone densities in some long distance runners who have gone for a prolonged time period without having normal menstrual cycles can be very low."

In studies done with monkeys, which show menstrual cyclicity much like women, researchers showed that low energy availability associated with strenuous exercise training plays an important role in causing exercise-induced amenorrhea. These researchers, working at the University of Pittsburgh, published findings in the Journal of Clinical Endocrinology and Metabolism showing that exercise-induced amenorrhea was reversible in the monkeys by increasing food intake while the monkeys still exercised.

Williams worked with Judy L. Cameron, associate professor of psychiatry and cell biology and physiology at the University of Pittsburgh. Dana L. Helmreich and David B. Parfitt, then graduate students, and Anne Caston-Balderrama, at that time a post-doctoral fellow at the University of Pittsburgh, were also part of the research team. The researchers decided to look at an animal model to understand the causes of exercise-induced amenorrhea because it is difficult to closely control factors, such as eating habits and exercise, when studying humans. They chose cynomolgus monkeys because, like humans, they have a menstrual cycle of 28 days, o
'"/>

Contact: A'ndrea Elyse Messer
aem1@psu.edu
814-865-9481
Penn State
12-Feb-2002


Page: 1 2 3

Related medicine news :

1. Energy and sports drinks attack enamel
2. Department of Energy announces new agreement with USC, national labs and private company
3. Energy blocker kills big tumors in rats
4. Energy density labels do not encourage overeating
5. Energy blocker may be potential liver cancer treatment
6. Energy expenditure differs by race, sex, and weight among Louisiana school children
7. Story tips from the Department of Energys Oak Ridge National Laboratory, October 2000
8. Energy Secretary Bill Richardson to make major cancer treatment annoucement in Pittsburgh area
9. Energy Density -- Not Fat -- Is Key To Feeling Full While Managing Weight
10. Products For Weight Loss Or Increased Energy Can Be Deadly, Warn Poison Control Experts
11. Diet, exercise, stimulating environment helps old dogs learn

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:5/26/2020)... ... ... Sex educator, activist, humanitarian, and Wicked Pictures star jessica drake ... AASECT Audio Visual Award for jessica drake's Guide to Wicked Sex: Senior Sex. The ... non-actors in its demonstrations and narratives and was produced and distributed by Wicked Pictures. ...
(Date:5/21/2020)... , ... May 21, 2020 ... ... Companion to the CRC’s Guide to Coordinating Clinical Research, CenterWatch eLearning , ... research management, The CRC Trainer: An Interactive Companion to the CRC’s Guide ...
(Date:5/21/2020)... Pa. (PRWEB) , ... May 21, 2020 , ... ... Inc. and an industry leader in cancer biomarker assays, announced today that Cigna ... list. Cigna Corporation is a global health service company dedicated to improving the ...
(Date:5/21/2020)... ... May 21, 2020 , ... Friends of Lisa Campbell, announce that Lisa Campbell, ... Planned Parenthood Southeast Advocates (PPSEA). PPSEA educates and lobbies on behalf of ... range of reproductive health care. PPSEA educates and lobbies on behalf of women’s health ...
(Date:5/21/2020)... ... 2020 , ... The Rise of Mental Health and Substance Abuse During COVID-19, ... adjustments, needless to say, more complications. With rising deaths, more confirmed cases every day, ... be hard to escape and find peace. Adding to these persistent stressors are quarantine ...
Breaking Medicine News(10 mins):
(Date:5/27/2020)... ... May 27, 2020 , ... NDA Partners Chairman Carl ... with more than 25 years of experience in product design, development, and manufacturing ... Consultant. His expertise includes quality assurance, including ISO 13485 and FDA QSR (21 ...
(Date:5/26/2020)... ... May 26, 2020 , ... SignatureCare Emergency Center, your friendly neighborhood ... . , The new ER is set to open early June, 2020, and will ... 21315 N SH 130, Bldg.4, Pflugerville, TX. , According to Dr. Aaron Braun ...
(Date:5/25/2020)... ... ... Federal data has already confirmed that most of the deadly victims of COVID-19 in ... that many of those who have died from the virus were also denied tests. ... an artist that calls himself The Undiscovered Artist brings light to this matter in ...
Breaking Medicine Technology:
Cached News: