SPORTS MEDICINE : RESEARCH : WOMEN: Are Fewer Women in Exercise Studies Because of Their Periods?
David P. Dillard
SPORTS MEDICINE :
Are Fewer Women in Exercise Studies Because of Their Periods?
By Cari Nierenberg
June 6, 2016 06:55pm ET
Women are underrepresented in exercise and sports medicine research when compared to men, a new editorial suggests.
One reason may be that women's periods throw things off for exercise researchers: "The complexities of the menstrual cycle are considered major barriers to [women's] inclusion in clinical trials," the authors of the editorial, who are experts in Europe and the United States, wrote in their article, published online today (June 6) in the British Journal of Sports Medicine.
Research on how the menstrual cycle may affect women's exercise training and performance is lacking, said Georgie Bruinvels, a doctoral student in the division of surgery and interventional science at University College London and the lead author of the editorial.
When research is conducted on women who exercise, it is often limited. For example, women are often only tested when they are at a specific phase of the menstrual cycle, typically when hormone levels are low, Bruinvels said. Or, studies may include only women who take birth control pills, and some researchers just completely ignore the possible impact of the menstrual cycle on female study participants in their analysis, she explained.
"Women athletes have to compete at all phases of their menstrual cycles, yet currently only a snapshot of time is being researched," Bruinvels told Live Science. More studies are needed to evaluate how the cyclical variations in female reproductive hormones may impact physiological processes and women's athletic performance, she said.
For example, women who are ovulating have high levels of estrogen, and this may mean their strength levels are different than they are during the luteal phase of the menstrual cycle, when they have high levels of both estrogen and progesterone, Bruinvels said.
An earlier study also found a gender gap in sports medicine research. In that study, researchers looked at exercise studies published in three major sports medicine journals between 2011 and 2013, and found that 39 percent of all of the participants were women, and 61 percent were men, according to the findings published in the European Journal of Sport Science in 2014.
The reasons for this gender gap are unclear. Historically, all types of medical research including drug trials were once exclusively done on men because of concerns over potential damage to a woman's reproductive health, Bruinvels said.
The complete article may be read at the URL above.
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