Related Experiment Video
Updated: Aug 9, 2025

A Swimming-Induced Zebrafish Exercise Apparatus for Versatile Training Approaches
Published on: October 18, 2024
The perceived knowledge of the menstruation cycle and adjustment of swimming sets by swimming coaches based on
N Marais1, H Morris-Eyton1, N Janse van Rensburg1
1Department of Sport and Movement Studies, Faculty of Health Sciences, University of Johannesburg, South Africa.
Background:
Menstruation is the recurring discharge of the endometrial lining of the uterus as menstrual blood and tissue. The menstruation cycle affects most adolescent females and, although largely overlooked, affects women participating in sports.
Objectives:
The aim of this study was to determine whether coaches were aware of their swimmers' menstrual cycles and whether coaches considered this information when adjusting training sets.
Methods:
Within the case study, a partial mixed-method, sequential dominant status approach was used. Data were collected in the form of questionnaires, focus group discussions, and one-on-one interviews. Coaches' awareness of their female swimmers' menstrual cycles was based more on observation than communication from the swimmer.
Results:
Coaches explained that training is adjusted based on their observations, but whether this is being done correctly during the menstrual cycle requires more research. Swimmers and coaches alike seem to have minimal knowledge of menstruation, its effects on training, and how to adapt to, or overcome, those effects during training or competition.
Conclusion:
In future, this knowledge could ensure the longevity of female swimmers in the sport. Understanding whether coaches and swimmers recognise the effect of the menstrual cycle within training and competition provides a more inclusive approach to ensure athlete longevity after puberty. This approach is grounded in creating an understanding between the swimmer and coach about the effect of menstruation during training and competition. It ensures an extended and more successful participation which may also assist in dealing with the 'taboo' surrounding menstruation and the female athlete.
Related Concept Videos
The Menstrual Cycle
The menstrual phase occurs from days 1 to 5 and involves the shedding of the stratum functionalis, as a...
Hormonal Regulation of the Menstrual Cycle
At puberty, GnRH begins a pulsatile release pattern, which triggers the anterior pituitary gland to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH). The frequency and amplitude of GnRH pulses vary across the menstrual cycle, with faster pulses favoring LH release and slower pulses favoring FSH...
Menses Phase
When fertilization does not occur, the corpus luteum deteriorates, causing a significant drop in the levels of estrogen and progesterone in the body. This hormonal decrease triggers the release of prostaglandins, which cause the uterine...
Secretory Phase
Following ovulation, the corpus luteum, a temporary endocrine structure, produces progesterone and estrogens. These hormones stimulate the growth and coiling of endometrial...
Birth Control Methods
Hormonal Control of the Ovarian Cycle
Before puberty, the hypothalamus releases GnRH in a low frequency, low amplitude pulsatile manner. This along with the immature hypothalamic-pituitary-gonadal axis activity, results in low estrogen levels and the absence of a fully functional ovarian cycle. At puberty, GnRH secretion increases in both frequency and...

