Oestrogen and Progesterone levels during the menstrual cycle needs to be considered when training for endurance events.

Oestrogen and Progesterone levels during the menstrual cycle needs to be considered when training for endurance events.

  • Some injuries appear to occur more often during particular parts of a female monthly cycle.
  • Studies have shown that the difference in monthly hormones can For example a female will get an injury on average during the ovulatory phase of your monthly cycle and experience fewer injuries during the follicular phase. Scientific studies in the changes of monthly hormones can result in knee ligament injuries and hip injuries in women. 
  • either reduce or increase the chance of your injuries during each monthly cycle. 
  • Studies have shown that during the mid-luteal phase of your monthly period has a negative effect during endurance training and competitions. 
  • Some studies have proven that females who had been consistent with her training (more than 5 months) had no decline in their respiration ability during their monthly cycle. 
  • I have read hundreds of scientific studies on the female menstrual cycle and found the ones below to be of particular interest. 
  • In summary from my observations.
  • During prolonged exercise your performance may or may not be affected. The majority of studies I have looked at show that oxygen consumption heart rate perceived exertion rates are not affected by the menstrual cycle, some studies do prove that cardiovascular strain is greater during the mid-luteal phase. 

Higher injury risk each month.
http://journals.sagepub.com/doi/abs/10.1177/03635465980260050301

Muscle performance can change during your monthly cycle. Performance appeared to be greater during the menstrual phase. 
http://europepmc.org/abstract/med/1806730

Exercise weight loss and monthly periods
http://www.nejm.org/doi/full/10.1056/NEJM198505233122103

The effects of the menstrual cycle on your exercise performance. 
https://link.springer.com/article/10.2165/00007256-200333110-00004

Menstrual cycle study an affect respiration on athletic performance and non-athletic women 
http://europepmc.org/abstract/med/7263392

Phases of the Menstrual monthly cycle starts on the first day of menstruation. It is assumed that a monthly cycle lasts 28 days, but the length may vary but will have four phases listed below. 

Menstrual phase from 1 to 5 days 

  • · The uterus sheds its inner lining of soft tissue and blood vessels which exits the body from the vagina in the form of menstrual fluid.
  • · Blood loss of 10 ml to 80 ml is considered normal.
  • · You may experience abdominal cramps. These cramps are caused by the contraction of the uterine and the abdominal muscles to expel the menstrual fluid.

Follicular Phase lasts 1 to 13 days 

  • · The pituitary gland secretes a hormone that stimulates the egg cells in the ovaries to grow.
  • · One of these egg cells begins to mature in a sac-like-structure called follicle. It takes 13 days for the egg cell to reach maturity.
  • · While the egg cell matures, its follicle secretes a hormone that stimulates the uterus to develop a lining of blood vessels and soft tissue called endometrium.

Ovulation phase starts on day14 
On the 14th day of the cycle, the pituitary gland secretes a hormone that causes the ovary to release the matured egg cell.
Luteal phase starts from day 15 to day 28 (lasts till the end of the monthly cycle) 

  • · The egg cell released during the ovulation phase stays in the fallopian tube for 24 hours.
  • · If a sperm cell does not impregnate the egg cell within that time, the egg cell disintegrates.
  • · The hormone that causes the uterus to retain its endometrium gets used up by the end of the menstrual cycle. This causes the menstrual phase of the next cycle to begin.

More useful links http://www.ironmate.co.uk/female-hormone-levels-how-they-affect-sporting...

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