Girls only - tons of missed periods?

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  • WendyTerry420
    WendyTerry420 Posts: 13,274 Member
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    Who cares who the advice comes from whether its a male or female.

    Anyway, low energy availability is usually the cause. I only read Sunday's and Monday's entries but noticed this:

    Sunday: Ate 1639 Exercised 1171 = 468 net
    Monday (planned): Ate 1117 Exercised 508 = 609 net

    That's pretty low energy availability if you ask me.

    Read this study about calorie restriction affecting LH pulsatility and ovarian disruption and do the math using the included formulas to see if you are perhaps crossing the threshold:

    http://jcem.endojournals.org/content/88/1/297.full

    I did the math for you below:

    Weight: 158
    Body fat %: I estimated you at 29%, thus, you have a lean body mass of 112 lbs (51 kg).
    TDEE: I'll state 2100 although many calculators put you at 2270.

    30 cal x LBM kg ( 51 kg) x 1 = 1530 calories eaten
    15 cal x LBM kg (51 kg) x 1 = 765 exercise calories

    Thus, 2100 - 1530 = 570 calorie deficit
    570 + 765 = 1335 total deficit
    2100 - 1335 = 765 calorie net threshold

    According to both Sunday and Monday, your nets have been 468 and 609 calories, which are below the projected threshold of 765 calories. The above study mentioned that disruption didn't occur at said threshold, but going below at some point will.

    Thus, if your actual TDEE is really about 2100 calories and you are 29% bf and you established a net lower than 765 calories over 5 consecutive days, then you risk disruption of ovarian function and LH pulsatitlity.

    ^^^^

    Great advice. I recently experienced an early period, but the last time I missed one completely was several years ago when we were in real bad shape financially and I was stressed out and definitely malnourished/under-eating from the lack of money to buy food. Other than that, I haven't missed one other than during pregnancy.
  • donnajean84
    donnajean84 Posts: 4
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    Missing periods like that can be a sign of a hormonal imbalance. It would be wise for you to go and see your OB/GYN and talk with them about what all you have been experiencing and have some blood work done. I took birth control for a while to manage severe cramping and when I stopped taking it I stopped having a period. I had blood work done and discovered that I have PCOS. It might be nothing, but it might be something, and if it is a hormonal imbalance it could make it harder for you to lose weight.
  • 777Gemma888
    777Gemma888 Posts: 9,578 Member
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    Who cares who the advice comes from whether its a male or female.

    Anyway, low energy availability is usually the cause. I only read Sunday's and Monday's entries but noticed this:

    Sunday: Ate 1639 Exercised 1171 = 468 net
    Monday (planned): Ate 1117 Exercised 508 = 609 net

    That's pretty low energy availability if you ask me.

    Read this study about calorie restriction affecting LH pulsatility and ovarian disruption and do the math using the included formulas to see if you are perhaps crossing the threshold:

    http://jcem.endojournals.org/content/88/1/297.full

    I did the math for you below:

    Weight: 158
    Body fat %: I estimated you at 29%, thus, you have a lean body mass of 112 lbs (51 kg).
    TDEE: I'll state 2100 although many calculators put you at 2270.

    30 cal x LBM kg ( 51 kg) x 1 = 1530 calories eaten
    15 cal x LBM kg (51 kg) x 1 = 765 exercise calories

    Thus, 2100 - 1530 = 570 calorie deficit
    570 + 765 = 1335 total deficit
    2100 - 1335 = 765 calorie net threshold

    According to both Sunday and Monday, your nets have been 468 and 609 calories, which are below the projected threshold of 765 calories. The above study mentioned that disruption didn't occur at said threshold, but going below at some point will.

    Thus, if your actual TDEE is really about 2100 calories and you are 29% bf and you established a net lower than 765 calories over 5 consecutive days, then you risk disruption of ovarian function and LH pulsatitlity.

    Loved the read. And from a man.

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