The thyroid is considered the “controller” of metabolism function from a cellular level. Metabolism can be thought of as the rate of energy production in the cell and the speed at which all processes happen in the body.
One way to assess thyroid function is by tracking basal body temp. This can be done under the tongue or armpit. You should do this this upon waking first thing and after your first meal. You can continue to do so before/after workouts which can give you clarity into how you’re responding to your training as well.
➡️Offers insight into your thyroid health
➡️Can indicate if ovulation has happened
➡️Provides insight to how well your body is using the energy you give it (Your body is like a thermostat; it produces heat when it can properly utilize your food for energy🔥)
➡️Provides insight to how well you are recovering from training
Low body temperatures are indicative of low thyroid function, possible inflammation, suppressed immune function, digestive problems, high stress, and estrogen dominance.
A warm body is linked with better immune function, good thyroid function, reduced inflammation, fertility, good elimination of toxins, and efficient and effective digestion.
Ideally, your temperature should sit between in Follicular phase is 97.2-97.8 F, Optimal average BBT second half: 98.4 F, with it being lowest in the morning and increasing after each meal and as your day continues.
➡️Indicates how well your body & tissues are taking in nutrients and oxygen
➡️Shows the rate at which your body and your body’s tissues are capable of using and taking in nutrients and oxygen
An optimal resting pulse rate sits between 75-90 beats per minute.
This information goes directly against what we are taught in the fitness industry! I love this post from a colleague that discusses it more!
Using both temperature and pulse can show you a bigger picture.
If you have: a higher temperature and higher pulse OR a normal temperature and higher pulse → you’re likely actively stressed.
If you have: a lower temperature and lower pulse OR a normal temperature and lower pulse → you’re likely chronically stressed and experiencing some kind of metabolic suppression.
When temperature is consistently below 97.8 that indicates hypofunction of thyroid.
These tests aren’t 100% accurate, other things affect them. Use them alongside the other markers mentioned above ( aka do not look at them in isolation) to give you insight into your current metabolic state and what you need to improve.
To read more about the doctor that pioneered these tests grab a book called Hypothyroidism: The Unsuspected Illness – by Dr Broda Barnes.