When it comes to scientific data regarding hypothyroidism and exercise more research is warranted, however there are specific actions one can take while going through steps to heal the thyroid. One common experience that patients have is decreased exercise tolerance, they often report that they cannot generate the cardiovascular power they use to.:
Some data suggests that the exercise capacity and endurance is compromised in a hypothyroid state because of impaired blood flow during high oxidative states, changes in energy metabolism, as well as suboptimal cardiac function. Exercises that cause you to train at higher intensities can suppress thyroid function for 24 hours specifically T3.
There is a decrease of T3 availability in the body at higher intensities (>70 % intensity) of training, for example sprint intervals.
Thyroid hormones also influence tendon homeostasis. What this means is that low levels of thyroid affect the cells that make tendons strong as well as enhance collagen production. When the thyroid is impaired, individuals are at risk for tendon injuries, keep explosive movements and exercises that require high skill movements to a minimum.
If you have an underactive thyroid it is important during recovery to keep training modalities to under 70% of max heart rate. In addition, consider planning your meals around training as fasting further suppresses thyroid hormones.
Eating every 4 hours helps keep cortisol levels low by protecting the body from perceived starvation.
One way to keep excess cortisol levels down is to eat every four hours to protect the body from perceived starvation.
Wondering what to eat? You can follow along with my nutrition recommendations in the You Nourish You Recipe Book of Thyroid Yoga-Approved Recipes, featuring breakfast, lunch, dinner, dessert, and protein smoothies from nutrition experts including Dana James, Nikki Sharp, Kristin Dahl, and Parsley Health Founder Robin Berzin M.D.