We've got a new comprehensive paper that describes the changes in thyroid function in conditions of strain (exercise, adaptation to cold, pregnancy) and nonthyroidal illness. It's meant to give a comprehensive overarching picture of thyroid function in many conditions so as to make a complete picture. Bit heavy going but some here might feel it worthwhile to read. Its in open format:
Front. Endocrinol., 20 July 2017 | doi.org/10.3389/fendo.2017....
Thyroid Allostasis–Adaptive Responses of Thyrotropic Feedback Control to Conditions of Strain, Stress, and Developmental Programming