To clarify - having had Graves Disease, no - I can't see the benefit of having TOO much hormone. However, I was VERY hyperthyroid when I was first diagnosed. I still question whether a.) these athletes are truly hypothyroid and b.) there isn't some benefit to taking small doses of synthroid, et al., as long as the hormone levels aren't too high. I have heard for years of people without thyroid problems asking their doctors for low doses of synthroid so they can lose weight. It is a metabolism booster, apparently.
Remember, those of us being treated for hyper or hypothyroidism have a medical problem. It's not just that we feel tired - that's one symptom of many of our disease. We are sick, and if our disorder is left untreated, we can suffer life-threatening issues. HYPOthyroidism causes more than just fatigue. One can have dry skin, hair loss, low tolerance to cold temps, constipation, weight gain, depression, swelling in the joints, etc. A goiter (enlarged thyroid gland) is often present - I had one. Did any of these athletes suffer from these symptoms, too? Do any have a goiter?
I find it interesting that these athletes levels only seem to dip to within the lower end of what most doctors (not this Houston Dr.) consider the normal range. These runners never seem to go off the chart low, like an autoimmune sufferer would. Also - the symptoms of thyroid problems, both hypo and hyper, can be indicative of many other medical disorders. That is why many thyroid problems go undiagnosed for months. I wonder if any runner has gone to this doctor suffering from over fatigue, and he DIDN'T diagnose him or her with hypothyroidism?
And on a side note - doesn't this Doctor look like a Who from Whoville?