Our expert says:
Mom, the best would be to make sure that his thyroid hormone levels have returned to normal before he does anything else. He can have blood taken for a thyroid function test and this will tell him whether the thyroid is still overactive or not. If everything is normal he is welcome to gym. He will also start gaining weight as soon as his thyroid hormone levels have returned to normal. Good luck.
PS. I’m sorry I took so long to answer your question, but I was sick. Actually I’m still not feeling well, but I’m trying.
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