any hikers with an underactive thyroid? has it been more difficult hiking than when you hiked before you were diagnosed? even if you're in good shape? and can you still hike the same miles per day that you used to before you developed symptoms? can you still do 15 miles a day if you DO anywhere around 15? i'm still in good shape, but my symptoms somewhat slow me down. and someone tell me how to make my thread in bold, it won't let me.