I'm not hypothyroid, but just posting an opinion so you get some traffic in your thread.

I keep my fat intake constant (in grams not %) whether bulking or cutting, and my protein intake constant as well, except I eat slightly more protein during a cut.

What I vary is carbs based on how much "room" I have left. If my metabolism were lower I would have less space for carbs.

I see this post is many years old but wanted to write about my experience anyway. I was diagnosed 15 years ago with hypothyroidism. I have spent years on 1100-1200 calories a day. I trained and ran the Chicago Marathon 2 years ago in desperation to lose weight.
Had a knee injury and hip issues so I have given up running. The weight started coming on fast, no matter that I was doing 1-2 hours at the gym 5x a week and eating 1200 calories. My yearly visits to the doctor are always annoying. I complain about being tired and how that symptom and others has never went away for me. The reply is always the same, shoulder shrug "your labs look fine."
In august this year I wanted to try something different. Obviously what I was doing for diet and exercise wasn't working. I found Jessie Hilgenberg and signed up to be a Jessie's girl. I received specific nutritional instructions and specific weight training and cardio workouts. I have been lifting weights on and off for 4 years.Been doing cardio, yoga, and pilates for years.
1. Transforming as we speak and it is amazing!!
2. I weight lift 6 days a week for around an hour each session. I have 2 leg days, 2 back days, 1 arm and shoulder day each. I do 3-4 cardio days at 20 minutes each. 1-2 steady state and 2 HIIT.
3. Nutrition!!! This is the most important part. Especially for hypothyroid individuals! Following Jessie's recommendations I bumped my calorie intake to 1700 calories a day!! I started at protein- 175g, carbs- 175g, fats-72g. Sugar less than 30/day. Fiber 25-30g/day. This calculation is available on Bodybuilding.com. I started 2nd phase this week and dropped carbs to 139g. I eat lean meats, fruit, veg, brown rice, whole wheat tortillas, protein shakes, and if I want a treat I add it in to my macros. This is flexible dieting. It works!! I haven't tried Paleo because I want to eat in a way that I can and want to stick with. I have cut down my gluten intake and that has been a game changer!

I can not believe the difference this exercise and nutritional plan has changed my life in such a short time. This is my 6th week of being a Jessie's girl and I have lost several inches and muscles are coming out every where!! I no longer experience brain fog, joint pain, extreme lethargic episodes, constant tiredness always seeking naps. I wasn't eating enough to give my body the nutrition it needed to function. The most frustrating part is everyone says low calorie more cardio. That does not work for hypothyroid, at least for me. It only made me more exhausted and I couldn't understand why. I have become obsessed with this topic, especially when I think back to my last doctor appointment when I complained once again about how tired I was. I received a phone call from the office nurse notifying me that my labs show I am pre-diabetic. I have a strong family history, 39 years old, and hypothyroid. I have been pre-diabetic for years. I was irritated because she then said, "Doctor wants you to eat healthy and exercise." I was so mad my blood was boiling at this ignorant comment. How the heck was I suppose eat healthier and workout more than I already was?? I know now the solution to my hypothyroid problems. I am so upset that healthcare professionals do not take the time to ask the appropriate questions to find out what is really going on. Now in my 6th week and enjoying weightlifting, I have been searching the subject on weight training and hypothyroid. Crickets! I can hardly find anything on it, especially for women. I am sorry for the long answer and rant, I just want others to look at their own calorie intake and workout routine. If your body is not getting enough calories it will hold on to fat! I can't believe how many calories I am eating and losing weight and felt better mentally and physically in the 1st week of being a Jessie's girl.

I'm just beginning to learn about weight training and hypothyroid. I'm so excited to try this new approach.
Dr Tyna Moore talks about weight training and thyroid. I encourage everyone to listen to her talks. I am amazed that this information has never been presented to me before. I've had years of struggle from the wrong information.

I have recently been diagnosed with hypothyroidism in January of this year. I too am frustrated because of the medication (levothyroxine 25mg) i have been put on. I have been non stop in the gym for almost 5 years now. I have been eating clean pretty much 90% of this time. I know how to work on my diet and tighten it up when it is needed. Before being diagnosed i had been doing IF 16/8 for 3 months and was cutting the few pounds i had wanted off, felt like my metabolism was rocking it. I didnt really feel bad and was pumped to have my body fat down and the cuts I was showing. Then the "Dr's appointment", labs were all perfect, I am 54 and before this visit I was not on any medication at all. Since then I have slowly added 5 to 6 pounds and it seems to creep up daily. I haven't change my diet or rate of workouts, this is frustrating to say the least. I'm discouraged and at a loss. I am in the gym 6 to 7 days a week weightlifting and 4 days of added cardio, I work hard to maintain a certain look and this is frustrating. I have more labs this week to check my medication to see if this is helping it any. I also have a call into my doctor about the weight gain. I have researched the medication and of course this is one on the biggest complaints about it, putting on weight!!