JJ Virgin explains how thyroid hormones T3 and T4 control energy use, muscle protein synthesis, and recovery. Without proper thyroid function, you get fatigue and weak muscles that won't grow, no matter how hard you train.
You probably think hormones using testosterone, but you got to make sure that your thyroid is working optimally because thyroid hormones, like we're talking T3, T4, are important for controlling how your body uses energy, including building and breaking down muscle proteins. Having your thyroid just right is key to keeping your muscles strong and healthy. These hormones have a big say in how your body burns energy and uses nutrients, which directly affects how your muscles grow and mend. Bottom line is when your thyroid isn't doing its job properly, like if you've got hypothyroidism, you might feel weak, tired and have trouble making new muscle. So keeping your thyroid hormones in check is critical for making the most of your muscle building efforts.
