It seems that muscles and fat have accumulated around my shoulders and back, causing my arm's range of motion to become limited. While having a larger upper body is beneficial, now when I sleep and lie on my side, my shoulders hurt. Perhaps it's due to increased pressure and weight...
Unbeknownst to me, the thickness of my arms has significantly increased. However, with a significant increase in body fat, I am once again increasing the proportion of cardiovascular exercise. I must challenge myself to reach 15% again!