Due to the secretion of cortisol in long-term stress, fat tends to accumulate around the abdomen and back. The fat is stored in anticipation of the coming famine.
This is due to the stress signal of the basic survival of the human species response. Never mind that your stress is due to a heavy workload and a power-hungry, driven personality.
Your body’s reaction to stress is the same as primitive man’s who was constantly involved in a fight for survival. Fat storage was, and still is, great for survival during famines.