Hi Ann! Love the BLOG and love your new book. Can you explain why there is an increase in body weight when the muscles are sore following an intense workout?
A person's total body mass is a combination of muscle, fat, bone, the brain and neural tract, connective tissue, blood, lymph, intestinal gas, urine, and the air that we carry in our lungs. Immediately after a workout routine, the percentage of mass in each of these categories can shift as much as 15 percent. Intense workouts cause variability on the scale due to factors like hydration status, inflammation from muscle damage repair (we call this delayed onset muscle soreness), even the amount of intestinal by-product or urine and blood volume. The slight weight gain at the start of an exercise program can also be from glycogen and extra water to protect and repair the micro-damage you're doing to your muscles. This isn't something to stress over since this type of weight fluctuation is temporary.