The temporary weight gain explained:
When someone starts a new exercise program, they often experience
muscle soreness. The more intense and "unfamiliar" the program, the more
intense the muscle soreness. This soreness is most prevalent 24 to 48
hours after each workout.
In the first few weeks of a new program, soreness is the body trying to
"protect and defend" the effected or targeted tissue. Exercise
physiologists refer to this as delayed-onset muscle soreness, or DOMS.
type of soreness is thought to be caused by tissue breakdown or
microscopic tears in muscle tissue. When this happens, the body protects
the tissue. The muscle becomes inflamed and slightly swollen due to
fluid retention. This temporary retention of fluid can result in a 3- to
4-pound weight gain within a few weeks of a new program. Keep in mind
that muscle soreness is not necessarily a reflection of how hard you
worked. In fact, some people feel no signs of muscle soreness, yet will
experience the muscle protection mechanisms of water retention and