Muscle Repair. The process of muscle repair depends on the availability of amino acids, and understanding the sequence of events can help clarify why dietary protein is necessary. Whatever the degree of injury to your muscle, trauma to the fibers begins a series of actions to rebuild the damaged tissue.
Typically, babies begin sitting up between 4 and 7 months, Dr. Pitner says. You can help your cutie learn this skill by holding on to her arms when she's on her back and gently pulling her up to a sitting position. She'll enjoy the back-and-forth motion, so add some fun sound effects to make it even more exciting.
Susie Alessi's son was also around 6 months when he began to sit up by himself. We did tummy time and 'baby pushups' where I would lay him across my legs and make him lift up or push up off of the floor with his hands, she says. That kind of practice is very important in helping babies reach milestones like sitting.