Your baby has a good sense of smell from the start. She gets to know your scent on Day 1 and probably recognizes the scent of other people in her life within about a week. Babies are especially sensitive to the smell of breast milk and can even distinguish it from formula , says Dr. Tapas.
As an intermediate pathway between the phosphagen and aerobic system, anaerobic glycolysis can produce ATP quite rapidly for use during activities requiring large bursts of energy over somewhat longer periods of time (30 seconds to three minutes max, or during endurance activities prior to steady state being achieved).
Aerobic and anaerobic refer to the source of energy being used by your muscles during the activity. In the case of anaerobic -- the absence of oxygen -- the main energy source is phosphocreatine and glycogen. Aerobic actually means requiring oxygen. Any exercise performed steadily for longer than roughly 2.5 minutes switches into the aerobic phase -- the oxidation phase.