Why should a good warm-up include stretching and activity-specific warm-up actions?

One of the points of performing warm-up exercises is to prevent injury and muscle strain. The best way to ensure that these events do not occur is to warm up the muscles that are going to be used in the exercise regimen.

Explanation:

a mother eats twice as much to support her growing fetus

limiting sugar intake in a mother with gestational diabetes, switching from diving to swimming.   depending on whether the patient is normal weight, over weight or gain will differ depending on that.