Just went for a yearly checkup. The doctor was pleased that I was continuing to regularly swim. He did suggest, however, "interval training".
Apparently this is something where you swim at a normal pace and then go all out for a lap or two and then back down to a normal pace. The thought is that your body/physiology gets accustomed to your usual pace and doesn't burn as many calories per hour of exercise.(especially as you lose weight).
This is a way to "trick" the body into a heightened metabolic state.
He then said a half hour of this type of training can often be as effective as a full hour of a usual workout.
Anybody heard of this or do it?
Sorry if this has been covered before.
Thanks.
AJD