“There are four reliable ways to stimulate the maximum caloric burn both during and after the exercise session,” says Teta. “We call these the ‘Bs’ and the ‘Hs’, breathless, burning, heavy and heat. Each workout should work to generate all four of these components.”
In other words, when you finish your circuit you should be wobbly, sweating, striving to catch your breath, and clawing for your water bottle. Your muscles should be fatigued, and if you’re just starting out, you can probably expect a few days of soreness.
CLIPPED AND QUOTED from a fitness website.
Guys, You know I have been working out forever.
I thought I worked out hard.
I was wrong.
If you get the opportunity, do circuits.
I can't even tell you the difference it's made in such a short amount of time.
I can FEEL muscles developing in my legs and in my rear.
Heck....I even have an 'in curve' above my rear end...something I have never had before..
I have always had 'flat butt' syndrome.
Here is a good example...
It makes my hour long elliptical workouts look like pansy stuff.
My elliptical days are now my 'easy' days.
So...If you are dead bored by your current workouts...try incorporating circuits.
They are fun and will really push you like you wouldn't believe.