Aerobics (long, steady state sub-maximal cardio) aren't much good for many health or fat loss related benefits. I've already done a post on why aerobics suck for fat loss. And then I went over the health benefits of interval training versus steady-state aerobics in my interval training for fat loss article.

Though I should admit aerobic exercise has its place. It can be a beneficial tool in getting rid of stubborn body fat in the areas males get it most (the abs) and females (butt, hips and thighs) But only if you do it on one of these two occasions (and I'll explain why as well!):

Time No. 1 You Have To Do Aerobics: After Interval Workout

To start with, let's look at what intervals and aerobics do in your body

Steady state go after heart rate cardio (aerobics). Utilizes fat for energy, but the problem is it takes a long time to exercise for the body to start making use of fat as energy for this kind of cardio.

High intensity interval training. Burns glycogen and releases fatty acids into the blood stream, but it doesn't use those fatty acids for energy, which means they get redeposited into the fat cells.

Here's how you obtain the both of best worlds:

1. Execute your 12 minutes or less of interval training

2. Hang around 5 minutes

3. Do 20 (maximum 30) minutes of steady state cardio (aerobics)

When you do it this way, the HIIT followed by 5 minutes rest guarantees a large release of fatty acids into the blood stream, which means you're guaranteed to be burning fat as fuel when you do your aerobics! Neat huh?

Time Number 2 You Must Do Aerobics: Once you're done lifting weights

Intense weight lifting is very similar to Hight Intensity Interval Training in the effects that it has on your body, the fuel it uses, etc. So the only other time you should do aerobic cardio is after your weight lifting.

I recommend 20-30 mins of low-medium intensity steady state cardio after weight lifting.

Why You Have To Know This

CNS overload: If you're lifting intensly, focusing on strength, doing low reps with heavy weights 3x per week, you're working your central nervous system to increase your strength (primarily). Interval training on your "off" days may be overload for some people, steady state aerobics after weights is a good option if that's you.

Stubborn fat: If you're already around 10-12% body fat (males) or 15-17% body fat (females) and you need to get SUPER ripped, then you must put to use the HIIT followed with aerobics in this case. It will help chuck out those last stubborn pounds.