by knoted on Thu Nov 05, 2009 4:38 pm
I'd suggest that if you can do two sets of Tabata style intervals, of any exercise, let alone three, you aren't doing it properly. You should be barely able to walk, about to pass out and throw up all while feeling as if your lungs are about to explode. Intervals are hard, very hard. You will be sore for days. A persons whose sole goal from cardio is fat loss, should do steady state training.
Low to medium intensity exercise should be part of every single persons weekly routine. This will provide many benefits like lower heart rate and blood pressure and increased VO2 max, as well as burning a few calories. This type of training is something that can easily be added to a weight training program without taking away from progress on the main lifts, which is the point. You can do light to medium intensity steady state after a weights session, and you can do it on your off days without too many problems. As always, progression applies. If you are 30+ and haven't done any exercise since high school, start off with 20 minutes fast walking, and slowly work your way up.
HIIT burns three fifths of fuck all more total calories than steady state, even counting post exercise. What intervals will do, is increase VO2 max in less training time than steady state, as well as providing massive benefits to your anaerobic threshold. Mind you, neither help fat loss. A 30 min run at 12 km / hr will be around 500 calories. Doing 30 minutes of 1 min on 1 min off intervals for 30 min will be around 550 calories. Big deal. You could just not eat that muffin and not exercise at all, for the same net benefit to fat loss.
Taking running as an example, as that is something I'm familiar with, I would not have someone do intervals until they can do a comfortable 25 min 5 km. It is very easy to start dreading intervals if you do them too often (like any more than twice a week), and then just pay off the whole exercise thing completely, or do them half heartedly, which is basically just medium intensity steady state any way. The benefits just can't outweigh the disadvantages until a person has decent enough recovery that they don't feel shattered for the next 48 hours. If you are lifting heavy weights 3 times a week, I would recommend doing no more than a single interval session.
To directly answer you Nick, if you can't do cardio training straight after weights because you're stuffed, it's not that big a deal. Do some light to medium intensity training, say twice a week on your off days building up over the weeks. Pick whatever you like, ride your bike, go for a fast walk / slow run, doesn't matter. Slow and steady is the name of the game. Just remember though "You can't out train a bad diet". Meaning, you aint going to lose fat with an excess of calories, and it's much easier and more effective to address the input side of the equation.
As far as mixed signals, or maintaining muscle, I have never found any evidence that suggests either steady state or interval training will directly reduce muscle mass. As long as you aren't over training in general anyway. Happy to be proved wrong though.
People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf.183 cm, 83 kg
5 Lift Total 447.5 kg, Oct 09
Goal 600 kg, July '10
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