I've got several versions of the Atkins book, but haven't read the TNT book, so can only comment on Atkins.
Atkins actually understresses the importance of both aerobic exercise as well as resistance training in his last book and says you aren't really following his plan if you don't exercise. But he then goes on to admit that while he loves tennis, he hates resistance training and then tells you that fortunately you can already get benefits from doing just 1 single exercise per machine.
And actually for someone who's just looking for muscle retention and is quite fat to begin with, that may be just enough. I'm not saying it's a great way to do resistance training but if you really loathe lifting weights it's a way to do it. This is actually true for a majority of people, including one of my best friends who could run a marathon in a heart beat but flat out refused to do that boooooring stuff,
On the food: there's less emphasis on what kind of fats. As for heart health, recent resxearch shows there's NO difference whatsoever in cardiovascular risk between eating a lot of mono-/poly-unsaturates or saturated fats. The difference is that the mono/poly fats will result in a slightly higher metabolic rate, esp. fish oil.
And yes.. there's far too much emphasis on the benefits of ketosis and it makes people think they can stay in phase 1 forever until they are slim again. And the reason they aren't on target wt yet is due to eating too many carbs. While it is mostly just due to eating too many calories, period.
You won't believe how many recipes there are on Atkins forums that involve desserts and (fake)pastries and how few meat/fish/chicken etc. recipes there are. Most of them are not really eating enough veggies. Never mind fruit.
So there.. an Atkins diet has some very good parts and some bad ones.
From what I've read TNT is more like a Paleo diet. Hopefully not too much like Cordain's Paleo diet for Athletes... and more like Anthony Colpo's version of it that has less sat-fat-phobia. I'm afraid it's more Cordain/Friel like.. is it?
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