As mentioned above, the paper I’m basing all of this nonsense on was looking at non-exercising dieting or fasting men, not folks who were training or taking drugs. And it mentioned specifically that both of those could potentially increase the maximum rate of fat mobilization value (above 31 cal/lb) without sacrificing lean body mass. Certainly, once again, this idea passes the reality check. Even the addition of the ephedrine/caffeine stack elevates fat loss while sparing muscle mass. Clenbuterol is more potent, GH is great and DNP is like fucking magic.
Clearly, exercise also has an impact. Even back in Bodyopus, Dan mentioned that only part of the total deficit (he used 20%) should come from diet, the other part should come from increased activity. This usually means aerobics, but some prefer to use high rep/short rest period weight training or interval training and there is some logic to picking one of the latter options. He suggested that men do better with 15% calorie deficit and 5% aerobics and women at 10% apiece. Given the issues women have with lower bodyfat blood flow, and that aerobic activity can overcome some of the limitations that make lower bodyfat so stubborn, that makes a lot of sense. As well, women (because of their lower maintenance requirements), end up eating a tiny amount of food if they cut too much out of their diet. Increasing their net daily deficit via activity allows them to eat more and not starve to death on a daily basis. I’ve been working on the stubborn bodyfat issue for years now; my next book outlines not only the problem but multiple solutions to that problem.
$AD$
In this article, I’ve been able to give dieters a starting point for the maximum sustainable deficit which can come from calorie restriction. To summarize: simply determine how many pounds of fat you’re carrying. Then multiply that value by 31 calories. That’s how much you can potentially decrease your daily food intake. If you want to try to increase fat loss, any further increase in the deficit should either come from increased activity or compounds that either increase the mobilization or burning of fatty acids for fuel. As well, as you get leaner/lighter, you will need to periodically recalculate your daily calories to take into account your diminishing fat mass and decreased maintenance requirements due to both decreased bodymass and the adaptive component of metabolic rate. An argument can also be made for saving increases in activity for later in the diet when your diet deficit has to be lower.
Please keep in mind, however, all of these theoretical calculations sort of pale to real world results. If you’re losing strength in the weight room like crazy, your deficit is too big regardless of what the math works out too, increase them until you stop hemorrhaging strength (and probably muscle). And even if you have to trial and error it a bit, the above should at least give you a starting point.
1. Alpert SS. A limit on the energy transfer rate from the human fat store in hypophagia. J Theor Biol. 2005 Mar 7;233(1):1-13.
Lyle McDonald is an all around physiology nerd with far too much time on his hands who apparently enjoys doing math for his readers. You can read more of his work or join his new weekly (no, really) newsletter at www.bodyrecomposition.com. You should buy all of his books from his store at store.lylemcdonald.com. You know you want to.