First..fat is NOT a viable energy source during intense training...carbs are and in a severe deficit...muscle is converted to carbs.
Second...No matter how hard you train...in a deficit...the body's first priority is NOT muscle repair. Your muscles DO NOT have to heal.
Third, water makes up 75%+- of muscle. When you cut back calories, which are essential for life...you hold less water...thus less muscle!
In a severe deficit, the hormonal environment favors fat storage and muscle destruction...even without training. Add training and you boost the destructive effect.
Did that cover why the thinking is wrong.
Ok..
now..there IS a way to play with short term caloric ups and downs to get a boost in weight loss...but you have to have been at maintenance-plus for a bit so the hormonal environment will favor this.
Why not just take the 1-2 pounds a week?
There are all sorts of ways to fine tune this...calories, nutrient timing, training intensity/progressions, cardio intensity/progressions, nutrient composition...
It is good to challenge the status quo of the going thought..but the standard 500-1000 cal deficit a day WORKS...if all else is in the right alignment.
Cheers!
<message edited by danmirage on Wednesday, December 06, 2006 8:57 PM>