A quote from CT in the above thread regarding Best Damn while losing weight:
"This is a good way to train while on a fat loss diet. Doing more volume would cause a cortisol spike that would lead to muscle loss while on a caloric deficit.
Of course you can’t gain a lot of muscle on a caloric deficit so you are not getting the most out of the program. BUT you must train when you are on a caloric deficit too, and this is likely the least damageable way to train in that situation."