If you are on a calorie deficit (i.e. cutting) do not train beyond failure. your aim is to maintain the most muscle so do not do heavy sets i.e. below 8 reps or you will be vulenrable to injury as you'll be dehydrated. Check out blood and guts by dorian yates.
Btw avoid being in a ketosis while cutting as you will lose a good deal of muscle mass too...try to diet on a longer period. ex. 300 to 500 calorie deficit per day at the most while keeping protein to at least 1 g per lb of body weight over a 16-20 week period, in other words try a slow cut.
Btw avoid being in a ketosis while cutting as you will lose a good deal of muscle mass too...try to diet on a longer period. ex. 300 to 500 calorie deficit per day at the most while keeping protein to at least 1 g per lb of body weight over a 16-20 week period, in other words try a slow cut.