TVE protein is what your muscles need to grow, so maybe the amount or efficiency your body uses it up isn't the same, but you still need it.
working a muscle group every day, and just that muscle group will get you sore there in the morning, and the morning after probably. to fully recover your muscles you should get about a week rest so you can continue where you left off, and not need to lower weight the second/third time the week.
the isolation thing will also get you definate results. if you work a few muscles one day, then move on to another group another day, you are likely working a few muscles multiple times.
when i said every month or so. take a week off, maybe if you are feeling really ambitious, work groups somewhat lightly.
the biggest mistakes in working out are not taking enough brakes to give your muscles recovery time, too much weight (you just hurt yourself), and you dont switch up the workouts.
if you dont switch up the workouts, you will reach a plateu, and you will see no gain for a while; your body just gets used to the workout.
remember, cables work you different then barbels, which work you different from dumbels.
for a muscle group like chest, maybe you want to mainly do bench, or stuff with the bar; thats ok. but once a month, use the cables instead for 2 weeks about. make your body build muscle again.
for me, idk how right this is, but....
lets say im benching. monday is my bench day, so monday is when i do it. so say monday (in 2 days) i want to see where i max out. start really light, like 145 if my max is 200. 10 reps of that about, add 25's, so im at 185; 3 reps of that. do 1 rep increments of gradually adding weight until you cant anymore.
do not add all the weight at once, you will hurt yourself. do not max out the same day you work...you will tire yourself out.
generally- 1-6 reps is for pure stregnth.
6-10 reps is for muscle mass
10+ reps is for endurance
the modified drop set i talked about a few posts up focuses on keeping your muscles un-injured, muscle mass, and endurance a little bit.