A: Depending upon your experience level, preference, recovery capacity, and time available, you’ll likely find that 3-5 strength training sessions per week is the sweet spot. If you’re just getting started with weight training, then you should stick with 3 days per week and work your way up. Novices and early intermediates can handle 4 days per week with a split such as an upper lower and seasoned intermediate lifters may be able to handle 5 sessions per week depending upon the programming, recovery, and nutrition strategies that are in place.
(3) Protein - this is a very important nutrient (macro) as the body doesn’t really store protein. It recycles protein as we are mainly protein, so it makes sense for protein metabolism/catabolism to be equally constant…which means we should make sure to be consuming protein via food or supplements (food over supplements) to keep up with this process. If we aren’t consuming protein, then the body will be forced to mostly use it own protein (muscle) for energy. Sure, amino acids help via BCAA vs EAA, but whole protein (complete) combines every amino acid. Certain foods are complete, while some are lightly complete. So strive to eat foods that collectively create whole protein (complete). I also suggest no less then 100g of protein just to play things safe and then manipulate (adjust amount) upon determination.
Note that this recommendation is for total weekly volume, which means it would need to be divided up based on how many times you’re training each muscle group per week. So, for example, someone training everything twice per week would do 30-70 reps for each bigger muscle group in each of those workouts, and 15-35 reps for each smaller muscle group in each of those workouts.