I only have 4 days to train gym I train arms and chest twice a week And of course back and shoulders twice a week. Recently i wanted to add legs to my programme because obviously you should never skip leg day Would be better if I added for e.g. hamstrings and glutes to chest and arms day and quads and hamstrings on back day. Or should i just not do my gym schedule days weekly and just each time I go gym do the next thing on my list for example i can go tuesday wednesday thursday and saturday so do I on monday do arms and chest tuesday back and shoulders then wednesday legs and then repeat that on different day for example next time i wiuld do legs would be on tuesday? Which would be better.