I work with a trainer 2x a week. Mostly for aesthetics and to get stronger. We do legs one day and upper body on the other day but he switches it up. So one week we’ll do squats/leg press/pistol squats/single leg TRX squats for leg day. Another week we may do deadlifts. Goblet squats/kettlebell lunges/hip the etc. same with upper body. Pull ups/push ups/rows. But the exercises vary week by week. Is that a non-productive way to work out? I’m always sore the next day and have progressed in weight used but was wondering if I would be doing even better with a formal program.