While a full-body workout training split has its advantages, it's best not to do it every day. It's important that your muscles have adequate rest and recovery time to prevent overtraining. So, if you prefer a full-body workout training split, keep it to 2-3 workouts per week for the best results.
How many days a week should I do upper body?
You need to be hitting the weights at least three days per week. The research says that at the very least, training a minimum of two days per week is needed to maximize muscle growth.
How often should you do upper body workouts?
Schoenfeld's recommendations: If you split your training into upper-and lower-body days, do two upper-body days and two lower-body days per week. But if you like total-body training and want to maximize your gains, Schoenfeld advises lifting three times per week.