Should Biceps and Triceps Be Trained Together?

It is fine to work tricep and biceps on the same day. The biceps and triceps are both located in the upper arm, though they are situated in different areas. Because they belong to different muscle groups: one posterior and one anterior, you can perform biceps and triceps same day workouts.

Should I train biceps or triceps first?

If you're training your biceps alone, then tossing your triceps in at the end of a chest or shoulder workout, you're treating them as an afterthought and that's how they'll respond. And if you're training bi's and tri's together, you probably train biceps first.

Is it better to train arms separately?

First, by training them alone, opposite major body parts, you will have more strength. ... Lastly, training arms on a separate day allows for greater concentration during each movement. The body is not pre-exhausted from training a larger muscle group before training arms, the smaller muscle group.