Should I train my rotator cuff before or after a workout and how many days a week should I train it. Somebody also hit me up with a good routine for the rotator cuff.
Isolation training for your RO Cuff (in a non-rehab setting) is inefficient and unnecessary as it's already activated during more complex exercises.
You're body moves as a unit and muscles never act in isolation. Your rotator-cuff should not be trained "alone" as it a critical dynamic stabilizer for the most unstable joint in your body, your shoulder.
Here's one Progression:
Chop and Lift (1/2 Kneel >> Tall Kneel >> Standing).
Utilize Exercises that incorporate Diagonal Patterns (Known as D2 Flexion and Extension)