Question: how many days a week can you work arms?
Answer: You can train arms between 2-6 times per week. The more frequently you train arms, the less you should do per day. If you train arms twice per week, you'll do 2-3 exercises per session with 3-4 total sets. If you train arms 6 days per week, you'll do one exercise per muscle group per day, with only 2 sets per workout.