Ectomorphs should rest a day or two between workouts. A M-W-F schedule is ideal for rest and frequency.

How many days a week should an ectomorph workout?

Ectomorphs tend to excel in endurance-type activities, so it's not surprising that many prefer cardio training over weight lifting. The key to stimulate muscle growth is to do the minimal amount of cardio required for general health. Three times a week for 30 minutes is recommended.

How should a ectomorph workout?

Perfect Workout Routine For Ectomorphs:

Most of the training should revolve around the big basic moves: squats, bench press, shoulder press, deadlift, chin-ups. Cut the basic isolation exercises involving only one muscle or region in the body, as they do not provide enough stimulus for muscle growth.