4. Legs: Sumo deadlift

Start with legs in a wide stance and feet facing out at 45 degrees. Squat down until shins are parallel to floor and arms are straight holding a dumbbell. From this position drive up through legs to upright position and then lower back down.

Why it works: This exercise hits all muscles of the leg to help increase muscle of ectomorph. By having feet wide it helps work the inside of thigh.