Without further ado, here are the top two exercises for each muscle group I used to gain 41 pounds of muscle mass in under six months:
Chest: Bench Press and Flat DB Chest Press
Back: Bent Over Barbell Rows and Close Grip Chin Ups
Shoulders: Seated DB Shoulder Press and Standing Military Press
Triceps: Dips and Tricep Pressdowns
Biceps: Standing Barbell Curls and Incline Bicep Curls
Quads: Squats and Lunges
Hips: Deadlifts and Stiff Leg Deadlifts
Lower Back: Good Mornings
Calves: Standing Calve Raises
Abdominals: Weighted Ball Situps and Weighted Cable Crunches
Yes, there are many more exercises I did not list but these are simply the best. Stick to these weight training exercises for the best possible muscular and strength gains and you will have a rock-hard muscular body in less time than before!