Popsugar Fitness Workouts Best Muscle-Building Exercises I'm a Trainer, and These Are 24 of My Favorite Muscle-Building Exercises February 7, 2019 by Tamara Pridgett View On One Page Photo 17 of 25 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 17 Arnold Press Start holding dumbbells directly in front of your face with arms bent at a 90-degree angle. Open arms out to the side, maintaining the bend at the elbow. Press weights directly up so that arms are fully extending. Return to start by reversing the entire movement. This completes one rep. Previous Next Start Slideshow WorkoutsStrength TrainingDumbbell ExercisesTrainer Tips