Popsugar Health & Fitness Arm Workouts At-Home Arm Exercises 12 Arm Exercises You Can Do at Home For a Toned Upper Body 16 July 2018 by Laura Arndt View On One Page Photo 7 of 12 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 7 Skull Crushers Using a bench or a mat, skull crushers tone your triceps, core and puts minimal strain on your back and shoulders. Start by laying down and one dumbbell in each hand. Extend your arms straight towards the ceiling. Bend at your elbows and lower the weights back behind your head before returning to starting position. Complete 15-20 repetitions. Previous Next Start Slideshow Arm WorkoutsBeginner WorkoutsArm ExercisesStrength TrainingWorkouts