Arnold wrote that he always included at least one dumbbell movement in his routine. By supinating his hand (turning it upward as he curled), he felt he got a greater "peaking" effect because the brachialis is recruited into the motion when the hand starts in the neutral position. Arnold performed supinating dumbbell curls simultaneously and with alternating reps. The latter allows more body English and a bit of rest between reps.
Start standing with feet shoulder-width apart and dumbbells in hand. Hinge at the hips so that back is nearly parallel to floor and micro-bend knees. Let the dumbbells hang straight down, palms facing each other. Keeping back flat and torso still, engage back muscles to lift arms straight out to sides until they’re in line with shoulders. Your upper body will form a “T.” Return to starting position then repeat for 3 sets of 12 reps.
Use protein supplements wisely. Throwing back a protein shake every morning is not a guarantee that your body will build muscle mass. Although protein shakes are not inherently bad, they are also not a magical means of building muscle. If you decide to implement a protein supplement in your diet, make sure the ingredients are high-quality (i.e. not riddled with sugar and empty carbs).
For every person who lifts weights these days, it seems there are two who have a podcast about it. There are more bodybuilding tips promising greater strength and muscle than ever before, and along with them a ton of confusion; one buffed-up Instagrammer says lifting heavy will get you swole, while a well-known fitness personality has claimed in recent years that two 30-minute workouts per week netted him 34 pounds of muscle in a month.