Learn how incline dumbbell curls target the long head of your biceps for peak growth. Discover benefits, form tips, variations, and FAQs for bigger arms. Looking to grow bigger, more defined biceps? Start performing the incline dumbbell curl! Read on to learn what it is and how to perform incline curls. Specifically, you should be doing the incline dumbbell curl. True, the incline dumbbell curl is an old-school bodybuilding exercise that builds thick, eye-catching arms. It also promotes positional tolerance and tendon capacity — two key traits for long-term joint health. The incline dumbbell curl is a secret weapon for bicep growth. This bicep isolation exercise is a variation of the traditional bicep curl, but it has its own uniqueness.