Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Start holding a dumbbell in each hand, palms facing you. Curl one weight upward, stopping just above your elbow, and then slowly lower it back down. Alternate sides for a continuous bicep workout.
Extend your arms fully between each curl. Choose a weight that permits controlled movements. Keep your elbows tucked in to target your biceps. Focus on technique rather than lifting the heaviest possible weight.
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