Performing the: A Step-by-Step Tutorial Dumbbell One Arm Reverse Spider Curl
Hold the dumbbell in one hand with a supine grip (palm facing upwards) and let it hang down naturally from your shoulder, this is your starting position.
Slowly curl the dumbbell up towards your shoulder while keeping your upper arm stationary, only bending at the elbow.
Hold the peak position for a moment, ensuring that you squeeze your bicep at the top of the movement.
Gradually lower the dumbbell back to the starting position, fully extending your arm and feeling a stretch in your bicep, then repeat the movement for the desired number of repetitions before switching to the other arm.