Veiny arms: Are they a sign of fitness?

People may begin with a lower calorie diet to lose body fat before switching to a higher calorie diet to build muscle.Resistance exercise and following a healthful diet over several months can increase muscle mass and reduce body fat, thereby leading to more prominent veins in the arms.Veiny arms may occur for a number of other reasons, including:In some cases, visible veins could indicate an underlying medical condition, such as:Anyone who is concerned about prominent veins in the arms or elsewhere on their body should contact their doctor. However, veins can become more prominent if a person has high muscle mass and low body fat.Weightlifting and other types of resistance training can increase vein visibility in the arms.