Is 59 percent lung capacity bad?

59 percent lung capacity is not bad.

The average lung capacity for adult men is between 3,000 to 5,000 cubic centimeters (cc), and for women it is between 2,000 to 4,000 cc. With individual variation, healthy individuals usually have at least 80% of the predicted lung capacity. For a 5'10" man, 80% of the predicted lung capacity would be 4000 cc, which is almost twice the OP's lung capacity.

However, a person's lung capacity can vary depending on a number of factors, such as age, sex, height, and weight. It is also important to note that lung capacity can decrease over time due to factors such as smoking, air pollution, and certain medical conditions.

If you are concerned about your lung capacity, it is best to talk to your doctor. They can perform a variety of tests to measure your lung capacity and determine if it is within the normal range for your age, sex, and height.