A good result on a treadmill stress test depends on several factors, including age, fitness level, and medical history. Generally, a good result indicates that the heart is functioning well during exercise and that there are no signs of significant blockages in the arteries. Results are often measured in METs (metabolic equivalents) and a score of 9 or higher is considered a good result. However, it's important to note that results can vary for each individual and should be evaluated by a medical professional.