As someone who works directly in the healthcare industry (my wife is a doctor, and I develop medical diagnostic software), the first thing I can tell you is to revisit your assumption. You said you've started to eat better, yet failed to define what “better” means. read more
To improve cardiovascular fitness, interval training, as suggested, is a very good approach. But interval training requires stamina and stamina comes from strength. Therefore, include muscle building exercises in your routine and you will be able to maximize the gains from interval training. read more
To improve cardio any fitness level you should run at a pace that is just faster than where it is still comfortable to talk as you run. It is also about technique, you should not tense your shoulders (they should be controlled but loose) and make sure that your arms do not cross the center of your body as you run because this is a very inefficient way to run. read more
Current research shows that the quickest way to improve cardiovascular fitness is to combine large volumes of moderate intensity distance training with less frequent use of high intensity interval training (HIIT) and high intensity continuous exercise, all of which target different aspects of fitness. read more