When it comes to improving your fitness level, there are many different types of exercises from which to choose. The key is to pick the right ones for you. This means selecting activities you enjoy and are able to do consistently. Plus, research indicates that most people benefit from doing a variety of things in order to improve their fitness. For instance, you should choose some endurance or aerobic activities to help improve your heart and lungs as well as some strength or resistance training activities to help your muscles get stronger. Even adding in some balance and flexibility exercises can help improve your fitness level.