Fitness is a subject that includes a large number of sub-topics you should be familiar with. However that should really never be a challenge given the internet abounds with information. You should verify that any information you find is accurate, though. Getting injured is always a risk when you exercise or play sports; especially if you are out of shape or only work out once in a while. Although you naturally want to avoid injuries when possible, you should also have an idea of how to respond to one if it does occur. The most important type of injuries to be able to deal with are those that are serious enough to cause discomfort but not serious enough to call a doctor for.
Having 'six pack' abs is something everyone seems to want to achieve these days. Keep in mind that there's something artificial about the six pack, and you don't have to have this to look great. The way your abs appear has just as much to do with the amount of body fat you're carrying around as how well developed your muscles are. When you look at pictures of people with six packs, remember that they've stripped away most of their body fat. Getting rid of body fat will do more to give you a six pack than doing hundreds of abdominal exercises.
Of course lots of people turn to weights and weight training machines to get in good shape. Yet it's important that you balance out your workouts as much as possible. Create a program that hits all the areas and major muscle groups in your body. You don't only want to develop certain parts of your body, but all of it. If some of your muscles are overdeveloped and other underdeveloped, the results aren't very impressive. Secondly, you will be creating an imbalance with the strength levels of your muscles, tendons and ligaments. Injuries can occur when the body isn't developed in a balanced manner.
As you work out, you should get used to paying close attention to what your body is telling you. When you do any kind of exercise, your body sends you many helpful hints that you should be aware of. If you do a good warmup before your regular workout, for instance, you can observe if there are any tight areas. It's a good idea to focus on loosening up any such tight regions that you find. That's why stretching and warming up are so important before and after your regular workouts. Injuries often occur because of tight muscles, which is why stretching and loosening up are so vital. If you have not been working out regularly, the trickiest part is starting up again. Regardless of your situation or what is happening in your life, working out can actually change things for the better. There is no need to run a marathon or to bench press 1000 pounds. You simply need to get into better physical shape. Though it may take a little bit of effort to start exercising, you'll thank yourself later for the work that you do now.