Cardio - What's Best and Injuries (and how to Prevent Them)

Cardio. Many people hate it, many people love it. Personally I love cardio but unfortunately, a few months back I injured myself running and have been out since then. I swam for a while but even that's painful now. Injured? You're not alone. But let's forget about that for a minute. 

What's the BEST Cardio?
We all love different things. I'm sure some of you are running enthusiasts or committed swimmers, and if you're just starting out in trying to improve your fitness then it can be confusing as to what to do!
My advice to you, if you just want to keep your body fat low (or lose fat) is the most simplest thing of all: WALKING. I know right, I must be nuts. Walking? Why would I tell you to walk to lose fat when there's all these fancy machines in the gym that will make your soul hurt and bring you to a point of collapse. 
Well, it's very simple actually, walking is very easy on the joints and a brisk walk once a day will have you burning a decent amount of calories, enough to make a difference in the long run. And that's all fitness is really, improving yourself slowly, step by step. 
I suggest waking up and going for an hours walk, not too slow but not too fast, you shouldn't be gasping for air. If this is too easy for you then you can try buying a weighted vest. You could also try this whilst holding dumbbells in each hand (this is also a great trap workout). This might not always be suitable in public though. 
Don't expect to see dramatic changes overnight, however. Typically, the more bodyfat you have the quicker you will lose fat. This doesn't mean you'll wake up one day with it all magically melted away though. 
Set yourself a target. This is the easiest way to get started. For 1 whole months don't eat any junk food, or don't drink any alcohol or make sure you get out and walk for that hour! After this month you'll not only feel great, but you'll have the motivation to keep at it. 

Running and Jogging
Running puts a tremendous amount of stress on the joints. When running, always consider what surface you're running on. Running on concrete on the sidewalk is not the way to go - try looking for grass to run on or even a running track nearby. 
Your shoes are also important. I know there's a whole "barefoot running" craze at the moment, but personally I don't want to risk cutting my foot on the paths thousands of people walk on daily. Do so at your own risk, haha. For years now we've been buying up thick soled shoes at hefty prices, but new research suggests that these shoes are actually doing us more harm than good. Many people are now suggesting we go back to flat soled shoes without that thick heel, the view will probably change in another 5 years or so. 
I recently injured myself running. I thought it was a classic case of the shin splints, but I've been out for 3 months now and admittedly the fat is rolling on. I'm going to hopefully start walking again next week. I guess we're in this together. 
ALWAYS make sure you stretch before you go on your run. I can't stress how vital this is. A great calf stretch is standing on a step, or the edge of the sidewalk, and lowering your calves down towards the ground till you feel the stretch. I'd also suggest strengthening the front of the shin. To do this stand on a step with your heels on the step and lower your toes towards the floor. Bring them back up and repeat. A quick Google search will provide you with countless amount of stretches to do before your run. Make sure you stretch the muscles which are effected in a major way throughout your run.

Swimming
Swimming is a great form of cardio. Low impact and it hits such a wide range of muscle groups. Seriously, I'd suggest it for anybody who is looking to get a great work out from a low intensity activity. 
Some would say that swimming is not ideal for bodybuilders or powerlifters etc etc but I would have to disagree. I've made my best gains whilst swimming.
One thing I would say though, is make sure to stretch the pec-minor! A great way to do this is to stand at a corner of a wall, and put your forearm on the wall at a 90 degree angle to the way your standing. I will add a picture of this soon to make it more understandable. Till then Google pec-minor stretch if you need a more detailed view.