Benefits of cardio exercise - improving your engine
Someone once described the cardio system to me as your engine and it has kind of stuck.
In your car it's important to keep your engine running smoothly.
It may look lovely and shiny. It may have the latest gadgets. It may even have the power to tow your neighbour out of the mud. But if the engine isn't running properly it makes no difference.
You won't be going anywhere in it. You won't be towing anyone in it.
And it's the same with your body.
You may have six pack abs, a gorgeously pert bum and finally be able to fit into those skinny jeans that have been hanging in your wardrobe for years. But what's the point if you can't walk out of the front door to show anyone.
You may be able to press your partner over your head, deadlift two of yourself or squat over 100 kilos. But what's the point if you can't carry yourself up the stairs.
Ok, so they are extreme examples, but if you don't work on your cardio it could come to that.
Here comes the sciencey bit ...
Our bodies are designed to move. And to move you need to supply oxygen to your muscles and get waste products out of your body.
This is done by your heart and your lungs.
The more you move the harder your lungs and your heart have to work.
Your lungs inhale more deeply to get that supply of oxygen and exhale more deeply to get rid of waste products, carbon dioxide and lactic acid. Your heart beats more strongly to fuel that delivery.
By working your cardio system you do all of this more efficiently.