Fast bowling is not an easy job. Especially if you are also a batsman as well as being a fast bowler, a fast bowler has to work harder than any other cricketer on his fitness.
If someone had said to me before I started doing this that a human being is capable of running 100 miles nonstop, I would have just said: 'No way. I mean, how?' If you just go out there and run 100 miles, it breaks down a lot of barriers in terms of self-imposed limitations.
If you ask me the best bowler, then Wasim Akram was the best bowler because he had a lot of variety. Even when you were batting on 100 or 150, you're not very sure... He could still get you out. That was his forte.
When I was a kid, my first dream was to play Test matches, and the second one was to play 100 Test matches because there are very few people who have played 100 Tests for India.
When we play the game like we're supposed to play it, it is pretty easy. Making the extra pass, making the simple play, it's not about between your legs, behind your back, and all of that, it's just about scoring the bucket.
At one stage, I just wanted to play one Test for India. People used to say I was just a T20 bowler, a limited-overs bowler. All these tag lines were doing the rounds but I did want to make a difference.
For 100 m., you have to go out fast but also bring it back, so we've been doing a lot of work on the back-end speed.
If you've got one bowler - particularly a fast bowler - who is really aggressive, all over the opposition, he brings the rest of the team along with him.
There is nobody called Test bowler, one day bowler or T20 bowler. It just how you adapt and make a difference to your own game.
Did Muddy Waters play an acoustic? Well of course he did. But did he turn his back on being able to plug it in and play louder? No, he plugged in and turned it up and got miles and miles ahead of the game in one fateful act of just plugging in.
In India you pick teams based on pitches, so it's the bowlers who get changed. if it is a turning pitch a fast bowler can't play, and if it is a green pitch, a spinner can't play.
From a spectator point of view, Test cricket is not important; people hardly watch Test cricket. But as a player, Tests are the real thing. You have to concentrate for five days. It's a lot of time, and not easy to do it day in and day out. If people have played 70-100 Tests, it's a lot of cricket, a lot of concentration and dedication.
If someone says, 'Hey, I ran 100 miles this week. How far did you run?' ignore him! What the hell difference does it make?.... The magic is in the man, not the 100 miles.
I've run a lot of miles over the years, some fast and some not so fast. I've won some big races and I've had some big disappointments, but I enjoy the freedom of running and the challenge of training and competition as much now as when I first started back in high school.
My back hurts. My legs ache. I'm only four!
There's little that's subtle about Hardus Viljoen - he's a broad-chested, broad-shouldered fast bowler, who simply trundles up to the wicket and hurls it down as fast as possible.