Do you have the capacity?

Any one of us on this planet has the ability to incredible things. Barring injury, any human has the ability to complete an Ironman distance triathlon tomorrow if we needed to. That's right. I'm talking about swimming 2.4 miles, or for the other 99% of the world, a 3.9km swim, we could bike 112 miles or 180.2km of biking and a then run a marathon, 26.2 miles 42.2km. But a few things come in to play here:

1. How long would it take you?
2. How much would you enjoy it?
3. How injured might you get?
4. How likely would you be willing to do this again?

Answer to these questions are as follows:

1. Too long
2. Not at all
3. Everything hurts
4. Rarely in my life do I use the word 'never' but it certainly applies in this situation

The other answers to these questions lie in your training.

Are you spending time in the pool building aerobic endurance? Are you spending quality time in the saddle to build muscular endurance? And are you running enough (hint: it's less than you think) quality miles to benefit from you swim and bike without causing injury to yourself?

I subscribe to the philosophy that any one of us is capable of great things. It is the amount of capacity we have from our training that allows us to reach our goals. 

How is your capacity?