The short answer to that question is 'Yes'. Situations and results may vary, but with our human bodies we are facing a use it or lose it situation. I feel this from experience, but I'm not a researcher. Phil Campbell is.

I spoke with Phil about the Sprint 8 Cardio Program. I loved his description of it as 'scientific play'.

Sprint 8 is nothing more than scientific play. How many young children do you know that come up to their parents and say 'I'm going to go run 10 miles at a 9 minute pace.'?

That's no fun, unless you are an endurance athlete. If you are we are preaching to the choir. If you aren't, you are probably looking for a way to stay healthy, and play is the way. Maybe you'll like the Sprint 8 program. I'm not here to sell it to you. I am here to encourage you to find the way that works for you.

Personally, I like to just go outside and play. If you have a dog, that dog wants to go for a run. If you have a child, that child wants to play with you. If you are alone, the whole world is stretched out in front of you.

When I am training for a race, just playing isn't enough. I need more structure to achieve specific results. For those whose doctor has raised red flags about weight, stamina, cardiovascular health or other issues, structure may also be necessary. It helps with commitment, regularity and for those of us who don't know how, it gives us the info we need.

We are facing a 'use it or lose it' proposition with our bodies. You don't get another one. Movement is required. Join a gym. Read a book. Try Sprint 8. Do something!!