In the last 3 years in particular, I have been working on my core strength and stretching. It helped my back problems, rehab after back surgery, swimming and stability. The core is the connector between your upper and lower body and should be thought of as a vital link for triathlon.

When you run, you swing your arms to counter to your leg movement. In the middle is the core. If you get out of your saddle while cycling, your hands grasp the handlebars while feet are in the pedals. The middle link is the core. The link between your stroke and your kick while swimming is your core.

As I increased my core strength, I noticed simple functional things in daily life also got easier like bending over, getting up and good posture. These make so much more of a difference now than when I was 18 years old.