Why is even a slow, short jog much more taxing than a long walk?

Question

I’m trying to do Couch to 5K at the moment to improve my personal fitness.

I can do long walks of an hour or more (10k+ in one go) with relative ease.

Yet a one minute run (which is Week 1 Workout 1 in C25K!) at an INCREDIBLY slow jogging pace is pushing my heart rate nearly to dangerous levels and I am finding it immensely challenging.

So what is it about a light jog that makes it so much more difficult than walking?

In: 38

Answer 1

Some long distance runners shuffle without so much up and down motion.

You will learn to be more efficient.