Walk or Run

Seriously? Chi, that's a really bad excuse not to be riding. You know I don't like to be hard on you, but...

Getting the tire off is the easy part. It should not take that long. Do you have tire levers/irons? Visit sheldonbrown's site...he can walk you thru a tire change.

heh...you said "hard on"...

You burn a bit more calories by running, because the biomechanics are different. When you walk, you weight is always supported, but when you run, there are intervals where you're completely off the ground. The act of putting all of your weight in the air produces a greater energy demand.

Walking really puts you in high Z1 / low Z2???  I can't get near high Z1/Z2 walking.

2-3 levers will get a tire off! If they don't get out the knife, LOL!

Probably, if you can't get the tire off with just one. Some tires seem to come off more easily than others. I can get my current tires off with just one lever (could probably do it with none if I really had to), but I've had tires in the past (on different wheels) that I really needed two levers for.

I don't post much, but your facts and conclusions are just so wacko (to use the technical term) I just have to say something.

There is no way that biking 1hr at 15 mph burns more cals than running 1hr at 5 mph.  As you say in a later post your heart rate is lower when biking and hr directly correlates to the amount of oxygen your using, so lower hr less O2, less calories burned. 

Even if you want to think of it as a fat vs. CHO thing.  If your hr was the same for biking and running, and running uses more total muscle mass, therefore when biking the muscles that are being used are using more O2 per cell and therefore are operating at a higher intensity/zone and burning a higher % of Carbs.

To answer your original question of walk vs. run, I'd run, and at a slow enough pace to stay in Z2.  Don't break up your run with walks to keep your hr down just run slow so your hr stays where you want it.

It's an online calculator, so it's making some assumptions.

Here's my thoughts on what you should do:

Go out and train for your race.  If weight loss is really key for you right now, then you need to find a nutritionist who can help you with your diet.  You're worried about detail stuff, and missing the forest for the trees.  I think that by training to run a marathon, swim 2.4 miles, and bike 112 miles, you're gonna lose weight.

Get your head in the game, get your bike fixed, and start running. 

You should print this and put it on your parent's refrigerator at home.  This is gospel to you............ 

Then the online calculators is wrong.  the fact is that hr=o2=cals (not really = but its no quick way to type "proportional to"  and you say lower hr while biking therefore less calories.

Not that I think you should be training for calories.  Train to race or for health, control calories through diet.

I said Run simply because you will get faster and have the ability to go farther the more miles you put in. (And as you drop the lbs)

If nothing else, running will be more enjoyable and so you will be more likely to not bag the workout. (At least that is my story)

Good Luck

We can all be Monday morning QB's and sit here and tell you what to do or argue over what will burn 20 more calories but what it comes down to is how bad you want it.

You are signed up for the race of your life next August and what you do today and everyday forward will make the difference of finishing strong or blowing up and DNFing.

You have plenty of time to drop the weight but it has to start now or else you will wake up next summer still argueing what will burn 50 more calories.

I am definatly pulling for you man, I want to see you kick some serious A@@ in Kentucky but you need consistensy and the day in and day out working your tail off getting yourself physically and mentally ready for this challenge.

Spend 3 less minutes on BT today and figure out how to change that tire. (You might need it in your race afterall) Get that bike on the trainer and just get the sweat a pouring. Eat right, train smart and own it.

These are all easy things to say but hard to do. Look at any successful person in any walk of life be it business, athlete, or you name it and they got there with hard and smart work.

There is no secret on how to eat an elephant but one bite at a time. No shortcuts, no technicalities to it but ONE BITE AT A TIME!!!!

Now get out there and bust it man, we are pulling for you