Exercise and fitness: walking to work

Self-tutoring about exercise: the tutor reflects.

My work bag probably weighs 20lb. I’m ashamed to say that’s about 11 percent of my weight, but anyway…

I wondered, on my way one morning, what the extra weight would mean for my energy expenditure. I realized that the work done walking is likely just the lift at the ankles; moving forward doesn’t require much energy, since it’s not against gravity.

Therefore, I decided, carrying 11 percent more weight should simply mean 11 percent more calorie expenditure.

For fitness purposes, however, I think 11 percent more exertion can mean a dramatic difference. For instance: carrying that bag, I’m breathing noticeably, which wouldn’t be true walking without it.

I’ll follow up.