If you’re 150 pounds walking briskly (around 3.5 miles per hour) will burn around 300 calories every 60 minutes. If you can fit in 30 minutes of brisk walking on a flat surface every day, you’ll have burned off 1,050 calories by the end of the week.
http://www.eatthis.com/walking-for-weight-loss
Those power walking also dropped more than 2 inches from their waistlines, pared about 3 times more fat from their thighs, shed 4 times more total body fat, and lost almost 8 pounds over 16 weeks—all without dieting!
http://www.prevention.com/fitness/fitness-tips/lose-your-belly-fat-8-week-walking-workout
If you are walking, I think a couple of things are important. - Speed : Since it is dependent on Distance and Time. - If you maintain speed, you need to know for how LONG and how FAR can you go with that. - I believe STAMINA is most important.
https://answers.yahoo.com/question/index?qid=20060626022138AAdnbs2
It is a function of work in physics. Work = distance x time. Walking 1 mile at 2 mph = walking 2 miles at 1 mph. They will use the same amount of energy to get the same amount of work done. (Energy being Calories) The best measure of exercise is time...the more time spent exercising the better off you are.
https://answers.yahoo.com/question/index?qid=20060626022138AAdnbs2
Start with our 8-week progressive walking plan, which includes both shorter, high-intensity workouts and longer, moderate-paced ones. Add in the Flat Belly sculpting moves to firm your ever-shrinking middle. In just 2 months, you could walk off 1 or 2 sizes—without dieting!
http://www.prevention.com/fitness/fitness-tips/lose-your-belly-fat-8-week-walking-workout
A distance-walking program requires a lot of training, but it can lead to a big payoff in weight loss as well as health and fitness. Walking even short distances daily for many years spurs considerable weight loss, and distance walking can be even more beneficial.
http://www.livestrong.com/article/346231-distance-walking-for-weight-loss/
If you can pack on just five pounds of muscle and sustain it, you’ll burn the caloric equivalent of three pounds of fat over the course of a year. Pair that extra brawn with 30 minutes of brisk walking once a day and you’ll start cutting down on your extra fat deposits in no time.
http://www.eatthis.com/walking-for-weight-loss
As well as altering your speed, a great way to burn more belly fat is to switch up the surface you’re walking on. See, walking on grass or gravel burns more calories than walking on a track while walking on soft sand increases caloric expenditure by almost 50 percent, provided that you can keep your pace the same.
http://www.eatthis.com/walking-for-weight-loss
A 160-lb. person who walks only 35 minutes daily for 15 years weighs 18 fewer lbs. than a nonwalker, according to Harvard Men's Health Watch. Distance walking can help you lose more weight in less time. Walking 4 mph for an hour burns 334 calories, or slightly less than one-tenth of a pound if you weigh 155 lbs. Consequently, you can lose almost 18 lbs. in one year if you walked 4 miles almost every other day, or 180 times, during a year.
http://www.livestrong.com/article/346231-distance-walking-for-weight-loss/
You ought to be if you want to get the most out of your walk. See, vigorous arm pumping not only speeds your pace, it also provides a good upper body workout. What’s more: an arm swinging walking style will cause you to burn 5 to 10 percent more calories. Bend your arms at 90 degrees and pump from the shoulder. Swing them naturally, as if you're reaching for your wallet in your back pocket. On the swing forward, your wrist should be near the center of your chest.
http://www.eatthis.com/walking-for-weight-loss
which is more important for weight loss the distance or the speed of walking?
Distance is more important for walking, not the speed of walking.