ExRx.net http://exrx.net/forum/ 

Calories burned weight lifting http://exrx.net/forum/viewtopic.php?f=7&t=9216 
Page 2 of 2 
Author:  Oscar_Actuary [ Sun Jan 27, 2013 2:11 pm ] 
Post subject:  Re: Calories burned weight lifting 
we have switched to kilo calories and yes, its a silly converssation 
Author:  robertscott [ Sun Jan 27, 2013 2:17 pm ] 
Post subject:  Re: Calories burned weight lifting 
Oscar_Actuary wrote: we have switched to kilo calories and yes, its a silly converssation ya, very silly conversation. So if I do 4 sets of ten of a 100lb dumbell bench, I burn 2000 calories? I highly doubt it. 
Author:  Oscar_Actuary [ Sun Jan 27, 2013 2:18 pm ] 
Post subject:  Re: Calories burned weight lifting 
Dub wrote: After that, you haven't taken into account the time under tension. . I know you want to both mock this and on the other hand provide your own input, so you are conflicted. For the simple physical calculations, there is only "work" over distance. Holding weight apparently takes no effort. Now you got me wanting t oread about that. 
Author:  Oscar_Actuary [ Sun Jan 27, 2013 2:20 pm ] 
Post subject:  Re: Calories burned weight lifting 
robertscott wrote: Oscar_Actuary wrote: we have switched to kilo calories and yes, its a silly converssation ya, very silly conversation. So if I do 4 sets of ten of a 100lb dumbell bench, I burn 2000 calories? I highly doubt it. Actually probably more. The rub is that a "food calorie" is actually 1000 calories. We just use the term "calories" for normal talk 
Author:  tostig [ Sun Jan 27, 2013 2:35 pm ] 
Post subject:  Re: Calories burned weight lifting 
Just found this definition: http://science.yourdictionary.com/calorie So now we have to make a distinction between small calories or large calories. My calculations would be for small calories (540 small calories = 2260J) If we are talking about the calories in a cup of vanilla bean latte, then the 350 calories are large calories (350 000 small calories = 1.47 million Joules). I would have to do 6500 reps of this dumbell press to burn off the latte. Talking in Joules, here's one of my exercise sessions. 3 sets of Dumbbell Lunges  3473J 3 sets of Dumbbell Presses  7231J 3 sets of Dumbbell Rows  5070J 3 sets of Cable pull down  9600J Total session  25,374J in one hour. One Vanilla Bean Latte  350calories, 1.47million Joules? 
Author:  Oscar_Actuary [ Sun Jan 27, 2013 2:40 pm ] 
Post subject:  Re: Calories burned weight lifting 
yes 1 kilocalorie = 4184 joules 350 kilocalories = 1 464 400 joules google. 
Author:  stuward [ Sun Jan 27, 2013 5:00 pm ] 
Post subject:  Re: Calories burned weight lifting 
You're getting close. Since we already know the answer you're trying to get to, that you will burn the latte off in about an hour or so in the gym, you still have some factors to work into your equation. Of course the real question is what method promotes long term fat loss the best. Actual calorie burn may in irrelevant. 
Author:  tostig [ Sun Jan 27, 2013 9:30 pm ] 
Post subject:  Re: Calories burned weight lifting 
stuward wrote: You're getting close. Since we already know the answer you're trying to get to, that you will burn the latte off in about an hour or so in the gym, you still have some factors to work into your equation.... Not close enough. Between my dumbbell days 25,374J and my barbell days 48,876J that's an average of 37,125J in a one hour session. If the latte is really 1.47 million Joules (350,000 calories), it'll take over 39,000 hours to burn it all off. That's 4.5 years for one cup of gourmet coffee. Can't be right. 
Author:  Jungledoc [ Sun Jan 27, 2013 9:57 pm ] 
Post subject:  Re: Calories burned weight lifting 
tostig wrote: I would have to do 6500 reps of this dumbell press to burn off the latte. Well, most of us think it's a good idea to program in some cycles of highrep work! You could do 10 sets of 650 reps. 
Author:  tostig [ Sun Jan 27, 2013 10:24 pm ] 
Post subject:  Re: Calories burned weight lifting 
In my first post, I mentioned the body was not 100% efficient. So I asked if anybody knew what efficiency factor to put into the calculations. Here's what I found. http://www.bodyrecomposition.com/fatlo ... iency.html Quote: ..Now, the next question to look at is how much caloric expenditure (e.g. to cover a certain distance) varies for that range of efficiencies. Let’s say I ride my bike and generate a total power output of 420 kj (I’m picking this odd value to make the math simpler). To convert this to calories, I divide by 4.2 so that’s 100 calories. But only that only represents some percentage of the total I burned because only 2025% of what I burned calorically went into the actual power output that my Power meter measured. So to calculate it back out, I can divide by 0.2 for 20% efficiency or 0.25 for 25% efficiency. I’m going to use the extremes to save a bunch of calculations and look at what the maximum realistic change might actually be. 100 calories /0.2 = 500 calories burned 100 calories /0.25 = 400 calories burned... So my average 37,125J output can be 186,000J burned. Which equates to 7.8hours to burn off the 350calorie (1.46 million J) latte. Here's another discussion equating 16 calories to a flight of stairs. The energy calculations is between 0.47 and 0.68 depending upon body weight and how high a flight is. http://answers.google.com/answers/threadview?id=270575 So the efficiency factor can be from 5x to 35x. 
Author:  Oscar_Actuary [ Mon Jan 28, 2013 12:07 am ] 
Post subject:  Re: Calories burned weight lifting 
Just pick which ever effeciency factor allows you the number of lattes you want to drink that week. 
Author:  robertscott [ Mon Jan 28, 2013 8:07 am ] 
Post subject:  Re: Calories burned weight lifting 
I think the real question is why on earth you'd drink a vanilla bean latte... 
Author:  Jungledoc [ Tue Jan 29, 2013 2:00 pm ] 
Post subject:  Re: Calories burned weight lifting 
If you drink real coffee, you can sit with me in the men's section, and I'll treat you to some nice BAKED goods from my oven, and that will take even longer to burn off. I do admire you for burning off your latte with bench press instead of some stationary squirrel cage. And I sure that no matter how efficient everyone else is, I'm less. That's just how I've found life is. 
Page 2 of 2  All times are UTC  6 hours [ DST ] 
Powered by phpBB® Forum Software © phpBB Group http://www.phpbb.com/ 