Wed 5 Dec 2007
Fat Burning Mistakes — How To Choose The Proper Weight
Posted by Brad under Energy Flux, Fat Loss Black Book, HIIT, Videos
1 Comment
I hear a lot of people asking about “toning” and how much weight they should use…
Therefore, I’ve included a small portion of The Fat Loss Black Book to help explain it… based on the 1st Law Of Thermo
Here you go.
(start excerpt)
The key to burning the most calories through weight training AND triggering the highest “afterburn” potential revolves around the amount of WORK (the scientific definition) you do. In the bodybuilding realm, they like to call it volume.
So you want proof, huh? No problem:
The First Law of Thermodynamics
This law states that the change in the total energy of a system is equal to the change in the amount of work done by the system minus the amount of heat generated by the system:
dE=dW-dQ
dE = change in total energy of a system
dW = change in work done by the system
dQ = change in heat generated by the system
(Now, for you physics or engineering types, I realize that this equation is generally a partial differential equation. We are simplifying the analysis greatly… )
Now, this is a little calculus and I am making it extremely basic.
Okay, if we say that the change in the energy in a person is going to be zero (we aren’t eating any food at the moment and heat lost due to radiation, convection, and conduction is zero).
By making these assumptions, we can say:
0=dW-dQ or dW~dQ (~ means “is proportional to”)
So, we can say that the change in work done (lifting) is proportional to the change in heat generation. Since heat generation is directly proportional to the amount of calories burned, we can say that the change in the amount of calories burned is proportional to the change in the amount of work done by a person.
Of course, if we say that we aren’t doing any work or burning any calories due to working out at the very instant we start to exercise, we can say that the amount of calories burned at the end of our weight training is proportional to the total amount of work done during the workout.
If you remember from 9th grade science:
Work = Force x Distance (US units)
So, our key is to maximize the amount of work done during weight training. If you use a weight of 20 lbs and can do a maximum of 20 repetitions (let’s say the weight moves 2 ft up and down during a repetition). In this example our work done equals 800 lb-ft of work done (20lbs X 40ft)
What if we go heavier, say 40 lbs and we can do that 12 reps (40lbs x 24ft = 960lb-ft)?
What if we go even heavier, say 65 lbs and we can do 8 reps (65lbs X 16ft = 1040lb-ft)?
Even heavier, 80 lbs, 4 reps (80lbs X 8ft = 640 lb-ft).
In this example, we can see that the 65 lb weight actually allows us to perform the most work; and, for calorie burning purposes, should be the weight we work with (after warming up correctly, of course).
A note on “toning”
It’s probably the biggest crock ever. Most people only try to “tone” when they exercise for fear of their muscles growing uncontrollably. It’s not easy getting big, trust me. If it was, every person you see in a health club would be large. Gaining a significant amount of muscle mass takes time, commitment, and a SURPLUS of calories (did I mention we are going to be working with a caloric deficit?).
(end excerpt)
I hope this helps you understand more on how to effectively select a weight for maximum fat loss…
For more great info, check out the Fat Loss Black Book
Here’s another “extreme” video for your viewing pleasure from “Rocky IV”
