Ralph S. Paffenbarger, MD, was an internationally known exercise authority and professor emeritus of health research and policy at the Stanford University School of Medicine. He died recently at age 84. Using Harvard alumni data, Paffenbarger published an oft-cited study in 1986 showing that men who burned at least 2,000 calories a week through exercise had death rates one-quarter to one-third lower than those the same age that were sedentary. This was no jive study designed to reach a predetermined conclusion in order to sell supplements or fitness related products (as is nearly always the case in this day and age), this was real research carried on over decades involving 16,000 + participants. Paffenbarger, who published hundreds of papers on the relationship between exercise and longevity, is perhaps best known for this particular study. It showed that higher levels of physical fitness resulted in lowered risk of heart disease and a marked decrease in death rates.
Paffenbarger examined the physical activity (and other life-style characteristics) of 16,936 Harvard alumni, aged 35 to 74, for rates of mortality from all causes. Rates were one third lower among alumni expending 2000 or more kcal during exercise per week compared to less active men. Burning 2,000 calories a week during exercise is no small feat as people vastly overestimate the number of calories expended during exercise. The number of calories expended by a 'normal person' during a normal workout is usually in the 100 to 250 calorie range. In order to burn off 2,000 in a week an individual needs to really work hard during training and train often. Easy training, sub-maximal training, low intensity training, makes it nearly impossible to hit the magic 2,000 calorie weekly number. Exercise reality is a hard slap across the face: if you are not breathing hard, if you are not breaking a sweat during an exercise session (regardless the exercise mode), it is highly unlikely that you are oxidizing calories at greater than 10 calories per minute. It takes 200 cumulative minutes, three hours and twenty minutes, working at 10 calories per minute burn rate to hit 2,000 cumulative calories.
To burn calories at a significant rate, exercise needs to be taxing, extended and intense. It would be terrific to sit on a comfortable stationary bike, tool along at a comfortable pace while talking comfortably to our neighbor and burn calories at a 20 calorie per minute rate; why, if such a thing were possible you could oxidize 600 calories in 30 short minutes and not even have to shower afterwards. In reality, a moderate 30 minute cardio session burns calories at a paltry 5-8 calorie per minute rate - and that's the burn rate for a big guy; smaller individuals have to work even harder to achieve a similar caloric burn rate. Mild exercise burns calories at a slow and relatively insignificant rate. In order to burn off 2,000 calories per week, via exercise alone, you really need to put out in your training sessions and frankly, if you aren't sweating, consistently and profusely, you'll never attain a really significant calorie-per-minute burn rate. A moderately paced aerobic session done below the 'sweat level,' a gentle Pilates class, a light resistance session, might burn calories at the rate of 5 to 7 calories per minute.
Assuming you burn 7 calories per minute, a 30 minute session would result in a mere 200 calorie expenditure. To attain the life-extending 2,000 calories per week, you would need to perform TEN 30 minute exercise sessions every seven days. The burn rate for popular exercise modes such as the aforementioned sub-sweat cardio, yoga, tai chi, body shaping, or nice-and-easy weight training are all calorically inconsequential. The bad news gets worse for lighter and smaller people. Caloric expenditure is directly tied to bodyweight: it takes a lot more fuel (calories) to propel a massive SUV for thirty minutes down a flat stretch of highway than it takes to propel a smaller vehicle getting better gas mileage for the same time and distance over identical terrain. A 125 pound man has to work roughly twice as hard as a 250 pound man to burn off an equal number of calories doing the same work in the same amount of time. This is simple thermodynamics. A challenging thirty minute exercise session for a 200 pound man in reasonable shape will typically burn 300 to 400 calories. This represents a 10 to 13 calorie per minute sustained burn rate and requires real effort. The 125 pound person seeking to oxidize 300 to 400 calories would have to exercise longer using the same pace - or dramatically increase the exercise intensity to match the big man's rate of caloric burn.
A fit 200 pound man can break 500 calorie barrier by working for 30 minutes at a blistering 16.67 calorie-per-minute rate. Standard weight training, even intense weight training is not a great calorie oxidizer. This is on account of the rest periods needed to recover between sets. While the athlete's heart rate might spike up to 170 + beats per minute after a limit set of squats or deadlifts, the start/stop nature of intense weight training makes it a good, but hardly a great, caloric oxidizer. There is, however, one type of weight training that is actually a superior calories oxidizer: kettlebell lifting done using the Pavel Protocol. Sustained and intense kettlebell lifting turns out to be a terrific caloric oxidizer, generating tremendous calorie-per-minute burn rates. One of my many "phone train" students is a hardcore K-Bell trainee named Jim Skislak. Jim is hard at work preparing for his certification coming up this June. I decided to strap Jim up to a Polar F4 heart rate monitor in order to see how many calories he was burning during his numerous weekly sessions. Jim is 51 years old, stands well over 6 foot and weighs 210 pounds; he wears his heart rate monitor from start to finish of each session. Here are snapshots of two recent Ski workouts ...
7am: Cardio (Medium / High Intensity session)
50 Bodyweight Squats for warm-up then...
Two hand swings using a 24 kilo bell
35 seconds of work then 35 seconds of rest for 35 cumulative sets
I used a lighter bell, 53-pouns, as Pavel advised, and upped the volume. In this session I did 700 swings to extend the length of this cardio session.
Total swings: 700
Total Volume: 37,100 lbs.
Session duration: 49min.
Intensity: Medium to High
My average heart rate was 146 beats per minute which equates to 86.3% of my age-related heart rate maximum.
I oxidized 14.3 calories per minute for 49 consecutive minutes
Total Calories Oxidized: 704
Now this was no special workout - just another day at the kettlebell office for this hardcore K-Bell lifter. Here is a 'short workout' Ski performed later that same week: in a mere 25 minutes he burned just shy of 400 calories, blasting along at a blistering 15.4 calorie per minute burn rate.
7am: High Intensity session
Two hand swing: 24 k bell; 35 seconds of work; 35 seconds of rest for seven sets
Two hand swing: 28 k bell; 35 seconds of work; 35 seconds of rest for seven sets
Two hand swing: 32 k bell; 35 seconds of work; 35 seconds of rest for seven sets
Total swings: 420
Total Volume: 22,200 lbs.
Duration: 25 min.
Intensity: High
My average heart rate: 152 beats per minute which equates to 90% of my age-related heart rate maximum
I oxidized15.4 calories oxidized per minute for 25 consecutive minutes
Total Calories Oxidized: 390
In two workouts totaling 74 minutes (one hour and fourteen minutes) Ski oxidized 1,100 calories. This is profound and revealing: if you are going to the local commercial gym, engaging in mild cardio and moderate progressive resistance training, perhaps it is time to 'up your game' and switch to some high-intensity weight training and high intensity kettlebell lifting. There is irrefutable science to suggest that oxidizing 2,000 per week can extend a man's life by 10-15 years. The fastest way, the most effective way and the most expeditious way to burn those 2,000 calories is to exercise intensely. No better calorie burning mode exists than serious kettlebell slinging. I am quite sure that were he alive Dr. Ralph S. Paffenbarger would agree.
Interested in taking your body and your capacities to the next level?
Contact Marty Gallagher about becoming a 'phone train' client. MGSO@EMBARQMAIL.COM
