Category Archives: Exercise

What About “The Biggest Loser”?

Dr. Barry Sears (Ph.D., I think) recently wrote about a lecture he attended by a dietitian affiliated with “The Biggest Loser” TV show. She revealed the keys to weight-loss success on the show. Calorie restriction is a major feature, with the typical 300-pounder (136 kg) eating 1,750 calories a day. On my Advanced Mediterranean Diet, 300-pounders get 2,300 calories (men) or 1,900 calories (women).

Although not stressed by Dr. Sears, my impression is that contestants exercise a huge amount.

Go to the link above and you’ll learn that all contestants are paid to participate. In researching my Conquer Diabetes and Prediabetes book, I learned that the actual Biggest Loser wins $250,000 (USD). Also, “The Biggest Loser” is an international phenomenon with multiple countries hosting their own versions, with different pay-off amounts. A former winner, Ali Vincent, lives in my part of the world and still has some celebrity status.

This TV show demonstrates that the calories in/calories out theory of body weight still applies. Including the fact that massive exercise can help significantly with weight loss. In real-world situations, exercise probably contributes only a small degree to loss of excess weight. The major take-home point of the show, for me, is that you can indeed make food and physical activity choices that determine your weight.

Most of us watch too much

I know losing 50 to 10o pounds of fat (25–45 kg) and keeping it off for a couple years is hard; most folks can’t do it. Do you think you’d be more successful if I gave you $250,ooo for your success?

Steve Parker, M.D.

Link to Evidence in Favor of HIIT

Tabata's team used stationary bicycles

I ran across this recent scientific review article on HIIT (high-intensity interval training) and thought you might be interested. Looks like it’s slated for publication in The Journal of Physiology.

I’m interested in HIIT as a means to achieve fitness in much less time than the 150 minutes a week of exercise recommended by various public health authorities.

Why didn’t the authors at least mention the oft-cited and apparently pioneering work of Izumi Tabata et al from 1996?

Steve Parker, M.D.

References:

Gibala et al. Adaptations to low-volume, high-intensity interval training (preliminary draft). Journal of Physiology, doi: 10.1113/jphysiol.2011.224725

Tabata, I., et al. Effects of moderate-intensity endurance and high-intensity intermittent training on anaerobic capacity and VO2max. Medicine and Science in Sports and Medicine, 1996 Oct;28(10):1327-30.

My Fitness

A maximal exercise treadmill stress test is the standard way researchers measure fitness

This is boring.  You should quit reading now.

A few days ago I suggested some baseline measurements to help you keep track of your fitness level, especially if you’re starting or altering an exercise routine. 

I’m starting a new program soon.  Here are my numbers:

  • Weight: 168 lb (76.2 kg)
  • Height: 5 feet, 11.5 inches (181 cm)
  • Body mass index: 23.3
  • Resting heart rate: pending
  • Blood pressure: pending
  • Maximum consecutive push-ups: 30
  • Maximum consecutive pull-ups: 7
  • Maximum consecutive sit-ups (knees bent, forearms folded over chest): 30
  • 1-mile walk/run: 8 minutes, 45 seconds (jogging anywhere from 6 to 8 mph, average about 6.5 mph)
  • Vertical jump (highest point above ground I can jump to touch): 108 and 3/4 inches (276 cm)
  • Waist circumference: 92 cm (standing) or 87 cm (supine)  [big difference, huh?]
  • Biceps circumference: 33 cm (left) and 33.5 (right)
  • Calf circumference: 39.5 cm (left) and 39 cm (right)
  • Toe touch (stand and lock knees, bend over at waist to touch toes): 7.5 inches (19 cm) above ground

    Me around 2007-2008

I was in much better shape a year ago after I finished 15 weeks of Verstegen’s Core Performance.  The most surprising thing about that plan was that I recovered the ability to bend over and touch my toes; I hadn’t done that since my twenties.  I’m 57 now.  Clearly, I’ve regressed since slacking off from Verstegen’s program. 

I was in much worse shape two years ago, thanks to laziness and the resultant sedentary lifestyle. 

Just before the Verstegen program, I’d also developed some bothersome aching in my left shoulder, probably supraspinatous tendinitis.  I cured that with a couple months of rotator cuff strengthening exercises.

So at this point I’m at an average or moderate level of fitness for me.  If my numbers above seem wimpy, remember that I’m 57-years-old.  Hard to be sure, but I’m fairly confident I’m above the 50th percentile for my age group.

I’ll tell you about my new physical activity plan soon.

Steve Parker, M.D. 

Update April 4, 2012:  I added sit-ups today after finding out that the U.S. Army tests soldiers for sit-ups (among other things) twice yearly.

Baseline Measurements Before Starting a Fitness Progam

Impressive jump!

Before beginning or modifying a fitness program, it’s important to take some baseline physical measurements.  Re-measure periodically.  That way you’ll know whether you’re making progress, holding steady, or regressing.  Seeing improvement in the numbers also helps to maintain motivation.   

Not taking measurements would be like starting a weight loss plan without a baseline and subsequent weights.

Around this time last year, I finished a home-based, 15-week, six-days-a-week fitness program called Core Performance, designed by Mark Verstegen.  I was pleased with the results.  The only problem is that it’s very time-consuming.  Perhaps fitness just has to be that way.

I regret that I didn’t take any fitness measurements before and after starting Core Performance.

For much of the last year, I modified Core Performance to a thrice weekly, then twice weekly program, until a couple months ago when I pretty much abandoned it.  I miss the benefits now, but just didn’t want to put in the time to achieve them.  In other words, I lost my motivation.

Who needs this much flexibility?

Intellectually, I know that regular exercise is important.  I’m starting to get motivated again.  Not sure why.  Perhaps because I’ve read that you can be fairly fit with as little as 30 minutes of exercise a week.  I’m not convinced yet.  I’ll be test-driving some of these time-efficient programs soon.

This new style of fitness is promoted by the likes of Dr. Doug McGuff, Chris Highcock, Skyler Tanner, Nasim Taleb,  and Jonathan Bailor, among others.

What to Measure

  1. Weight
  2. Blood pressure
  3. Resting heart rate (first thing in the AM before getting out of bed)
  4. Waist circumference (upright and supine)
  5. Height
  6. Body mass index
  7. Mid-arm circumference, both arms, hanging relaxed at your sides
  8. Maximal calf circumference, both calves, while standing at ease
  9. Maximum number of consecutive pull-ups
  10. Maximum number of consecutive push-ups
  11. Maximum number of consecutive sit-ups
  12. Run/walk one mile as fast as you can
  13. Maximum vertical jump (stand by a tall wall then jump and reach up as high as you can with one arm, noting the highest point above ground your fingers can reach)
  14. Can you touch your toes?  Stand up straight, locking knees in extension, then bend over at your waist and touch your toes with your fingertips.  If you can touch toes, can you flatten your palms against the floor?  If you can’t reach your toes, measure the distance from your fingertips to the floor.
  15. Optional blood work for special situations: fasting blood sugar, hemoglobin A1c, triglycerides, cholesterols (total, HDL, LDL, sub-fractions)

The particular aspects of fitness these measure are strength and endurance in major muscle groups, cardiovascular and pulmonary endurance, a little flexibility, and a hint of body composition. 

You may appreciate an assistant to help you measure some of these.

Record your numbers.  Re-test some or all of these periodically.  If you’re in fairly poor condition at the outset, you’ll see some improved numbers after a couple or three weeks of a good exercise program.  It takes months to build significant muscle mass; you’ll see improved strength and endurance before mass. 

Am I missing anything?

Steve Parker, M.D. 

Update April 4, 2012:  I added the sit-ups today after finding out that’s one of the measurements the U.S. Army monitors in soldiers twice yearly.