Photo by Rodrigo Rodrigo Rodrigo Rodrigo Rodrigo Rodrigo

It’s amazing to me how easy it is to forget to move.

This year was the first time in about 5 years that I found myself gaining weight. It wasn’t a lot, just 5 lbs over 6 months or so, but it was strange for me since I didn’t think I was doing anything different.

I write and think about healthy living all the time, and I absolutely love the food I eat. I no longer crave sugar, and avoiding it isn’t hard. If anything I have eaten healthier than ever during this time, since I started working at home and control 100% of my meals. I’ve been eating the same or better quality food than I always have, and have even improved on my mindful eating techniques.

So what gives?

I didn’t think the problem was exercise, since I still go to the gym 4-6 days a week. My workouts have actually gotten better, and I’ve noticed welcome improvements in several aspects of my physique (thank you kettlebell!). I wasn’t upset about how I looked, I had just gotten slightly larger and didn’t know why.

Then about 6 weeks ago I figured it out: I had stopped walking.

When I was still in my PhD program I had a substantial walk to work, at least a mile each way if I took the campus shuttle, and about 2.5 miles each way if I walked the whole distance (I did this rarely, but tried to squeeze it in when I could). I also worked in the lab, running back and forth between rooms and up and down stairs to get equipment. Though I came home each evening and worked on Summer Tomato until the wee hours of the morning, I was not sedentary.

Even during my brief stint in the corporate world after graduation I had a walking commute to work. But after I quit in January I just stayed at home writing. At first I had a standing desk/table I was using, but logistics and a problematic elbow forced me to move to the coffee shop across the street where most of my work gets done now. This sedentary shift correlates exactly with when I noticed my pants getting tighter.

What’s crazy to me is that this amount of exercise seems so inconsequential it doesn’t even register in my brain until months after the change has occurred. And it’s not like I never think about this stuff, I noticed when I first started walking that I effortlessly dropped weight. How could I forget that non-exercise activity (NEAT) is so important?

It’s easy to forget, but this is good news. It means that it is not a chore to burn more calories—in fact, you will hardly notice. All you need to do is make an effort to be a little more active throughout the day, and work to build more activity into your daily routine.

To solve my problem, I turned to my puppy Toaster. He needs to get out and walk a few times a day, so I thought why not improve both of our lives by making a daily pilgrimage to the bigger, better park that’s about a mile from the house instead of the smaller, dirtier park that is closer and more convenient? He gets more exercise and behaves better, I get my walk in, and we both have more fun. Win-win.

I’m happy to report that my pants are fitting better again.

If you don’t have a dog, there are plenty of other ways to move more. Avoid elevators and escalators, walk to lunch or between floors in your building, do chores more enthusiastically at home and park further away in the parking lot. Just standing up more can make a difference. These things add minuscule amounts of time to your tasks but add up significantly for your health.

Unlike structured, high-intensity exercise, walking and other low-intensity movements don’t make you hungrier. There’s good evidence that increasing your daily activity can burn hundreds of extra calories each day and may be one of the most effective ways to impact your energy balance (i.e. burn more without eating more). Importantly, non-exercise activity correlates with body weight in obese as well as normal weight individuals, so everyone can benefit from extra movement.

Even if you already work out regularly you should still strive for additional daily activity. Amazingly, high-intensity exercise doesn’t lower your inclination toward NEAT, but raises it. In one study, scientists measured NEAT 3 days before and 3 days after overweight individuals performed either moderate or high-intensity exercise. There was no measurable change in NEAT until the third day after exercise, when it increased 17% after moderate activity and 25% after intense activity. That’s impressive.

When you’re as busy as I am, it’s easy to make excuses about why extra effort is impossible. But adding a little extra movement to your normal, daily activities is far and away the easiest way to lose weight and improve your health, so why not?

I’ve also found a substantial meditative value in incorporating more physical activity. Several of my most complex problems have been solved during my walks and I’ve been plowing through podcasts and audiobooks, which I swear makes me smarter (I’m currently loving The Social Animal, by David Brooks). Your brain truly appreciates a break from the screen.

Ironically, it took noticing that I was “reading” less to make me examine what was different in my life—I realized I was listening to fewer audiobooks because I was walking less, and put 2 and 2 together. Problem solved.

It’s easy to be lazy and just wait for the elevator with everyone else, even though you know the time it saves you is insignificant. But today I hope I’ve convinced you that it’s worth resisting that urge and making an effort to be more active. Try making it a game or competing with your friends using pedometers like the FitBit for extra motivation.

What will it take to get you moving?

Tags: dogs, Exercise, NEAT, Toaster, walking

By regelzamora

Today’s guest post is by Travis Saunders, MSc, Certified Exercise Physiologist. Travis and his colleague Peter Janiszewski, Ph.D, MSc, are both PhD trained scientists who have a fantastic blog over at PLoS Blogs, Obesity Panacea.

While Summer Tomato is more food-centric, Obesity Panacea focuses on exercise and physiology.  Perfect match, right?

I asked Travis if he would be kind enough to write a post on how to get more exercise without having to actually go to the gym (NEAT), something both busy and lazy people alike can appreciate.

Personally I’m a big believer in NEAT. A year and a half ago I stopped taking BART to work and started walking instead. To my surprise this added only 5 minutes to my commute time and is infinitely more enjoyable.

Even though I already logged 4-6 regular cardio and strength training workouts per week, this added mileage caused me to drop another 3-5 lbs that has never come back. It also gives me time to listen to my favorite podcasts!

But what is NEAT exactly? For that I’ll turn the mic over to Travis.

Non-Exercise Activity Thermogenesis – It’s NEAT!

by Travis Saunders

For decades, we have been told of the benefits of physical activity, and with good reason – regardless of body weight, people who exercise live longer, healthier lives than people who don’t exercise.

In the past, the focus has been on performing structured sessions of moderate or vigorous exercise (e.g. 30-60 minutes of aerobic exercise on a bike or treadmill).

While intense physical activity has a tremendous health impact, a growing body of evidence suggests that accumulating short bouts of low-intensity physical activity throughout the day can also have substantial health benefits, which may even rival those associated with more vigorous sessions.  This low-intensity physical activity is known as non-exercise activity thermogenesis, or NEAT.

The concept of NEAT was proposed by Dr James Levine, who defines it as:

“…the energy expenditure of all physical activities other than volitional sporting-like exercise. NEAT includes all those activities that render us vibrant, unique and independent beings such as dancing, going to work or school, shoveling snow, playing the guitar, swimming or walking in the modern Mall.”

I can understand why some people would be skeptical that activities like gardening or mall walking could have a measurable impact on health.  After all, those things aren’t exercise, right?

Fortunately, it turns out that the body doesn’t care whether those activities are exercise.  James Levine’s work has shown that NEAT burns an average of 330 calories per day in healthy individuals (and up to nearly 700 calories/day in some people!), and that obese individuals perform drastically less NEAT than their lean counterparts.

Levine has also made convincing arguments that NEAT could burn up to 1000 calories per day when properly incorporated throughout the work day.  These results suggest that NEAT can burn a tremendous amount of calories, which has obvious implications for weight maintenance and obesity prevention.

But the other key benefit to increased NEAT is that it reduces sedentary time, itself a strong predictor of both death and disease.

Independent of total physical activity levels and other risk factors like abdominal obesity, recent evidence suggests that time spent being sedentary (e.g. sitting or lying down) is a strong predictor of metabolic risk, as well as mortality.  This means that regardless of how much they exercise, people who spend more time sitting are at a higher risk than those who sit less.

New research has even shown that merely taking more frequent breaks from sedentary activities (e.g. standing up) is also associated with reduced metabolic risk and abdominal fat levels.  The reasons for these associations are still being worked out (it probably is to due to changes in LPL and glucose transporter protein activity in skeletal muscle, which are altered by even short bouts of inactivity), but the findings are consistent and have been observed in both adults and children.  Since NEAT includes activities like standing and walking, any increases in NEAT will obviously result in reductions in time spent in sedentary activities.

So, how can you reduce your time spent being sedentary and increase your NEAT levels?  Luckily, it’s not very hard.

Here is a brief list, and for more suggestions, please read “10 Ways to Become More Active”, which can be found on Obesity Panacea.

6 Ways To Get More NEAT

1. Buy a Pedometer

Pedometers are beeper-sized devices which are worn on the waist and keep track of the number of steps taken each day.  They are cheap (a good one costs about $20), and are a great way to assess your level of NEAT.  Each week, try to increase your daily step count by 1,000 steps/day, with a goal of reaching at least 10,000 steps per day.  Friendly step-count competitions with co-workers can also be surprisingly fun, and are a great way to promote increased physical activity within the office environment.

2. Take the Stairs

This one is obvious.  I can’t tell you how often I see people taking the elevator up or down one single floor.  It doesn’t save any time, and it deprives people of physical activity.  You don’t have to walk up twenty flights of stairs to make this worthwhile – try to walk up at least one flight, and down at least two, and build up to more flights as you feel up to it.  If you have to go further than you can walk comfortably, take the elevator the rest of the way.

3. Active Transportation

Walk or bike to work and when performing errands whenever possible.  If that is not an option, consider taking public transportation, which almost always involves a short walk at both ends of the trip.  And if you absolutely have to drive, park as far from the door as possible.  It might only add 5 minutes of walking to your day, but that’s 5 minutes you wouldn’t get otherwise.

4. Drink Plenty of Water

This sounds odd, but it’s a trick that I’ve been using for years. If you are constantly sipping water throughout the day, you are going to have to pee at least once every couple hours. Every time you have to pee, you have a guilt-free excuse to go for a 5-minute walk to the washroom and back! To crank it up a notch, use a washroom in another part of your building, which may give you an opportunity to use the stairs as well.  It’s easy to forget to take a 5-minute walk-break every hour, but it’s impossible to forget to go pee.

5. Have “Walk” Meetings

These types of meeting are becoming increasingly popular at my workplace.  Think of all the times that you need to have a 5-10 minute chat with another co-worker or superior.  Instead of doing it at your desk (and potentially annoying your colleagues), why not talk while casually strolling down the hall?  This is another great way to accumulate activity without even noticing that it’s happening.

6. Walk During Your Lunch Break

If you are one of those lucky individuals who has a daily lunch break, why not use it for a short walk?  A ten or twenty minute walk on a daily basis can add up over time, and you’ll almost certainly feel better than if you spent your whole break sitting at your desk.

These are only a few examples, but I hope they illustrate how easy it can be to incorporate more NEAT into your daily life.  Give it a shot, and good luck with your healthstyle!

Let’s have a big round of applause for Travis!

Originally published at Summer Tomato on October 19, 2009

Tags: Exercise, fitness, guests, NEAT, Obesity Panacea, Travis Saunders

Romanesco Broccoli in a Beaker

One of the most consistent themes of nutrition science is that vitamin supplements (pills, powders, liquids, etc.) are almost never able to mimic the beneficial effects of foods that contain the same vitamins. Now new evidence suggests that high doses of these antioxidant supplements–but not whole foods containing them–may actually block the beneficial effects of exercise on insulin sensitivity and metabolism.

Exercise has countless benefits for people of all levels of fitness. One of the most important of these is its ability to improve insulin sensitivity and increase metabolism. For this reason, exercise is considered among the most effective ways to protect against type 2 diabetes.

One of the byproducts of exercise, however, is the production of free radicals that results from the breakdown of oxygen in the muscles. These reactive oxygen molecules can damage cells and DNA, and are implicated in many chronic diseases. Since antioxidants can easily neutralize these reactive oxygen molecules, it has been assumed that antioxidants such as vitamins C and E could only benefit the body.

A new study published in the Proceedings of the National Academy of Sciences suggests that rather than help protect against oxidative damage from exercise, high doses of antioxidant supplements may actually hinder the body’s natural protection against oxidative damage and block exercise-induced metabolic benefits.

In the study, human subjects were given either placebo or 500 mg vitamin C twice per day and 400 IU vitamin E. They were then trained in both cardio and strength training workouts at the gym for 5 consecutive weekdays, 4 weeks in a row. This trial was performed on both previously trained and untrained individuals.

Metabolic rates were tested by blood sample both before the trial and after 1 and 4 weeks of training. Muscle biopsies were taken both before and after the trial for all participants. Several measures of metabolism and insulin sensitivity were measured including plasma glucose concentrations, plasma insulin concentrations, maximal oxygen uptake (VO₂ max), as well as several molecular markers in muscle that are linked to insulin sensitivity and are known to promote the body’s natural defense against oxidative damage.

The researchers found that exercise improved measures of insulin sensitivity in all individuals except those given antioxidant supplements. Also, molecules that protect against oxidative damage are upregulated in response to training, but not when antioxidants are administered.

Previous studies suggest that the body’s natural defenses against oxidative damage require activation by a small amount of reactive oxygen chemicals in the body. These same chemicals have been shown to mediate insulin sensitivity in muscles, and in this study both were shown to be blocked by high antioxidant administration.

The researchers suggest that small doses of reactive oxygen molecules such as the amounts produced by exercise are necessary to induce the body’s natural defense against oxidative damage, and that this process is essential for mediating exercise-induced insulin sensitivity. If this is true it could mean that some (but not all) of the metabolic benefits of exercise could be limited by taking high doses of vitamin supplements. This may be particularly important to individuals at high risk for type 2 diabetes.

Interestingly, foods that contain high levels of these antioxidants have previously been shown to be protective against type 2 diabetes. Although the reason for this is still unknown, the authors suggest the benefit is unlikely due to the antioxidant content of the foods and may depend on other factors.

Even if we do not understand the reason vegetables and fruits are the best source of nutrition, we can still enjoy all their benefits. If you choose to continue taking vitamin supplements, it is advisable to stick to a basic multivitamin that does not contain megadoses of one particular nutrient.

Do you take vitamin supplements? Why? How much do you take?

Tags: antioxidants, insulin, insulin sensitivity, metabolism, PNAS, Synapse, type 2 diabetes, vitamin C, vitamin E, workout

High blood sugar levels are known to accelerate aging and decrease longevity in many different species. Now it seems blood sugar may also be tied to how well you keep your memory as you age.

A new study published in the December issue of the Annals of Neurology examined the effect of high blood sugar on the region of the brain responsible for memory formation, the hippocampus. Researchers examined patients with either diabetes or stroke (in other, non-hippocampus, parts of the brain) and determined that both groups had defects in the hippocampus compared to normal patients, but the problems were in different hippocampal subregions.

What does this mean for you?

Tags: Annals of Neurology, blood sugar, memory

A recent New York Times article questions the conventional wisdom of the value of stretching before a workout. Instead, the best way to prepare for physical exertion is a brief, easy cardio workout followed by a series of sport-specific movements designed to loosen joints and increase blood flow to the muscles you will be using.

Multiple research studies over the last several decades have shown that stretching does not help prevent injury during a workout. Even more surprising is that stretching appears to actually weaken the muscle for a period of up to 30 minutes following the stretch, thereby hurting overall performance.

But this does not mean you should skip your workout warm up. Scientists now recommend that you begin your workout with a light, 5-10 minute aerobic exercise, such as a jog. This movement will increase blood flow to your muscles and make them more pliable and ready for additional exertion.

To improve performance in a specific sport, dynamic stretching is recommended. Dyamic stretching is a way to stretch muscles while moving, a practice that actually does appear to increase muscle power, flexibility and range of motion. Data is also emerging that it reduces risk of injury.

The goal of dynamic stretching is to perform “range-of-motion exercises that activate all of the joints and connective tissue that will be needed for the task ahead,” says Team Running USA coach, Terrence Mahon. For example, runners should do movements that activate hip and knee joints (such as squats and lunges), while golfers should perform shoulder and back movements.

That’s right, even golfers can improve performance with dynamic stretching.

A few of the best dynamic stretches are described in the article.

In sum, the new recommendation for beginning a workout is an easy, 5-10 minute aerobic exercise followed by a five minute recovery, and then a series of dynamic stretches appropriate for your sport. It is important that you complete this warm up immediately before you begin your training. Waiting too long (30 minutes) before beginning your workout can be detrimental, increasing muscle stiffness.

Although I read and believe the accuracy of this story, I think it will be hard for me to stop touching my toes and hanging my heels off a stair before going on a run. It is such a regular part of my routine and feels so natural. But according to this article that may actually be hurting my run.

What do you guys think?

Tags: New York Times, stretching