BONUS Challenge: Get Movin'! (The Mile Challenge)

"Eat your fruits and vegetables" is one of the tried and true recommendations for a healthy diet. And for good reason. Eating plenty of vegetables and fruits can help you ward off heart disease and stroke, control blood pressure, prevent some types of cancer, avoid a painful intestinal ailment called diverticulitis, and guard against cataract and macular degeneration, two common causes of vision loss.
Q. What counts as a cup of vegetables and fruits?
A. For most fresh or cooked vegetables and fruits, 1 cup is just what you would put in a household measuring cup. There are two main exceptions to that rule: For lettuce and other raw leafy greens, you need to eat 2 cups to get the equivalent of 1 cup of vegetables. For dried fruit, you only need to eat ½ cup to get the equivalent of 1 cup of fruit.
Remember—on the Healthy Eating Pyramid, created by the Department of Nutrition at the Harvard School of Public Health, potatoes are not counted as a vegetable, since they are mostly starch and should be used sparingly.
What does "plenty" mean? More than most Americans consume. If you don't count potatoes—which should be considered a starch rather than a vegetable—the average American gets a total of just three servings of fruits and vegetables a day. The latest dietary guidelines call for five to thirteen servings of fruits and vegetables a day (2½ to 6½ cups per day), depending on one's caloric intake. (1) For a person who needs 2,000 calories a day to maintain weight and health, this translates into nine servings, or 4½ cups per day (2 cups of fruit and 2½ cups of vegetables).
Over the past 30 years or so, researchers have developed a solid base of science to back up what generations of mothers preached (but didn't always practice themselves). Early on, fruits and vegetables were acclaimed as cancer-fighting foods. In fact, the ubiquitous 5 A Day message (now quietly changing to Fruits and Veggies: More Matters) seen in produce aisles, magazine ads, and schools was supported in part by the National Cancer Institute. The latest research, though, suggests that the biggest payoff from eating fruits and vegetables is for the heart.
There is compelling evidence that a diet rich in fruits and vegetables can lower the risk of heart disease and stroke.
The largest and longest study to date, done as part of the Harvard-based Nurses' Health Study and Health Professionals Follow-up Study, included almost 110,000 men and women whose health and dietary habits were followed for 14 years. The higher the average daily intake of fruits and vegetables, the lower the chances of developing cardiovascular disease. Compared with those in the lowest category of fruit and vegetable intake (less than 1.5 servings a day), those who averaged 8 or more servings a day were 30 percent less likely to have had a heart attack or stroke. (2) Although all fruits and vegetables likely contribute to this benefit, green leafy vegetables such as lettuce, spinach, Swiss chard, and mustard greens; cruciferous vegetables such as broccoli, cauliflower, cabbage, Brussels sprouts, bok choy, and kale; and citrus fruits such as oranges, lemons, limes, and grapefruit (and their juices) make important contributions. (2)
When researchers combined findings from the Harvard studies with several other long-term studies in the U.S. and Europe, and looked at coronary heart disease and stroke separately, they found a similar protective effect: Individuals who ate more than 5 servings of fruits and vegetables per had roughly a 20 percent lower risk of coronary heart disease (3) and stroke, (4) compared with individuals who ate less than 3 servings per day.
High blood pressure is a primary risk factor for heart disease and stroke. As such, it's a condition that is important to control. Diet can be a very effective tool for lowering blood pressure. One of the most convincing associations between diet and blood pressure was found in the Dietary Approaches to Stop Hypertension (DASH) study. (5)
This trial examined the effect on blood pressure of a diet that was rich in fruits, vegetables, and low-fat dairy products and that restricted the amount of saturated and total fat. The researchers found that people with high blood pressure who followed this diet reduced their systolic blood pressure (the upper number of a blood pressure reading) by about 11 mm Hg and their diastolic blood pressure (the lower number) by almost 6 mm Hg—as much as medications can achieve.
More recently, a randomized trial known as the Optimal Macronutrient Intake Trial for Heart Health (OmniHeart) showed that this fruit and vegetable-rich diet lowered blood pressure even more when some of the carbohydrate was replaced with healthy unsaturated fat or protein. (6)
Numerous early studies revealed what appeared to be a strong link between eating fruits and vegetables and protection against cancer. But because many of these were case-control studies, where people who already have a certain health outcome (cases) are compared to people who do not have that outcome (controls), it is possible that the results may have been skewed by problems inherent in these types of studies; people with illnesses, for example, often recall past behaviors differently from those without illness, which can lead to potential inaccuracy in the information that they provide to study investigators.
Cohort studies, which follow large groups of initially healthy individuals for years, generally provide more reliable information than case-control studies because they don't rely on information from the past. And data from cohort studies have not consistently shown that a diet rich in fruits and vegetables prevents cancer in general. For example, in the Nurses' Health Study and the Health Professionals Follow-up Study, over a 14-year period, men and women with the highest intake of fruits and vegetables (8+ servings a day) were just as likely to have developed cancer as those who ate the fewest daily servings (under 1.5). (2)
A more likely possibility is that some types of fruits and vegetables may protect against certain cancers. A massive report by the World Cancer Research Fund and the American Institute for Cancer Research suggests that non-starchy vegetables—such as lettuce and other leafy greens, broccoli, bok choy, cabbage, as well as garlic, onions, and the like—and fruits "probably" protect against several types of cancers, including those of the mouth, throat, voice box, esophagus, and stomach; fruit probably also protects against lung cancer. (7)
Specific components of fruits and vegetables may also be protective against cancer. For example, a line of research stemming from a finding from the Health Professionals Follow-up Study suggests that tomatoes may help protect men against prostate cancer, especially aggressive forms of it. (8) One of the pigments that give tomatoes their red hue—lycopene—could be involved in this protective effect. Although several studies other than the Health Professionals study have also demonstrated a link between tomatoes or lycopene and prostate cancer, others have not or have found only a weak connection. (9) Taken as a whole, however, these studies suggest that increased consumption of tomato-based products (especially cooked tomato products) and other lycopene-containing foods may reduce the occurrence of prostate cancer. (7) Lycopene is one of several carotenoids (compounds that the body can turn into vitamin A) found in brightly colored fruits and vegetables, and research suggests that foods containing carotenoids may protect against lung, mouth, and throat cancer. (7) But more research is needed before we know the exact relationship between fruits and vegetables, carotenoids, and cancer.
One of the wonderful components of fruits and vegetables is their indigestible fiber. As fiber passes through the digestive system, it sops up water like a sponge and expands. This can calm the irritable bowel and, by triggering regular bowel movements, can relieve or prevent constipation. (10) The bulking and softening action of insoluble fiber also decreases pressure inside the intestinal tract and so may help prevent diverticulosis (the development of tiny, easily irritated pouches inside the colon) and diverticulitis (the often painful inflammation of these pouches). (11)
Eating plenty of fruits and vegetables also keeps your eyes in good shape. You may have learned that the vitamin A in carrots aids night vision. Other fruits and vegetables help prevent two common aging-related eye diseases—cataract and macular degeneration—which afflict millions of Americans over age 65. Cataract is the gradual clouding of the eye's lens, a disk of protein that focuses light on the light-sensitive retina. Macular degeneration is caused by cumulative damage to the macula, the center of the retina. It starts as a blurred spot in the center of what you see. As the degeneration spreads, vision shrinks.
Free radicals generated by sunlight, cigarette smoke, air pollution, infection, and metabolism cause much of this damage. Dark green leafy vegetables—such as spinach and kale—contain two pigments, lutein and zeaxanthin, that accumulate in the eye; these pigments are found in other brightly colored fruits and vegetables as well, including corn, squash, kiwi, and grapes. (12) These two pigments appear to be able to snuff out free radicals before they can harm the eye's sensitive tissues. (13)
In general, a diet rich in fruits and vegetables appears to reduce the chances of developing cataract or macular degeneration. (14–17) Lutein and zeaxanthin, in particular, seem protective against cataract. (18)
Vegetables and fruits are clearly an important part of a good diet. Almost everyone can benefit from eating more of them, but variety is as important as quantity. No single fruit or vegetable provides all of the nutrients you need to be healthy. The key lies in the variety of different vegetables and fruits that you eat.
Try these tips to fit more fruits and vegetables into your day:
1. 2005 Dietary Guidelines for Americans. Center for Nutrition Policy and Promotion, U.S. Department of Agriculture.
2. Hung HC, Joshipura KJ, Jiang R, et al. Fruit and vegetable intake and risk of major chronic disease. J Natl Cancer Inst. 2004; 96:1577–84.
3. He FJ, Nowson CA, Lucas M, MacGregor GA. Increased consumption of fruit and vegetables is related to a reduced risk of coronary heart disease: meta-analysis of cohort studies. J Hum Hypertens. 2007; 21:717–28.
4. He FJ, Nowson CA, MacGregor GA. Fruit and vegetable consumption and stroke: meta-analysis of cohort studies. Lancet. 2006; 367:320–26.
5. Appel LJ, Moore TJ, Obarzanek E, et al. A clinical trial of the effects of dietary patterns on blood pressure. DASH Collaborative Research Group. N Engl J Med. 1997; 336:1117–24.
6. Appel LJ, Sacks FM, Carey VJ, et al. Effects of protein, monounsaturated fat, and carbohydrate intake on blood pressure and serum lipids: results of the OmniHeart randomized trial. JAMA. 2005; 294:2455–64.
7. World Cancer Research Fund, American Institute for Cancer Research. Food, Nutrition, Physical Activity, and the Prevention of Cancer: a Global Perspective. Washington DC: AICR, 2007.
8. Giovannucci E, Liu Y, Platz EA, Stampfer MJ, Willett WC. Risk factors for prostate cancer incidence and progression in the Health Professionals Follow-up Study. Int J Cancer. 2007; 121:1571–78.
9. Kavanaugh CJ, Trumbo PR, Ellwood KC. The U.S. Food and Drug Administration's evidence-based review for qualified health claims: tomatoes, lycopene, and cancer. J Natl Cancer Inst. 2007; 99:1074–85.
10. Lembo A, Camilleri M. Chronic constipation. N Engl J Med. 2003; 349:1360–68.
11. Aldoori WH, Giovannucci EL, Rockett HR, Sampson L, Rimm EB, Willett WC. A prospective study of dietary fiber types and symptomatic diverticular disease in men. J Nutr. 1998; 128:714–19.
12. Sommerburg O, Keunen JE, Bird AC, van Kuijk FJ. Fruits and vegetables that are sources for lutein and zeaxanthin: the macular pigment in human eyes. Br J Ophthalmol.1998; 82:907–10.
13. Krinsky NI, Landrum JT, Bone RA. Biologic mechanisms of the protective role of lutein and zeaxanthin in the eye. Annu Rev Nutr. 2003; 23:171–201.
14. Brown L, Rimm EB, Seddon JM, et al. A prospective study of carotenoid intake and risk of cataract extraction in US men. Am J Clin Nutr. 1999; 70:517–24.
15. Christen WG, Liu S, Schaumberg DA, Buring JE. Fruit and vegetable intake and the risk of cataract in women. Am J Clin Nutr. 2005; 81:1417–22.
16. Moeller SM, Taylor A, Tucker KL, et al. Overall adherence to the dietary guidelines for Americans is associated with reduced prevalence of early age-related nuclear lens opacities in women. J Nutr. 2004; 134:1812–19.
17. Cho E, Seddon JM, Rosner B, Willett WC, Hankinson SE. Prospective study of intake of fruits, vegetables, vitamins, and carotenoids and risk of age-related maculopathy. Arch Ophthalmol. 2004; 122:883–92.
18. Christen WG, Liu S, Glynn RJ, Gaziano JM, Buring JE. Dietary carotenoids, vitamins C and E, and risk of cataract in women: A prospective study. Arch Ophthalmol. 2008; 126:102–109.
Food group | Servings for a 2,000-calorie-a-day diet | Servings for a 1,600-calorie-a-day diet | Examples of 1 serving |
---|---|---|---|
Fruits | 4 to 5 a day | 4 a day |
|
Vegetables | 4 to 5 a day | 3 to 4 a day |
|
Core exercises: 7 reasons to strengthen your core muscles
You know core exercises are good for you — but do you include core exercises in your fitness routine? Here are seven reasons why you should.
Core exercises are an important part of a well-rounded fitness program. Aside from occasional sit-ups and push-ups, however, core exercises are often neglected. Still, it pays to get your core muscles — the muscles around your trunk and pelvis — in better shape. Check out seven specific reasons to include core exercises in your fitness routine.
1. Core exercises improve your balance and stability
Core exercises train the muscles in your pelvis, lower back, hips and abdomen to work in harmony. This leads to better balance and stability, whether on the playing field or in daily activities. In fact, most sports and other physical activities depend on stable core muscles.
2. Core exercises don't require specialized equipment or a gym membership
Any exercise that uses the trunk of your body without support counts as a core exercise. Abdominal crunches are a classic core exercise. Try lying on your back and placing your feet on a wall so that your knees and hips are bent at 90-degree angles. Tighten your abdominal muscles, then raise your head and shoulders off the floor. Classic push-ups count, too. You can also do push-ups on your knees or standing up against a wall.
3. Core exercises can help tone your abs
Want more defined abdominal muscles? Core exercises are important. Although it takes aerobic activity to burn abdominal fat, core exercises can strengthen and tone the underlying muscles.
Strong core muscles make it easier to do everything from swinging a golf club to getting a glass from the top shelf or bending down to tie your shoes. Weak core muscles leave you susceptible to poor posture, lower back pain and muscle injuries.
You don't have to dedicate hours a day to core exercises. Instead, concentrate on doing each exercise with correct technique and proper form. Gradually build up to 10 to 15 repetitions of each exercise. Also remember to take a break when you need one. If you work your core muscles to fatigue during an exercise session, wait at least a day between workouts to give your muscles time to recover.
Remember, you don't have to trek to the gym to do core exercises. Try them on the floor at home while you're watching your favorite shows. You can even do core exercises with a fitness ball. To do abdominal crunches with a fitness ball, for example, sit on the ball with your feet resting on the floor, about hip-width apart. Cross your arms on your chest, tighten your abdominal muscles and lean back until your abdominal muscles kick in. Hold for three deep breaths, then return to the starting position and repeat.
Aerobic exercise and muscular fitness are the primary elements of most fitness programs — and stretching counts, too. But to have a truly well-rounded fitness program, you should include core exercises in the mix as well. Whether you're a novice taking the first steps toward fitness or a committed fitness fanatic hoping to optimize your results, a well-rounded fitness program is the best way to reach your fitness goals.
Take the Stress Out of Weighing In
Regain Your Power Over the Scale
-- By Dean Anderson, Behavioral Psychology Expert
Does seeing the wrong number on the scale make you crazy? Many people find that a “bad” weigh-in ruins their mood and saps their motivation, making it difficult to keep doing what they know they need to do.
Things don’t need to be this way. You can learn to use the scale as a helpful tool, instead of giving it the power to dictate your feelings and your actions.
Many experts and experienced dieters will tell you that the only realistic way to take the stress out of your weigh-ins is to skip them altogether—or at least keep them to a bare minimum. After all, there are many other ways to measure your progress towards your health and fitness goals, especially since weight loss is rarely predictable or orderly.
Although we talk about weight loss in terms of numbers—calories in versus calories out—your body is not a calculator and it doesn't operate like a checking account. A number of things (like fluctuations in water weight, increased muscle mass, and your body’s anti-starvation mechanism) can and regularly do conspire to make the number on the scale the least reliablemeasure of weight loss success. And if you’re the type of person who needs to see that number coming down on a regular basis in order to avoid frustration, despair and panic, frequent weigh-ins may be exactly what you shouldn’t do.
But let’s face it. Expecting yourself not to weigh-in frequently is like expecting yourself not to scratch when you’ve got an itch. For many of us, it’s just not in the cards. And besides, there are some good reasons to track your weight frequently. Since most of us don’t exactly match the “average” person used in all the formulas for predicting energy expenditure, you may need a little experimentation to find the right combination of calories and exercise that will work for you. Watching the scale as you experiment can be an important part of that process.
So, maybe the real issue here is how you can have your cake and eat it, too. Here are three things you can do to make sure your love-hate relationship with the scale doesn’t cross over the line and become part of the problem instead of part of the solution.
3 Ways to Take the Stress Out of Your Weigh-Ins
1. Be clear with yourself about what that number on the scale really means. That number on the scale only tells you how much you weigh at that moment. It tells you absolutely nothing about what kind of person you are; what life has in store for you; whether or not you’ll ever look the way you want to look or feel the way you want to feel; or how other people see or think about you. If you experience thoughts or feelings like these just because you see an unwelcome number on the scale, then your expectations about what weight loss can do for you need a major overhaul. You may want to take the Is Weight Loss Stressing You Out? quiz to see if you need to do some work on that front—before you paint yourself into a corner you can’t get out of.
2. Remind yourself that you are choosing to use the scale as a weight loss tool. It is NOT your judge, jury and executioner. It’s probably a good idea to post this reminder where you will see it each time you step on the scale. It can help to include a short list of the most important reasons why you are trying to lose weight in the first place, and some of the ways you can measure your progress towards those goals (besides the scale).
3. Use the number on the scale to actually help your program work for you. If you’re going to use the scale as a tool, you might as well do it right. Try keeping a journal (or better yet a computer spreadsheet) where you track your weigh-ins (daily, weekly or monthly), your total calories eaten during that time period (from your Nutrition Tracker) and your calories burned through exercise (from your Exercise Tracker). Once a month, add the numbers up and see if things are going the way they “should” be. Figure out your total calorie deficit for the month, and see if your weight actually behaved according to the "3500-calorie deficit equals one pound lost" formula. If it didn’t, then try to figure out why, using a method like this:
o First, go back to basics. About 90% of the “mysterious” differences between what should happen and what doeshappen can be traced to underestimating calorie intake and/or overestimating calories burned. For the next few weeks, double check yourself on your calorie counting, portion estimating, etc., and make sure you’re not leaving anything out of your nutrition tracking.
o If that doesn’t solve the problem, figure that there may be something wrong with the estimates you are getting for your exercise calorie burning and/or your non-exercise calorie burning (your basal metabolic rate—BMR). Consider investing a little money in a heart rate monitor with a calorie estimating feature to wear during exercise, and/or having your BMR tested at a local gym with a device called the BodyGem (costs about $50). Use this info to adjust your calorie intake and/or your exercise, and see how this new plan works for the next month.
o If all else fails, talk to a dietitian or your doctor to rule out any unusual metabolic problems, or medical issues. But again, 9 times out of 10, it's most likely a simple problem with getting the right numbers.
Above all, keep in mind that it is NOT a lower number on the scale that makes all the work you are putting into your weight loss efforts worthwhile. What makes it worthwhile is the increased happiness and other benefits that come with doing the best you can to eat a healthy diet, being as fit and active as you can, and doing all the other things that make you feel good about yourself. These benefits depend much more on your attitude and the quality of your efforts than on any number you see on a scale.
Shifting your focus from the scale to the quality and consequences of your own attitudes, perspectives, and efforts is the first step in moving from a “diet mentality” (which doesn’t work) to a “lifestyle change” (which can get you where you want to go).