Showing posts with label nutrition. Show all posts
Showing posts with label nutrition. Show all posts

Tuesday, November 3, 2009

November is Good Nutrition Month

When most of us think of November, we think of festive fall colors, cooler weather, and of course Thanksgiving.  There are a few other observances this month that involve food and nutrition:  Diabetes Month, Peanut Butter Lover’s Month, and Good Nutrition Month.

What does “Good Nutrition” mean?  In general, it means eating an adequate amount of fruits, vegetables, whole grains, proteins and fats each day (and spread throughout the day) to keep your body healthy.  The exact amounts of each of these groups will vary depending on your current health status, age, weight, and activity level. 

For example, someone who has diabetes has to be very knowledgeable about how many servings of carbohydrates they eat at each meal/snack, as well as making sure each meal/snack is “balanced” so that it includes either protein, or healthy fat, or a lot of fiber with the carbohydrate portion in order to keep blood sugar levels stable.  The timing of meals and snacks for someone with diabetes is also critical; it is much easier to keep blood sugar levels stable if meals and snacks are eaten about the same time each day, and if no more than 5 hours pass between meals. 

For someone with kidney disease, they may have restrictions on how much potassium, phosphorus, and protein they can take in.  A person with celiac has to follow a gluten free diet.  A person who chooses to be vegan has to pay special attention to sources of vitamin D, zinc, vitamin B12, and calcium as these can be low in a poorly planned vegan diet.  An athlete will need to consume many more calories (primarily from carbohydrate) than your average person (for example Tour de France cyclists consume upwards of 6000 calories daily).  These are just a few examples of “specific” areas of nutrition that need to be taken into account for different people in order to make sure they are following “good nutrition” principles. 

For proper brain function and adequate energy levels, we need carbohydrates.  The exact amount is going to vary tremendously for the reasons previously given.  For most people, however, some general rules do apply for our nutrient intake. 

Most people benefit from limiting their saturated fat intake to no more than 10% of total calories, keeping trans fat intake as close to zero as possible (or no more than about 3 grams per day), and eating about 20% of total calories from mono- and polyunsaturated fat.  All of us need to also make sure that some of our polyunsaturated fats include omega 3 and omega 6 fats (these are called essential fats because our bodies cannot make these two fats).  In general, it is recommended that the average person consume at least 1% of their calories from omega 3, and up to 10% of their calories from omega 6.  The best sources of these omega 3 and omega 6 fats are nuts, seeds, avocado, seaweed, seafood, and vegetable oils. 

Most people should also consume at least 25 grams of fiber daily.  Fiber helps keep your cholesterol at normal levels, stabilize blood sugar, give us a sense of fullness (so we do not over eat), and keeps us regular!  We can meet this fiber goal by consuming the following foods daily: at least 5 to 9 servings of fruits and vegetables, 3 servings of whole grains, 1 serving of nuts/seeds.  Consuming legumes (beans) at least 3 times per week can also contribute to our fiber intake. 

As far as protein, most people consume way more protein that they need.  Most people only need about 0.36 grams of protein per pound of body weight.  Athletes do need about twice as much, but even most athletes easily meet their protein needs.  People who have kidney problems will likely be put on a low protein diet. 

We also need to make sure we are drinking an adequate amount of water daily in order to help our body excrete waste products efficiently.  A good indicator that you are drinking enough water is the color of your urine; it should be very pale yellow.  (Be aware that if you are taking a multivitamin with high levels of B vitamins (or a strict B complex supplement), this will likely cause your urine to be bright yellow. )

In summary, just make sure you eat a variety of foods from each food group daily (fruits, vegetables, whole grains, healthy fats, and protein) and limit your intake of “junk foods” (desserts, chips, candy, soft drinks, etc.) as much as possible. 

Monday, February 9, 2009

The Austin Marathon, February 15, 2009

I'm sure many of you are getting ready for the Austin marathon on Feb. 15. I am too!

This week, be sure that you hydrate well every day. In the first few days of the week, make sure you have a balanced diet including at least 5-9 servings of fruits and vegetables , 6 ounces or more of lean protein, and 6 or more servings of starchy carbohydrates (at least 3 of which should be whole grains) daily. Don't forget to include a small amount of healthy fat as well, such as nuts, seeds, olives, avocado, etc.

Thursday, start increasing your portions of carbohydrates (as in, start carbo loading!). You don't necessarily need to increase your total calories, but decrease your portions of fats and low-carbohydrate/high fiber vegetables.

Friday, if at all possible get to the Expo and get all of your things packed for race day. I always try to have my race day clothes laid out w/the number pinned on ahead of time. I also like to have a comfy change of clothes and flip flops in my drop bag. In addition, I pack my race "snacks" in my race belt and shorts' pockets (sports beans, gold fish or pretzels, dried apricots, etc.). I also carry chap stick, tissues, band aids, tylenol, and a couple of individually packed sanitizing wipes. You may also want to have a garbage bag with neck and arm holes cut out ready to wear (makes a good wind breaker or rain coat, if the weather looks like it is going to be windy or rainy).

Saturday, keep it simple. Do not eat anything new! Eat foods you like and know you tolerate well. Make sure to drink something healthy at all your meals (not just water). If you normally have juice or sports drink, feel free to have some of that with your meals. Avoid gas-causing foods (such as beans, broccoli, cabbage, etc.) and very high fiber foods (such as bran cereals) if you have digestive problems. Also avoid sugar alcohols (such as sorbitol and mannitol (in gums, candies, etc.) as they may cause diarrhea. Also limit or avoid alcohol.

Race morning, try to eat something 1 to 3 hours before start time and aim for about 50 grams of carbohydrate for each hour before the start. If you do not tolerate solid foods well before races, liquid meals such as breakfast shakes, sports drinks, etc. are a good choice. Some athletes feel satisfied longer if their pre-race meal also contains some fat. I personally like to have a small bowl of cereal w/1% milk about 3 hours before the start, then a boiled egg or half a cliff bar about 90 minutes before the start, followed by a few sports beans or accelerade about 30 minutes before the start while I'm standing in the chute. I like to carry a small disposible water bottle that will have either plain water (if I plan to eat sports beans) or accelerade that I'll toss after the first couple of miles or so.

During the race, do not forget to use your supplements every 45 minutes to 1 hour (gels, gus, sports beans, etc.). You also need to drink 4 to 8 ounces of sports drink or water every 15 to 20 minutes.

Good luck, and see you at the finish line!