MAF FITNESS NEWSLETTER

Vol. II, Issue 6, June 1995



T HIS month's issue of the "Newsletter" examines the world of exercises for the shoulders (deltoid and rotator cuff muscles) and arms (biceps only).

SHOULDERS

We will be dealing primarily with the deltoids: triangular muscles which cap the shoulders. They are commonly referred to as Anterior, Medial, and Posterior Deltoids, even though this is all one muscle. But we can more-or-less isolate muscle fibers in specific areas of the deltoids, hence the anterior, etc. designations. Some of the commonly prescribed shoulder exercises are:

SHOULDERS - ROTATOR CUFF

The rotator cuff is a group of four relatively small muscles (the Infraspinatus, Supraspinatus, Teres Minor, and Subscapularis) which lie deep beneath the Deltoids, and are part of the muscle/tendon structure that holds the shoulder joint together. Because of their strong involvement in rotational movements of the shoulder, these muscles are frequently injured, especially in sports like baseball. Remember that the design of the human shoulder is such that it is very mobile, but at the expense of structural integrity. Where the head of the arm bone (humerus) joins the shoulder is at a slight depression called the Glenoid Fossa. The humorus is "strapped" into the modest depression by a number of tendons, unlike the hip joint, where the head of the leg bone (femur) fits into a deep socket. [I think I described this already, in an earlier issue, but I don't remember where, so here it is again.] Anyway, the point of the following exercises is to work on flexibility, and strength to a very small degree - use only very light weights, or none at all. I know of no names for these exercises, so we will just call them RC-1, RC-2, and RC-3.

Okay, now we will finish our rotator cuff "stuff" with the:

ARMS - BICEPS

This section deals with the biceps, which flexes the elbow; actually the biceps brachii, the brachialis (which lies beneath the biceps brachii, and is therefore invisible), and the brachioradialis, which is in the upper forearm. In addition, we will discuss exercises for the triceps brachii, which extends the elbow. Note that "brachium" indicates "arm," so if you see a muscle with "brachi"-anything, you will know it is in the arm. Pretty nifty, huh.


QUESTIONS AND ANSWERS

Q What's a ROM?
Y.M.K.F., Henderson, NEV

A It's an acronym for range-of-motion, which is the range through which an individual can move a specific joint. To maintain maximum flexibility (see Note 1), we should exercise through the maximum ROM that we can. Stretching, along with weight training, can help maintain or increase our normal ROM. Do not exceed your maximum ROM to the point of pain. Proper stretching (typically static, not ballistic), performed regularly, can provide a gradual increase in your normal ROM.

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Note 1 - It is important to develop and maintain flexibility, which is one of the four components of fitness; 1) muscular strength and endurance, 2) flexibility, 3)cardiovascular/cardiopulmonary endurance, and 4) body composition.
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Q Can you tell me something about the quality of Cheerios as a breakfast cereal?
H.M.F., Roseburg, OR

A Yes, it so happens that I just read some nutrition information on - you guessed it - breakfast cereals. The article says that the old, traditional Cheerios are a pretty good product mostly whole-grain oat flour sweetened with just one gram of sugar per serving; however, the new Multi-Grain Cheerios is loaded with sugar. In fact, it has more sugar than three of the five types of grain that it promotes on the label. Not a healthy product. All-in-all, I prefer Nabisco Shredded Wheat, although even they have recently come out with a sugar coated variety.

A POT BELLY
FROM RUNNING?

Q I just heard a TV doctor say that exercise may cause or increase a pot belly. Do you care to comment?
Big John, San Antonio, TX

A Sure. Last night (May 9, 1995) on the channel 7 news, Dr Dean reported on a study published, I think, in Lancet, which suggested that exercise, specifically running, may cause or contribute to pot bellies. My impression is that this was simply another piece of irresponsible reporting on exercise. I haven't read the article yet, but it reportedly stated that runners exercise with relaxed abdominal muscles, hence the possible distension of the abdominal wall, eventually leading to a famous "pot." On my run this morning I took inventory of the state of my abdominal muscles - they were not relaxed. They weren't as tight as they would be if I were posing for a muscle magazine, but they were definitely slightly flexed. The result of an erect posture, perhaps. In fact, I don't think one could run with relaxed abdominal muscles. The report in Lancet must have been a medical student's joke. I am a "chest breather" as opposed to a "belly breather." About 20 years ago I read in a runner's magazine about "belly breathing," which was supposed to help prevent "side aches." But I doubt whether even that technique would result in a pot belly. By the way, how many serious runners have you seen with pot bellies? Some people have said that doing abdominal exercises (situps, crunches) while pushing out against the inside of the anterior wall of the abdominal cavity will cause the muscles to grow outward; an impossibility according to at least one wellknown exercise physiologist (a Ph.D.). Don't worry about this silly report; but of course, resistance exercise (e.g., calisthenics, like abdominal crunches; or weight training, like arm curls) may offset this tendency. More significant, relative to a pot belly is the X-Factor. Genetically determined locations of organs may cause some degree of the pot belly syndrome (e.g., the location of a uterus may prevent a flat belly). Likewise, the location of fat deposits are at least partially genetically determined. For that reason, a person with relatively little body fat may find that it tends to accumulate in unwanted areas. However, if you didn't have a pot at age 25, but you do at 45, don't blame it on your jeans, er genes.

UPDATE - I just came across an article in the Tufts University Diet & Nutrition Letter, the April 1995 issue, which deals with this pot belly subject. Joggers/runners that already have a pot belly: take heed. All the bouncing caused by jogging can stretch the abdominal muscles, which can make the problem worse. It is advised that this group (actually, virtually anyone can benefit from this recommendation) add some exercises for the abdominals and the lower back. In addition, hamstring exercise and stretching are advised, because they "pull" all the way up the back, and can cause a protruding belly, as well as back problems. This is getting away from the original question, but maybe it's relative here anyway. Big meals, especially at night, contribute to the problem - probably more than running. Abdominal extension is a result, that's why eating right before sleep isn't good. Your muscles relax and your abdomen stretches like a rubber band and eventually doesn't stretch back. Anyway, that's enough about pot bellies - you probably have gotten the idea by now.


On the next page we are starting a new feature of the MAF FITNESS NEWSLETTER called LETTERS TO THE EDITOR. It's purpose is to provide a forum for readers to contribute relevant information that they may run across in their meanderings through life.


LETTERS TO THE EDITOR

I just read the April 1995 TUFTS UNIVERSITY DIET & NUTRITION LETTER and learned a couple of things that I'd like to pass on to your readers. First, an update on Taco Bell's new Border Lights offerings. Although only four items are commonly available, more are soon to be available. The Border Light (BL) Taco, Taco Supreme, Soft Taco, and Soft Taco Supreme are acceptable - commendable, as far as fast foods go. But, some of the others aren't so commendable: in the BL Bean Burrito the fat and salt content are rising. The same with the BL Burrito Supreme, especially its salt content of 1303 mg, which is over half a day's worth - 2400 mg per day. [Note that we need only about 200 mg, but 2400 mg are the acceptable maximum.] Next is the BL 7 Layer Burrito, which also has relatively high fat and salt content. And finally, the BL Taco Salad, which sounds benign, but contains 680 calories, 225 of which are from fat, to go along with a high salt content. The roughly 30% fat content is acceptable to some, but I think it's on the high side, especially for someone trying to lose weigh, or not gain anymore. Thee bottom line is that not all of this is perfect food, but it is better than the vast majority of other fast food available.

A second piece of info from the same source is that pre-packaged veggies retain up to half as much of their nutrients as the cut variety which is out on display. Left exposed to air, cut veggies lose significant amounts of nutrients, but that doesn't mean not to buy them, only that prepackaged ones lose less. All of this stuff loses some nutrients as soon as it is separated from the earth that it lives in.
A.C.C., Woodside, CA

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