Sports Fitness Training

The hypothalamus is the neural center for the regulation of food intake. One area of the hypothalamus consisting of the lateral nuclei, controls hunger, or the craving for food. Another area consisting of the ventromedial nuclei, controls satiety, or the feeling of fulfillment. Therefore, drugs or supplements that act on the hypothalamus can act as an anorectic (appetite reducing) agent. Prescription drugs like amphetamine and fenfluramine function by increasing the level of brain catecholamines and 5-hydroxytrypt­amine (serotonin), which causes a feeling of fullness and suppresses the appetite, respectively Some dietary supplements could alter the levels of neurotransmitters in the hypothalamic region and regulate food intake.

The body may also produce its own satiety chemical or hormone that suppresses the appetite. The Set-Point Theory suggests that fat cells prefer to maintain a certain size. When there is a reduction in the size of the adipocyte due to dieting, a signal is sent to the hypothalamus resulting in an increase in appetite. As the fat cell regains its size, another signal is sent to the hypothalamus, which instructs the hypothalamus to reduce or stop the desire to eat.

The maintenance of a perfect body weight is a survival mechanism for higher organisms including mammals. Furthermore, the maintenance of body weight requires both the maintenance of energy and nutrient balance. This means that the diet must contain both adequate amounts of calories, macronutrients (carbohydrate, protein, and fat), and micro nutrients (vitamins and minerals).

Research using rodents may have discovered the signal for the Set-Point Theory. The signal is called leptin, and it appears to have a dual role, it decreases food intake and increases energy expenditure resulting in an increase in fat oxidation. When rats are bred to be deficient in this hormone, it causes them to overeat and become obese. When this hormone is administered to rats, it causes them to stop eating and increases fat oxidation, resulting in fat loss but not a loss in lean tissue (i.e., muscle). However, human research indicates that the hormone is not the problem, but rather the transporter. Obese individuals appear to develop a resistance to leptin that is similar to insulin resistance. Therefore, it may be impractical to expect leptin administration to humans to be a viable means of controlling obesity. If the transporters are already saturated or downregulated from excessive endogenous leptin, it does not make sense to provide more. Therefore, research has begun to focus on the leptin transporter and binding site in hopes of discovering the post-binding signaling cascade and any potential defects in this system. Leptin research is interesting and may one day provide a drug to control obesity, but this probably won’t happen for many years. For more information on leptin, read the excellent reviews by Hwang et al. and by requier and Tappy. Although several mechanisms could be used as a target for fat loss, most of the dietary supplements targeted as a fat loss agent do not have scientific research to support their claims.

The number of walkers, joggers, bicyclists, step aerobics participants, and swimmers is tangible evidence of American’s increased awareness of the most important aspect of physical fitness: cardiorespiratory fitness, which refers to the ability of the circulatory and respiratory systems to supply oxygen during sustained physical activity.

The primary category of physical activity known to improve cardiorespiratory endurance is aerobic exercise. The term aerobic means “with oxygen” and describes any type of exercise, typically performed at moderate levels of intensity for extended periods of time, that increases your heart rate. Aerobic capacity(commonly written as VO₂ max) is defined as the maximum volume of oxygen consumed by the muscles during exercise.

To measure your maximal aerobic capacity, an exercise physiologist or physician will typically have you exercise on a treadmill. He or she will initially ask you to walk or run at an easy pace, and then, at set time intervals during this graded exercise test, will gradually increase the workload(i.e., a combination of running speed and the angle of incline of the treadmill) to the point of maximal exertion. Generally, the higher your cardiorespiratory endurance level, the more oxygen you can transport to exercising muscles and the longer you can maintain a high intensity of exercise prior to exhaustion.

According to the exercise testing guidelines of the American College of Sports Medicine, maximal aerobic capacity treadmill tests should not be conducted on men over 40 or women over 50 without a prior comprehensive physical examination and permission from their physicians.

Aerobic Fitness Programs

Researchers tell us that a physically active lifestyle is the key to improved cardiovascular health, but what level of activity is required to improve aerobic fitness? There are numerous variables in any particular aerobic activity, but for healthy young adults, aerobic activity that works your heart at a moderate intensity(approximately 70 percent of your maximum heart rate, or about 140 to 160 beats per minute) for prolonged periods of time(20 to 60 minutes of continuous activity) will improve your fitness level.

The most beneficial aerobic exercises are total body activities involving all the large muscle groups of your body, for example, swimming, cross-country skiing, or rowing. If you have been sedentary for quite a while, simply initiating a physical activity program may be the hardest task you’ll face. Don’t be put off by the next-day soreness you are likely to feel in your long-dormant muscles. The key is to begin your exercise program at a very low intensity, progress slowly … and stay with it. For example, if you choose an aerobic fitness program that involves jogging, you’ll need several weeks of workouts combining walking and jogging before you will reach a fitness level that enables you to jog continuously for 15 to 20 minutes.

You will need to adjust the frequency, intensity, and duration of your aerobic activity program to accommodate your initial level of cardiorespiratory fitness. As you progress, add to your exercise load by increasing exercise duration or intensity, but do not increase both at the same time.

• Determining Exercise Frequency If you are a newcomer to regular physical activity, the frequency of your aerobic exercise bouts should be at least three times per week. The surgeon general’s recommendation is for moderate amounts of daily physical activity. As your fitness level improves, your goal should be to exercise 20 to 30 minutes per day, five days a week.

• Determining Exercise Intensity Your aerobic exercise program should employ activities of moderate intensity that use large muscle groups and can be maintained for prolonged periods of time. The measure of such a workout is your target heart rate, which is a percentage of your maximum heart rate. To calculate target heart rate, subtract your age from 220 for females or from 226 for males. The result is your maximum heart rate. You determine your target heart rate by calculating a desired percentage of maximum heart rate, often 60 percent. If you are a 20-year-old woman, your maximum heart rate is 200(220 – 20). Your 60-percent target heart rate would be 120(200 x .60). People in poor physical condition should set a target heart rate between 40 and 50 percent of maximum. As your condition improves, you can gradually increase your target heart rate. Increases should be made in small increments: Increase from 40 to 45 percent; then from 45 to 50 percent. Because of the potential risks and adherence-to-exercise problems associated with high-intensity activity(> 80% of maximum heart rate), moderate-intensity activity of longer duration is suggested for adults who are not training for competitive athletics.

Once you know your target heart rate, you can determine how close you are to this value during your workout. You’ll need to stop exercising briefly in order to measure your heart rate. To take your pulse, lightly place your index and middle fingers(don’t use your thumb) over one of the carotid arteries in your neck (along either side of your Adam’s apple), or over one of the radial arteries (thumb side) of your wrist.

Be sure to start counting your pulse immediately after you stop exercising, as your heart rate will decrease quickly. Using a watch or clock, take your pulse for six seconds and multiply this number by 10(just add a zero to your count) to get the number of beats per minute(bpm). Your pulse should be within a range of about 5 bpm above or below your target heart rate. If necessary, increase or decrease the pace or intensity of your workout to achieve your target heart rate.

A target heart rate of 70 percent of maximum is sometimes called the “conversational level of exercise” because you are able to talk with a partner while exercising. If you are a novice and you are breathing so hard that talking is difficult. your intensity of exercise is too high. If you can sustain a conversational level of aerobic exercise for 20 to 30 minutes, you will improve your cardiorespiratory fitness.

The lower the intensity of the activity, the longer the duration you’ll need to get the same caloric expenditure. For example, a 180-pound man will expend 288 calories per hour of playing golf if he carries his clubs, but will burn 805 calories per hour if he is cross-country skiing. Your goal should be to expend 300 to 500 calories per exercise session, with an eventual weekly goal of 1,500 to 2,000 calories.

Since many of the health benefits associated with cardiorespiratory fitness activities take about one year of regular exercise to achieve, you shouldn’t expect an immediate reduction in your risk of cardiovascular disease when you start an exercise program. However, any low-to-moderate-intensity physical activity, even if it does not meet all the cardiorespiratory exercise.

Cardiorespiratory fitness The ability of the heart, lungs, and blood vessels to supply oxygen to skeletal muscles during sustained physical activity.

Aerobic exercise Any type of exercise, typically performed at moderate levels of intensity for extended periods of time (typically 20 to 30 minutes or longer), that increases heart rate.

Aerobic capacity The current functional status of a person’s cardiovascular system; measured as VO₂ max.

Graded exercise test A test of aerobic capacity administered by a physician, exercise physiologist, or other trained person; two common forms are the treadmill running test and the stationary bike test.

Several agents have been promoted to increase fat loss. However, as you have read, minimal scientific data are actually available to support many of these products. The products, which have been shown to be beneficial in aiding fat loss, from a scientific point of view, include caffeine with or without ephedrine. Although caffeine alone or in combination with ephedrine appears to be the most effective, there is some controversy surrounding the use of these ingredients. When abused, ephedrine has been associated with adverse reactions including death. The use of caffeine also produces some unwanted side effects. However, if a caffeine and/or ephedrine product is used according to the manufacturer’s recommendations and if used alone, it is unlikely that any life-threatening events would occur with the use of the product. Nevertheless, appropriate supervision by a physician is always recommended.

An exercise intervention program was used in conjunction with the dietary supplement. The supplement, in most cases, did not produce a great effect, if any. The key to fat loss is that caloric expenditure must be greater than caloric intake. If it is not, fat loss will not occur.

Although new fat reduction supplements will appear on the market, the main physiological mechanism of body weight regulation, energy balance, is reflected by energy intake and energy expenditure. Excess energy intake without a concomitant rise in energy expenditure will result mainly in the deposition of fat into adipocytes. This excess energy may be in the form of carbohydrates, fat, and protein. A balanced diet with energy expenditure exceeding energy intake is the best form of fat reduction-guaranteed.

Reducing Lipid Absorption

Dietary lipid (predominately fat) is digested by specific enzymes including lipases, phospholipids, and cholesterol esterase. Most of the lipid digestion occurs in the duodenum of the small intestine in which lipids are emulsified by the detergent action of bile salts. Lipids and bile salts spontaneously form micelles. The micelles contain fatty acids and cholesterol, and serve as transporters. Micelles migrate to the brush border where lipids diffuse out of the micelles into mucosal cells.

Agents that can prevent lipid digestion and/or absorption appear an attractive approach as a fat loss mechanism or, more importantly, reducing blood cholesterol levels. In fact, there are some prescriptions and fat substitutes that function to reduce fat absorption. However, a reduction in lipid absorption has potentially negative side effects, including gastrointestinal discomfort, diarrhea, and a reduction in the absorption of fat soluble vitamins.

Since the passing of Title IX in 1972, opportunities for female athletes have consistently grown. In the past decade, however, that growth has been nothing short of remarkable. Women’s college basketball now rivals its male counterpart in many parts of the country; professional women’s basketball leagues have been greeted with success; and who can ignore the fervor that was created by the U.S. Women’s Soccer Team in the summer of 1999 as they played before sellout crowds in some of the largest athletic venues in the United States, on their way to winning the Women’s World Cup Soccer title.

As women continue to raise the bar in the world of sports, we learn more and more about their potential. At the same time, however, we also learn more about their tendencies toward injury. As athletic achievement for women has grown, an unsettling injury pattern also has arisen. Although medical experts are unsure of the reasons, female athletes appear to be more susceptible to knee injuries, particularly injuries to their anterior cruciate ligaments(ACLs). Recent studies indicate that women are anywhere from five to eight times more likely than men to suffer painful, disabling ACL injuries at some point in their lives.

The ACL is a strand of soft tissue that, along with other ligaments, muscles, and tendons, helps stabilize the knee joint. It’s role in pivoting, jumping, and sudden changes of direction is critical. Once it is damaged, mobility is often reduced. This ligament is most severely compromised when women partake in contact sports, such as soccer, basketball, and volleyball, although injuries have occurred in noncontact activities as well.

Once injured, the ACL must be repaired surgically and requires months of painful rehabilitation for any chance of a return to normal athletic levels. Even with therapy, ACL injuries can predispose people to later bouts of immobility, injuries due to lingering instability, and various forms of arthritis.

Why are we seeing this trend? Does the explanation lie in the fact that female participation itself has increased, or are female athletes truly more susceptible to these injuries? A number of hypotheses, ranging from physiological and anatomical differences to hormonal variances, have been suggested and are being explored further.

Many researchers in sports medicine suspect that musculoskeletal differences serve as the basic reason for the greater risk of ACL injury. According to the American Academy of Orthopedic Surgeons, the answers lie in physiological differences between males and females. Female athletes are thought to be at a disadvantage because of an imbalance in strength between the hamstring muscles, behind the thigh, and the quadriceps muscles in front of the thigh. When these two muscle groups work together, they act antagonistically to protect each other and supporting ligature, including that around the knee, from damage. Some researchers suggest that women tend to have underdeveloped or weak hamstrings, which results in increased stress placed on the ACL, particularly during unusual movements. In addition, during actions such as jumping and landing, it is felt that women tend to land more straight-legged and more flat-footed, a tendency related to weaker thigh muscles. In contrast, men often have much stronger quadriceps and hamstrings and tend to bend the knees and cushion the shock when jumping, thereby causing less stress on supporting structures. Thus, in women who are underexercised or have a severe imbalance between their quadriceps and hamstrings, the risk of ACL injury increases. In addition to lower muscle strength, sports medicine officials speculate that structural characteristics, such as wider hips, put greater pressure on the inside of the knee and less on the leg muscle.

Another hypothesis is that women are more prone to ACL injuries during ovulation, when increased estrogen works to reduce the production of collagen, the body’s connective tissue. Orthopedic surgeon Dr. Edward M. Wojtys put this theory to the test by evaluating the injuries of 40 young women with acute ACL injuries. He discovered that a majority of these women did in fact sustain their injuries during ovulation, encouraging the need for further investigation.

So, what can women do to protect themselves from ACL injuries? At this point, Dr. Wojtys says that there is no evidence that hormone supplements will protect women against ACL injuries. For the time being, however, doctors advise women to get involved in sports at an early age and partake in weight training and other types of conditioning that will build the hamstring muscles. When knee injuries do occur, they must be taken seriously and treated with rest, ice, compression, and elevation (RICE). If pain doesn’t subside, a visit to an orthopedic surgeon may be necessary.

While osteoporosis is a threat to both men and women later in life, the threat is more imminent for women due to the loss of estrogen after menopause. This is why it is critical that women begin protecting themselves early by building strong bones and muscles. Some useful facts about osteoporosis that will help you gain perspective on how you can help yourself today are:

• 25 million Americans have osteoporosis.

• Half of the women ages 50 and up are expected to have a degree of osteoporosis.

• One-third of the men ages 75 and older are expected to have osteoporosis.

• Caucasians are at greatest risk of osteoporosis.

• Bone fractures can be early indicators of osteoporosis.

• Osteoporosis is responsible for stooped posture and loss of height.

• By advanced age, women lose between 35 percent and 50 percent of their bone mass, and men, 20 percent to 35 percent.

• Weight-bearing exercise can help slow bone loss.

• Walking, jogging, running, and stair climbing help build bone mass.

• Weight lifting(resistance training) is recommended for preventing bone loss.

• Activities that use arm strength, such as tennis and volleyball, help build bone mass.

• A combination of strength training and weight-bearing exercises is an ideal preventative measure against osteoporosis.

Although we have been exhorted to exercise for much of the twentieth century, researchers and scientists continue to examine the world of fitness and exercise to determine the true impact of too much exercise, too little exercise, and the wrong and right types of exercise. Two recent studies cast an interesting light on exercise benefits for individual health.

The first, a study of 2,428 adults over a six-year period, examined the risks that those of us who are out of shape face when we suddenly decide to don exercise clothes, lace up the shoes, and hit the exercise trail. The research team studied heart-rate changes in the first minute after exercise among patients who had previous symptoms of heart disease. They found that people whose hearts took longer to slow down, or recover, after exercise were nearly four times more likely to die during the six­year study period than were participants with normal recovery times. While just 26 percent of all people in the study had abnormal recovery times, these people constituted 56 percent of all deaths during the course of the study. In addition, the study indicated that people who demonstrated good heart­rate recovery are more likely to benefit from heart surgery and other corrective procedures in the event of cardiovascular problems.

Results of the study indicate that people who have high blood pressure, are obese, take heart medications, and are out of condition physically face significant risks of heart failure when they begin unsupervised, strenuous physical activity. For someone out of shape, getting back into shape should be viewed as a serious behavioral change. Efforts to lose weight, reduce blood pressure, and work up to high-energy expenditures should be done gradually and under a doctor’s supervision. Although this has long been the recommended plan of action, this study confirmed the importance of following that plan. Most important, however, the study helped identify heart-rate recovery as a significant indicator of benefits and risks.

The second of the landmark studies was an epidemiological study of the exercise behavior patterns of over 14,000 female participants in the Nurses’ Health Study Although physical activity has long been associated with the reduced risk of coronary heart disease, little has been known about the benefits of certain types of exercise, particularly for women. Walking, in particular, has long been believed to be highly beneficial and often has been recommended as part of a rehabilitation program for people recovering [rom heart problems and other serious illnesses, but questions still arose about its specific benefits. Until the Nurses’ Health Study, the role of walking in the battle against heart disease had not been carefully analyzed, despite being the most common form of exercise among women.

In the Nurses’ Health Study, women’s risk factors and exercise behaviors were assessed every two years for a period of 14 years. Results of the study provide compelling evidence of the benefits of walking. It indicated that brisk walking may, in fact, be just as beneficial for the reduction of cardiovascular disease as vigorous exercise. Results suggested that a regimen of brisk walking for a total of three or more hours per week(an average of 30 minutes per day) could reduce the risk of coronary events by 30 percent to 40 percent. Increasing this time provided even greater benefits. This is in line with the most recent recommendations from the Centers for Disease Control and Prevention, the American Col1ege of Sports Medicine, and the Surgeon General’s Report on Physical Activity and Health.

The implications are clear. What we have long suspected is true: Walking makes good sense! It is relatively available to everyone, requires no special equipment, can be done alone or in groups, and may be less damaging to joints over time than repetitive running or other strenuous activities. So put on those walking shoes, and let’s get going.

Effective weight loss is what most of the obese or slightly over weight people seek. There are various ways of controlling the unnecessary weight gain like working out, hitting the gym, brisk walking, regulated and planned diet charts and a lot more. These days, one of the most popular ways to reduce weight is through the weight loss pills. These are actually the diet pills which can be availed from the market as well as online very easily. These weight loss pills are considered to be very beneficial in preventing weight gain and in losing the extra flab.

You can easily avail the diet pills from a good online service provider but it needs to be well ensured that it is a licensed one. You may choose a diet pill according to your individual needs and requirements so that its effect can be most suitable to you. Although you will be able to locate many diet pills online, but the problem arises when you have to decide which one is the best.

To combat this problem, it is always helpful that you read the weight loss pills reviews provided by all good and reputable websites. Reading of the weight loss pills reviews of various brands of diet pills will give you an insight regarding which pill will work the best for you. These reviews are put up on the sites after much investigation and analysis so that they can render you the best of the products.

You can also find the weight loss pills review of Pure Acai, a popular diet pill on most of the websites. It is rated among the top five acai berry products and has rich acai berry extracts. It is absolutely natural and thus safe for consumption as it produces no side effects at all. As per various clinical studies, Pure Acai aids in losing about 8-25 lbs/ month and does not cause any negative symptoms as well.

When we all talk about beauty and great skin, then beyond doubt, Aloe Vera deserves a special mention. There is not a single person that might be unaware what a great contribution this herb can be for acquiring great glowing skin, treating acne and to have better digestion. It is in fact useful in reducing the level of blood sugars in body as well.

Aloe Vera is widely used across the globe as an active ingredient of various health and cosmetic industries. More so, as it has been approved by the FDA as a safe ingredient for the skin and beauty products, people are happily availing it and enjoying its cosmetic benefits. Many people grow this herb in their houses and use it for treating the troublesome acne and for hydrating their skins. These days, the doctors are also recommending Aloe Vera to their patients suffering from the IBS or the Irritable Bowel Syndrome, gastric problems, diabetes, epilepsy and asthma as the consumption of the herb is regarded as very helpful in combating these ailments. Aloe Vera is known to be rich in vitamins, calcium, sodium, amino acids, nitrogen and enzymes.

Aloe Vera can be availed very easily in various forms like Aloe Vera juice, pills, tablets and gel. It is necessary that all these products are availed from licensed shops or web sites so that they are guaranteed and safe to use. There are reputed online service providers of Aloe Vera products online that can be logged in to avail these amazing products.

These days mens health is not merely restricted to great libidos, potency, muscles and dietary recommendations. The expanse of their health concerns have raised wide and every little aspects of their health are given importance these days. Men are becoming more aware regarding what they need to do and consume in order to keep in shape, maintain their vigor and to look attractive.

One of the major concerns of men these days pertains to teeth whitening . All men want to have sparkling white teeth so that they can smile and laugh confidently in public. Earlier, it was quite troublesome to make trips to the dentist in order to get the procedure done, but now men can be absolutely carefree regarding the teeth whitening process. This is so because men can now avail the great teeth whitening kits that are available online. These kits are beneficial as they have Carbamide Peroxide as their major constituent which helps in making teeth whiter in no time. More so, these kits can be easily used my men at home themselves without availing any help from the dentist. These kits have been developed after much careful research by the professionals and make teeth naturally white keeping them sparkling for the entire lifetime. Not only are these kits safe to use, but very effective too.

For personal fitness activities, the function of your exercise clothing is far more important than the fashion statement it makes. For some types of physical activity, you will need clothing that allows maximal body heat dissipation-for example, light-colored nylon shorts and mesh tank top while running in hot weather. For other types, you will need clothing that permits significant heat retention without getting you sweat-soaked-for example, layers of polypropylene and/or wool clothing while cross-country skiing.

The midsole of a running shoe must absorb impact forces, but must also be flexible. One method used to evaluate the flexibility of the midsole is to hold the shoe between the index fingers of your right and left hand. When you push on both ends of the shoe with your fingers, the shoe should be easily at the midsole. If the force exerted by your index fingers cannot bend the shoe, its midsole is probably too rigid and may cause irritation of your Achilles tendon, among other problems. Other basic characteristics of running shoes include: a rigid plastic insert within the heel of the shoe(known as a heel counter) to control the movement of your heel; a cushioned foam pad surrounding the heel of the shoe to prevent Achilles tendon irritation; and a removable thermoplastic innersole that customizes the fit of the shoe by using your body heat to mold it to the shape of your foot. Shoes are the runner’s most essential piece of equipment, so carefully select appropriate footwear before you start a running program.

Shoe companies also sell cross-training shoes to help combat the high cost of having to buy separate pairs of running shoes, tennis shoes, weight-training shoes, and so on. Although the cross-training shoe can be used for participation in several different fitness activities by the novice or recreational athlete, a distance runner who runs 25 or more miles per week needs a pair of specialty running shoes in order to prevent injury

Eye injuries can occur in virtually all fitness-related activities, though the risk of injury is much greater in some activities than in others. As many as 90 percent of the eye injuries resulting from racquetball and squash are preventable with the use of appropriate eye protection-for example, goggles with polycarbonate lenses. One-eyed participants should wear polycarbonate prescription or nonprescription eyeglasses for all recreational activities.