November 25, 2007
Filed under: Aerobic, Diet, Drugs, Muscle, Physical, Programs, Trainer — just4hours @ 4:13 am
1. Contraindications
There are some absolute contraindications, such as unstable angina, worsening heart failure, critical valve stenosis (mainly aortic), malignant arrhythmias, very recent infarction, and any acute intercurrent medical condition such as venous thrombosis or febrile illness: Relative contraindications include severe angina, severe heart failure and non-critical valve lesions, and potentially dangerous arrhythmias. All of the latter may be treated but need much closer supervision than patients with fewer complications: Risk stratification of patients at the onset of an exercise programme takes all these factors and more into account. (more…)
Filed under: Aerobic, Physical, Women — just4hours @ 4:11 am
Within the literature on psychophysiology an emerging research focus is on the notion of exercise addiction104,105 the contention being that the mood enhancing and analgesic properties associated with exercise are influenced by chemicals in the brain which are akin to opiates.’ Until recently, support for the existence of exercise addiction was meagre and often anecdotal.
More recent research has suggested strong links between exercise addiction and eating disorders. For example, Davis et al. found a significant relation between exercise dependence, weight preoccupation and obsessive-compulsive personality traits in women with eating disorders.”‘ Furthermore, the same study showed a significant relation between amount of physical activity and obsessive-compulsiveness in high-exercising women without eating disorders. (more…)
Filed under: Aerobic, Physical, Trainer — just4hours @ 4:09 am
To this point, we have not considered possible benefits of cardiac hypertrophy. It is well established that cardiac hypertrophy is associated with a large stroke volume and thus a large maximum cardiac output. Peak oxygen transport in turn is closely associated with peak cardiac output. Thus the person with a large heart is likely to have a large maximum oxygen intake. In consequence, they are able to undertake any given physical task at a correspondingly smaller fraction of their maximum oxygen intake. Many aspects of exercise related strain, from the increase of blood pressure to the sense of personal fatigue, are less for the person who has developed a large maximum oxygen intake. (more…)
November 24, 2007
Filed under: Man, Physical, Women — just4hours @ 2:24 am
Almost all previous investigations into rehydration after exercise, as with so much human physiology, have been concerned exclusively with men. This is in part a consequence of the possibility that the steroid hormones, which are subject to cyclical variation in women, may have an influence on fluid balance, and the wish to avoid this confounding factor.
Volume of drink consumed and net fluid balance 4 hours after rehydration. (more…)
Filed under: Diet, Drugs, Singles — just4hours @ 1:47 am
Several measures have been suggested to reduce the negative effects of circadian rhythm desynchronisation, although treatment of shift workers, competitive athletes, and simple international travellers is quite different. The measures include preadaptation, meal timing and composition, phototherapy, and chronobiotic drugs.
1. Preadaptation
Theoretically, the negative effects of jet lag can be reduced by changing bedtime for several days before a transcontinental journey, remembering that sleep changes should correspond to the direction of travel (eastward or westward). Adaptation should be disturbed by behaviour that anchors the circadian rhythms to the previous phase for example, taking prolonged naps at the new destination. To lock the circadian rhythms to home time, at least 4 hours sleep taken within the window of normal sleep in the home time zone are needed. However, in practice, preadaptation is superfluous when people are travelling west, arriving late, and only a few hours phase advance can be recommended before travelling east. Moreover, because of the difficulty of manipulating other synchronising factors (light, social constraints), preadjusting the sleep-wake cycles is largely ineffective. (more…)
Filed under: Diet, Man, Nutrition — just4hours @ 1:17 am
We have already demonstrated and discussed the need for drinking more than the sweat volume lost to have a chance of rehydrating effectively. However, in practice it is left to the discretion of an individual how much they consume and what they choose to drink.
In a study to examine the effect of palatability, together with the solute content of beverages, in promoting rehydration after sweat loss, eight men exercised in the heat to lose 2.l% of their mass.’ Over a 2 hour period after exercise, subjects were allowed to drink ad libitum; the drinks they received, each on a separate occasion, were a glucose-electrolyte beverage, aerated water, a commercial sports drink, and an orange juice/lemonade mixture. Subjects drank a greater volume of the sports drink and orange juice/lemonade mixture, the taste of which was perceived as being more pleasant. (more…)
Filed under: Man, Sex, Singles, Trainer, Women — just4hours @ 1:11 am
Long term suppression of serum testosterone associated with exercise may result from decreased production rates, decreased protein binding or increased clearance. Of theses, the most likely mechanism is decreased testosterone production arising from either intrinsic failure of the testis to maintain adequate steroid biosynthesis perhaps due to testicular microtrauma and temperature increase’ or from central dysfunction in the HPG axis. The latteris supported by reports of decreases in LH pulse amplitude” and frequency’ as well as changes in pituitary responses to hypothalamic stimulation by exogenous GnRH in male athletes. In addition, factors may interact with the HPG axis including dietary intake”‘” and raised concentrations of stress related hormones. (more…)
Filed under: Drugs, Physical, Trainer — just4hours @ 1:06 am
In the United Kingdom most cardiac rehabilitation programmes are run by nurses or physiotherapists with help from a multidisciplinary team, which in some cases includes sports scientists or other exercise specialists.’ The programme is divided into four phases.13 Phase 1 covers the time in hospital after acute myocardial infarction, and exercise is limited to gradual mobilisation including stair climbing to prepare the patient for discharge. Phase 2 includes the first few weeks at home when the main exercise, usually unsupervised, is a progressive walking programme. Ideally the patient is sent out with clear written guidance, and supplementary support can be given by telephone contact with a primary care team. Phase 3 is the supervised exercise programme which is the centrepiece of a package of care which includes education, dietary instruction, risk factor monitoring, stress management, and relaxation training. Phase 4 is the long term exercise to which it is hoped that most patients will adhere. In practice more than 50% will drop out of regular vigorous exercise once the supervised programme is over. A necessary prerequisite to phase 3 is the exercise test. (more…)
November 16, 2007
Filed under: Baby, Diet, Man, Mental, Muscle, Programs, Sex, Women — just4hours @ 1:39 am
1. Energy levels rise and you feel better
If people only realised it: their top excuse for not exercising is that they are too tired, but lack of exercise is the reason why they are tired in the first place! Exercise increases your energy levels. You may not feel like doing it, but once you have completed your workout for the day, oxygen levels are increased and the feel-good factor kicks in. Once you are in the habit, you will find you actually get a buzz out of exercising!
When the stress of life increases, your job gets on top of you or the kids become too much, then get out for some fresh air and get that body moving. Either join a club that has creche facilities or roster with your partner or friends to take turns. Maybe try going to the gym or for a walk in your lunch hour instead of sitting in the lunchroom. Even doing a lap around the outside of your house can do wonders for a stressed mind. (more…)
November 14, 2007
Filed under: Equipments, Man — just4hours @ 3:09 am
Swimming costumes have changed dramatically though the ages, so much so that if you wore today what people use to ware, we would be laughed at, and more than likely mocked, but with the variety of summing costumes we have today we don’t have to dwell in the past.
You get a two-piece swimming costumes witch is called a bikini and consists of a top and a bottom. There are many different kinds of bikinis some with under wire in the bikini top for support and those without. For those who are a bit more conservative you might like tanginess that is also a two piece but cover a lot more than a bikini, there are many different kinds of bikini bottoms you get the general kind, hot pants and the bikini that looks like a j-strings, the list goes on. (more…)
