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PubMed2006

The effect of long-term swimming program on glycemia control in 14-19-year aged healthy girls and girls with type 1 diabetes mellitus.

UNLABELLED: The aim of this study was to evaluate the effect of long-term physical activity in the water on glucose control. MATERIAL AND METHODS: Altogether, 19 girls with duration of diabetes of 8.1 +/- 0.9 years and 28 healthy girls aged 14-19 years participated in the study. The participants with type 1 diabetes mellitus were questioned; glycosylated hemoglobin was measured before and after long-term swimming program for the participants with type 1 diabetes mellitus. Glycemia control was assessed by blood glucose monitoring before and after every physical sessions. Training sessions (each lasted for 45 min) were held twice per week for 14 weeks. A total of 28 trainings were performed in the swimming pool. Workload intensity was corrected by pulse measurement before and after every session in the water. RESULTS: After a 14-week long-term physical program glycosylated hemoglobin level has decreased (p < 0.01) in diabetic subjects (8.5 +/- 0.4 vs 7.8 +/- 0.3%). Hyperglycemia significantly decreased for all subjects, but its response to the physical exercises in the water was the highest in diabetics (p < 0.001). CONCLUSION: Long-term physical activity program in the water improved glycemia control for all participants.

Adolescent↗
PubMed2001

A statewide outbreak of cryptosporidiosis in New South Wales associated with swimming at public pools.

From December 1997 to April 1998, 1060 laboratory-confirmed cryptosporidiosis cases were reported in New South Wales, Australia. In a case-control study, compared with 200 controls, the 100 cases were younger (mean age 42 versus 71 years; P < 0.0001), more likely to report swimming at a public pool (59% versus 38%; adjusted OR and 95% CI = 27; 1.4-5.1) and swimming in a dam, river or lake (OR = 48; 1.1-20.3) but less likely to report drinking bottled water (OR = 0.4; 0.2-0.9). In subgroup analyses, in rural areas illness was associated mainly with contact with another person with diarrhoea, and in urban areas illness was associated with swimming in a public pool. Cryptosporidium oocysts were more commonly detected in pools to which at least two notified cases had swum (P = 004). Outbreaks of cryptosporidiosis can be prolonged, involve multiple pools and be difficult to control.

Adolescent↗
PubMed1982

Endocrine response patterns and psychological correlates.

A group of young men volunteering for military service in the United States Navy were studied during an acute stress situation. The subjects (S's)(N = 62) were non-swimmers, and they all had to jump from a 5-foot platform into the deep end of a swimming pool. Before and after the exposure, blood and urine samples were taken for endocrine analysis. The Defense Mechanism Test (DMT), the Coping Operations Preference Enquiry (COPE), Joffe and Nanitch Scales for Defenses (J&N), and a Mood Questionnaire (MQ) were administered. For the endocrine reactions, postsamples, 3 factors emerged: a Cortisol factor, a Testosterone factor, and a Catecholamine factor. There was a significant correlation between the Cortisol factor and defense mechanisms, evaluated both by the DMT and the paper-and-pencil tests. Furthermore, there was a significant relationship between high anxiety, and defense mechanisms on the one hand, and physiological responses on the other.

Adaptation, Psychological↗
PubMed1999

Short-bowel syndrome associated with subtotal necrosis of small intestine after rectal trauma.

We report on a 4-year-old girl who experienced rectal trauma during swimming, sitting on an uncovered draining valve in the swimming pool. This resulted in a powerful suction effect on her rectum, followed by rupture of the sigmoid colon and evisceration of the small intestine. Laparotomy showed a near complete necrosis of the small bowel because of thrombotic lesions and wall lacerations of the superior mesenteric artery (SMA). A subtotal bowel removal associated with a jejuno-ileostoma was carried out, a total length of about 35 cm of the small intestine could be left in situ. Parenteral nutrition was stopped after eight months. At the moment defecation takes place 2-3 times a day, growth and weight gain are quite normal.

Accidents↗
PubMed1991

Death during immersion in water in childhood.

Drowning is a relatively common cause of accidental death in children. Autopsy records at the Adelaide Children's Hospital over a 27-year period from 1964 to 1990 were examined, and 58 cases were found where the cause of death was listed as drowning. In six cases, however, careful examination of the history and postmortem findings provided important additional information that suggested a more complex antemortem sequence of events. Specifically, four patients aged between 6 years, 10 months and 11 years were known to have had epilepsy. A further patient, an 8-year-old boy, died from a subarachnoid hemorrhage due to a bleeding cerebral arteriovenous malformation while swimming. The final patient, an 11-year-old boy who collapsed in a public swimming pool, was found at autopsy to have marked hypoplasia of the right coronary artery. In this series, six of 58 (10.3%) of the pediatric cases had additional underlying medical problems that could either have initiated the drowning episode or caused death due to alternate mechanisms. We present the clinicopathological findings in detail to demonstrate that a high index of suspicion must be maintained in all cases of pediatric drowning, not only for unnatural causes of death but also for additional natural disease processes that may have contributed significantly to the fatal episode. These findings may have particular relevance in jurisdictions where full postmortem examination is not always required by law.

Accidents↗
PubMed1979

Body contact swimming rescues--what are the risks?

A survey of 482 lifeguards and Water Safety Instructors revealed that at least one-half had performed body contact swimming rescues (BCRs). Over two-thirds of these BCRs occurred when the lifesaver was relatively inexperienced in actual water rescues of any kind although virtually all rescuers had received formal lifesaving training. The victim tried to grasp the rescuer in 26 per cent of the BCRs which took place in swimming pools and 39 per cent of those occurring in lakes. Most of these attempts were made during the approach and were predominantly from the front, around the rescuer's head and neck or wrists and arms. Since the majority of victims were younger and smaller than their rescuers and got into difficulty less than 3 m from safety, only a small proportion of the grasps were perceived as endangering the lifesaver. Consequently, the victim was often permitted to retain the hold while being rescued. Grasps which were reported to be threatening tended to be applied by individuals of equal or larger physical size than the rescuer and usually occurred at distances exceeding 3 m from safety.

Adolescent↗
PubMed1999

Drowning and near-drowning--some lessons learnt.

Over a period of sixteen months, 17 cases of submersion injury (encompassing victims of drowning and near-drowning) were attended to at our Accident and Emergency Department at Changi General Hospital. Most of the victims were inexperienced recreational swimmers, and in 6 of them, early bystander cardiopulmonary resuscitation enabled them to recover without severe morbidity. Non-cardiogenic pulmonary oedema with resulting chest infection was the commonest complication in survivors. Most of the episodes occurred in an urban setting in swimming pools without supervision by lifeguards. About two-thirds of the cases were adults over the age of fifteen years. In addition, there were patients in whom submersion injury was associated with more sinister conditions (fits, traumatic cervical spine injury, dysbarism, intoxication from alcohol or drugs), some of which were unsuspected by the doctors initially. Apart from the immediate threats of hypoxia and pulmonary injury, active search for any possible precipitating causes and associated occult injury should be made. In this study, the determinants of survival from near-drowning were early institution of cardiopulmonary resuscitation, presence of pupil reactivity, and presence of a palpable pulse and cardiac sinus rhythm.

Accidents↗
PubMed1999

Onychomycosis in Icelandic swimmers.

We investigated visitors to a swimming pool in Reykjavik to determine whether onychomycosis of the toenails is more prevalent in swimmers than in the general population, where the prevalence is believed to be between 3 and 8%. A total of 266 swimmers over the age of 17 years were interviewed and examined. When an onychomycosis was suspected a nail specimen was taken for mycological examination. Onychomycosis was clinically suspected in 105 cases (40%). In 60 cases (23%) a dermatophyte infection was confirmed by culture and 14 cases (5%) were microscopy-positive only. The prevalence of culture-positive onychomycosis was 15% in women and 26% in men. Our results suggest that onychomycosis of the toenails is at least 3 times more prevalent in swimmers than in the rest of the population.

Adolescent↗
PubMed2002

Place and matching-to-place spatial learning affected by rat inbreeding (Dark-Agouti, Fischer 344) and albinism (Wistar, Sprague-Dawley) but not domestication (wild rat vs. Long-Evans, Fischer-Norway).

Domestication has been shown to produce a shift in both morphological and behavioral characteristics of animals. While changes in body weight, brain size, reproductive rates, and temperament are well documented, the effects of domestication on learning and memory are not as clearly understood. This issue is of particular importance to the use of rodent models in learning and memory where the domestication of Rattus norvegicus for research has resulted in the availability of numerous strains. To investigate cognitive effects resulting frm domestication, we examined the spatial performance of a number of rat strains: wild, Long-Evans, Fischer-Norway, Dark-Agouti, Wistar, Fischer 344, Sprague-Dawley. The wild rats served as a baseline for comparing inbred and outbred domestic strains and pigmented and albino domestic strains. Place (a measure of nonspatial and procedural learning), matching-to-place (spatial working memory), and probe (retention) performance were measured in the Morris swimming pool task. The task is an ideal means for comparing different rat strains because place learning has not been selected for in the domestication of Rattus norvegicus and because the task is ethologically relevant. The results indicated that wild rats and Long-Evans rats did not differ on any measure, with Fischer-Norway rats being only slightly inferior. Larger impairments were found in Wistar > Fischer 344 > Dark-Agouti > Sprague-Dawley strains. Impairments were more obvious on place acquisition but also occurred in matching-to-place performance. Platform crosses, but not quadrant preference was found to be correlated with place learning. In general, although nonspatial and spatial deficits were associated with both inbreeding and albinism, impaired spatial performance is not a necessary result of domestication.

Animals↗
PubMed1993

The effect of prone immersion on bronchial responsiveness in children with asthma.

We studied the effects of prone immersion on pulmonary function in children with asthma. Twelve children with asthma were subjected to prone immersion (WET) and standing upright on land (DRY) under controlled conditions regarding temperature and relative humidity of the inhaled air, minute ventilation, respiratory frequency, tidal volume, and the concentration of carbon dioxide in the exhaled air. Eight minutes of isocapnic hyperpnea was performed in random order either in the swimming pool (prone) or on land (upright), with the temperature and relative humidity of the inhaled air kept at 20 +/- 2 degrees C and 10 +/- 2%, respectively. The average accumulated ventilation for the 8 min of hyperpnea was 3151 for the WET treatment and 3101 for the DRY (P > 0.1). Average heart rates were 101 +/- 11 and 115 +/- 17 beats.min-1 for the WET and DRY treatments, respectively (P < 0.05). The decrease in FEV1 (delta FEV1) was 26.3 +/- 16.7% after the WET treatment (compared with pretreatment FEV1), and 26.4 +/- 11.3% after the DRY treatment (P > 0.1 between WET and DRY delta FEV1), with similar trend (insignificant differences between treatments), for delta FVC, delta PEF 50%, and delta PEF 25-75%. It is concluded that airway hyperactivity is not alleviated by whole body prone immersion.

Adolescent↗
PubMed1985

Formation of a place learning-set by the rat: a new paradigm for neurobehavioral studies.

The Morris water swimming task provides an ideal way of studying spatial navigational abilities in rats. It requires that rats swim to find a platform located just below the surface of the water in a swimming pool, and rats will learn and perform the task readily without being subject to nutrient deprivation. A novel adaption of the task, in which rats are shown to form a place learning-set, is described in the present paper. The learning-set paradigm can be used for the repeated evaluation of spatial navigation abilities in the same animals over a long period of time. The procedure is based on the finding that once trained, rats can acquire a new place response each day. Each new response can be learned within one or two trials, given within the time period of a few seconds, and once acquired, the response can be retained for a number of days, or until the problem is changed. The procedure can be usefully applied to the study of recovery of function following brain damage, the study of memory processes following brain damage, the changes in memory processes accompanying aging, or it can be used for the screening of pharmacological compounds, etc. The technique may be especially useful for the study of the performance of individual rats.

Animals↗
PubMed1997

Sports supplement drinks and dental health in competitive swimmers and cyclists.

AIM: To assess dental status and sports supplement uptake in swimmers and cyclists. To determine chemico-physical properties of the most popular sports drinks. DESIGN: Descriptive, prevalence study of tooth wear and caries experience. Questionnaire analysis of sports drinks usage. SETTING: Two public swimming pools in Liverpool and three cycle clubs in North West England. SUBJECTS AND METHOD: A convenience sample of swimmers and cyclists was examined for caries and tooth wear. A questionnaire ascertained which sports drinks were consumed and their pattern of consumption. pH and titratable acidity, concentrations of calcium, phosphate and fluoride, and viscosity were analysed. Salivary flow rate in response to these drinks and water was also determined. RESULTS: 25 swimmers and 20 cyclists participated. Caries experience and tooth wear into dentine (excluding incisally exposed dentine) was significantly more frequent among cyclists (P < 0.05). Cyclists had significantly more upper palatal wear (P < 0.001). Pattern of sport drink consumption between the two groups was significantly different (P < 0.001). pH range of the most popular sport drinks was 2.4-4.5. Salivary flow rate after a 1-minute rinse was significantly lower (P < 0.05) with one drink (0.47 ml/min) and water (0.41 ml/min) compared with the other drinks. CONCLUSIONS: An association between caries or erosive tooth wear and sport drink consumption was not found. However, the erosive potential of sport drinks is real and must be borne in mind as an aetiological factor for erosion in young people.

Adolescent↗
PubMed2004

Comparison of water turnover rates in young swimmers in training and age-matched non-training individuals.

Total body water (TBW) and water turnover rates (WTR) of 8 competitive swimmers (SW) and 6 age-matched non-training individuals (CON) were determined using deuterium oxide dilution and elimination. During the 7-day study, individuals in the SW group trained 9 times, swimming on average 42.4 km, while the CON group did no regular exercise. Water temperature in the swimming pool was between 26 and 29 degrees C during training sessions. Body mass at the beginning and end of the study period remained essentially the same in the SW (67.8+/- 6.3 kg) and CON (61.1 +/- 8.5 kg) groups. Mean +/- SD TBW of the SW (38.7+/- 5.6 L) was similar to that of the CON (37.5 +/- 8.0 L). Mean WTR was faster in the SW (54 +/- 18 ml x kg x day(- 1) than the CON (28+/- 21 ml x kg x day(-1)). Mean daily urine output was similar in the SW (14 +/- 5 ml x kg x day(-1)) and CON (14+/- 3 ml x kg x day(-1)). Calculated non-renal daily water loss was faster in the SW (41 +/- 21 ml x kg x day(-1)) than the CON (13 +/- 20 ml x kg x day(-1)). This study demonstrates that WTR are faster in young swimmers who exercise strenuously in cool water than in non-training individuals and that the difference was due to the approximately 3-times greater non-renal water losses that the exercising group incurred. This suggests that exercise-induced increases in sweat rates are a major factor in water loss in swimmers training in cool water.

Adolescent↗
PubMed1985

Pseudomonas aeruginosa O-11 folliculitis. Development into ecthyma gangrenosum in immunosuppressed patients.

Six immunocompromised patients were shown to exhibit Pseudomonas aeruginosa folliculitis in apocrine regions similar to "swimming pool" folliculitis. The lesions evolved within 24 hours as severe ecthyma gangrenosum. The source of the P aeruginosa, serotype O-11, was found in the water system of the hospital. Clinical identification of the lesions and early treatment is important to prevent severe manifestations.

Adult↗
PubMed1985

Corneal endothelium following immersion of eyes in water.

Eye banks are occasionally asked to retrieve corneal tissue from drowning victims. The ambient water surrounding the eyes before recovery of the victim has chemical, pH, and osmotic characteristics different from those of aqueous humor, thereby possibly making corneas recovered from these eyes unsuitable for transplantation. Corneal endothelial cell function and ultrastructure were maintained following soaking of rabbit eyes for three hours in either seawater, fresh lake water, or chlorinated swimming-pool water at 25 degrees C. The data suggest that physiological and ultrastructural integrity of the corneal endothelium is maintained under these conditions, and that if other, generally accepted criteria of donor suitability are met, such corneas are probably suitable for transplantation.

Animals↗
PubMed1996

Injury prevention training in pediatric residency programs.

OBJECTIVES: To quantify the content and setting of injury prevention training provided to pediatric residents and to identify aspects of residency programs associated with this training. DESIGN: Mail survey. SETTING: US pediatric residency programs. PARTICIPANTS: Residency program directors. MAIN OUTCOME MEASURES: Number of programs stating that they train residents in various injury prevention topics, and the setting of this training. RESULTS: More than 80% of programs addressed 92% of topics surveyed dealing with disease prevention, but only 59% of topics dealing with injury prevention. Injury prevention topics covered less frequently included smoke detector use and swimming pool, sports, and firearm safety. Programs used continuity clinics most often to teach injury prevention. No specific program characteristic was associated with the content or setting of injury prevention training. Residency programs located in states in which house fires, drowning, or firearm injuries are the leading causes of death were not more likely to offer prevention training on these topics. CONCLUSIONS: Injury prevention is less frequently taught than disease prevention in pediatric residency training. Injury prevention is most often taught in continuity clinics, the setting most consistent with ongoing primary patient care. A gap exists between the leading causes of injury death and injury prevention topics taught to pediatric residents. Residency programs must better recognize and adapt to the epidemiology of trauma in their communities, better enabling new pediatricians to meet their patient's needs.

Education↗
PubMed1996

Paradoxical sleep deprivation and sleep recording following training in a brightness discrimination avoidance task in Sprague-Dawley rats: paradoxical effects.

Previously, we reported that posttraining paradoxical sleep deprivation (PSD) resulted in an enhancement of the subsequent avoidance performance for rats trained for 15 trials in a Y-maze brightness avoidance discrimination task. A series of experiments were conducted to try to further understand the reasons for results which were contrary to those of the bulk of the sleep-learning literature. Experiment 1 investigated the effectiveness of the PSD technique. Rats (N = 4) were sleep recorded while residing on a "swimming pool" apparatus for 24 h. Compared to their baseline values, all animals showed a very large reduction in paradoxical sleep and spent significantly more time awake. Slow-wave sleep was unchanged. In Experiment 2, proactive motor effects were tested. Rats were deprived of PS for 24 h and then tested in a hole board motor activity task. There was a slight effect of PS deprivation on the day following the PSD and no effect when the rats were retested 1 week later. Experiment 3 investigated possible proactive effects of PSD on avoidance performance. Rats exposed to PSD in the 24 h before training in the Y-maze task did not demonstrate any facilitative effect on the subsequent avoidance performance. Experiment 4 investigated the possibility that the PSD facilitative effect could be due to partial training. Rats were given 75 acquisition trials in the brightness discrimination Y-maze avoidance before being subjected to 24 h of PSD. PS-deprived animals showed superior avoidance scores compared to non-PSD controls when retested 24 h later. In Experiment 5, the same strain of rats (N = 11) were sleep recorded after exposure to a partial acquisition in a Y-maze brightness avoidance discrimination task. They were then continuously monitored for 4 consecutive days. The percent PS for the Trained rats was significantly lower than that for the Control animals. This drop in percent PS was not confined to any particular time period in the 24-h day. None of the other sleep parameters reached significance. Analyses of the present results suggest that PSD exerts its facilitative effects on posttraining consolidation processes. We present arguments suggesting that PSD can have effects opposite to those generally reported, in animals demonstrating poor avoidance abilities, in an avoidance task.

Animals↗
PubMed1996

Chlorophenols in the terrestrial environment.

Chlorophenols are presently widespread in the environment. Even in the most remote natural environments, the presence of chlorophenols in both aquatic and terrestrial food chains has been recorded. These pervasive compounds have been used for a wide range of domestic, agricultural, and industrial purposes for more than 50 years. In addition to industrial production and usage, chlorophenols are produced from naturally occurring phenols as a result of chlorine bleaching of wood pulp in the paper industry and through the chlorination of domestic water supplies and swimming pools. It must be emphasized that chlorophenols, although a local problem in some areas, generally cannot be considered a major environmental problem today because their use is prohibited or restricted in many countries. Future reduction in the use of the herbicidal phenoxy acids will further minimize their levels in the terrestrial environment. Because of the long persistence and high toxicity of pentachlorophenol in particular, however, it is important that the discharge of chlorophenols to the terrestrial environment by way of sewage sludge or pulp mill effluents be maintained at their current levels or even reduced to lower levels.

Animals↗