On the issue of sudden death while swimming

1935 ◽  
Vol 31 (3-4) ◽  
pp. 538-538
Author(s):  
E. Strauge

Based on the experience gained with a single clinical observation, the author concludes that the sudden death of healthy young people during swimming is in some cases due to shock caused by the absorption of toxic amounts of H-substants (histamine), which are released in the overly sensitive skin due to cooling.

Author(s):  
José Manuel Rodríguez-Ferrer

We have studied the effects of normal aging on visual attention. Have participated a group of 38 healthy elderly people with an average age of 67.8 years and a group of 39 healthy young people with average age of 19.2 years. In a first experiment of visual detection, response times were recorded, with and without covert attention, to the presentation of stimuli (0.5º in diameter grey circles) appearing in three eccentricities (2.15, 3.83 and 5.53° of visual field) and with three levels of contrast (6, 16 and 78%). In a second experiment of visual form discrimination circles and squares with the same features as in the previous experiment were presented, but in this case subjects only should respond to the emergence of the circles. In both age groups, the covert attention reduced response times. Compared to young people, the older group achieved better results in some aspects of attention tests and response times were reduced more in the stimuli of greater eccentricity. The data suggest that there is a mechanism of adaptation in aging, in which visual attention especially favors the perception of those stimuli more difficult to detec


Circulation ◽  
2001 ◽  
Vol 103 (5) ◽  
pp. 710-717 ◽  
Author(s):  
Domenico Corrado ◽  
Cristina Basso ◽  
Gianfranco Buja ◽  
Andrea Nava ◽  
Lino Rossi ◽  
...  

Folia Medica ◽  
2021 ◽  
Vol 63 (4) ◽  
pp. 502-510
Author(s):  
Oyéné Kossi ◽  
Justine Lacroix ◽  
Maxence Compagnat ◽  
Jean Christophe Daviet ◽  
Stéphane Mandigout

Aim: To test the validity of Borg’s 6–20 rating of perceived exertion scale in assessing the exertion intensity over a multi-activity session in young and older adults.Materials and methods: This cross-sectional study included 56 healthy participants. All participants underwent a single session of activities including working on a computer, treadmill walking, biking, and treadmill running. Results: Results showed a non-significant correlation between the overall perceived exertion and energy expenditure in young people (Rho=−0.05, p=0.75) and in older adults (Rho=−0.05, p=0.78) for the whole session. However, results showed that older adults perceived significantly higher exertion compared to young people while working on a computer, walking and running, whereas they presented lower energy expenditure while resting and working on a computer. Conclusions: Combining the perceived exertion method with other commonly used methods to estimate exercise intensity would be recommended for older adults.


Author(s):  
Nathana Alves de França ◽  
Lucca Zambuzzi Nardin do Nascimento ◽  
Caluê Papcke ◽  
Eduardo Mendonça Scheeren

2010 ◽  
Vol 177 (3) ◽  
pp. 305-308 ◽  
Author(s):  
Jo Robinson ◽  
Meredith Harris ◽  
Sue Cotton ◽  
Ally Hughes ◽  
Philippe Conus ◽  
...  

Author(s):  
Theodoros Kelesidis ◽  
Elizabeth Tran ◽  
Sara Arastoo ◽  
Karishma Lakhani ◽  
Rachel Heymans ◽  
...  

Background Tobacco cigarettes (TCs) increase oxidative stress and inflammation, both instigators of atherosclerotic cardiac disease. It is unknown if electronic cigarettes (ECs) also increase immune cell oxidative stress. We hypothesized an ordered, “dose‐response” relationship, with tobacco‐product type as “dose” (lowest in nonsmokers, intermediate in EC vapers, and highest in TC smokers), and the “response” being cellular oxidative stress (COS) in immune cell subtypes, in otherwise, healthy young people. Methods and Results Using flow cytometry and fluorescent probes, COS was determined in immune cell subtypes in 33 otherwise healthy young people: nonsmokers (n=12), EC vapers (n=12), and TC smokers (n=9). Study groups had similar baseline characteristics, including age, sex, race, and education level. A dose‐response increase in proinflammatory monocytes and lymphocytes, and their COS content among the 3 study groups was found: lowest in nonsmokers, intermediate in EC vapers, and highest in TC smokers. These findings were most striking in CD14 dim CD16 + and CD14 ++ CD16 + proinflammatory monocytes and were reproduced with 2 independent fluorescent probes of COS. Conclusions These findings portend the development of premature cardiovascular disease in otherwise healthy young people who chronically vape ECs. On the other hand, that the COS is lower in EC vapers compared with TC smokers warrants additional investigation to determine if switching to ECs may form part of a harm‐reduction strategy. Registration URL: https://www.clinicaltrials.gov ; Unique identifier: NCT03823885.


Sign in / Sign up

Export Citation Format

Share Document