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Microscopy and Microanalysis : the... Jul 2023
PubMed: 37613380
DOI: 10.1093/micmic/ozad067.322 -
Sports Medicine International Open Mar 2021Workload-indexed blood pressure response (wiBPR) to exercise has been shown to be superior to peak systolic blood pressure (SBP) in predicting mortality in healthy men....
Workload-indexed blood pressure response (wiBPR) to exercise has been shown to be superior to peak systolic blood pressure (SBP) in predicting mortality in healthy men. Thus far, however, markers of wiBPR have not been evaluated for athletes and the association with vascular function is unclear. We examined 95 male professional athletes (26±5 y) and 30 male controls (26±4 y). We assessed vascular functional parameters at rest and wiBPR with a graded bicycle ergometer test and compared values for athletes with those of controls. Athletes had a lower pulse wave velocity (6.4±0.9 vs. 7.2±1.5 m/s, p=0.001) compared to controls. SBP/Watt slope (0.34±0.13 vs. 0.44±0.12 mmHg/W), SBP/MET slope (6.2±1.8 vs. 7.85±1.8 mmHg/MET) and peak SBP/Watt ratio (0.61±0.12 vs. 0.95±0.17 mmHg/W) were lower in athletes than in controls (p<0.001). The SBP/Watt and SBP/MET slope in athletes were comparable to the reference values, whereas the peak SBP/Watt-ratio was lower. All vascular functional parameters measured were not significantly correlated to the wiBPR in either athletes or controls. In conclusion, our findings indicate the potential use of the SBP/Watt and SBP/MET slope in pre-participation screening of athletes. Further, vascular functional parameters, measured at rest, were unrelated to the wiBPR in athletes and controls.
PubMed: 33889714
DOI: 10.1055/a-1400-1897 -
The Medical and Physical Journal Feb 1801
PubMed: 30489783
DOI: No ID Found -
The Canadian Veterinary Journal = La... Aug 2017
Topics: Curriculum; Emotions; Health Knowledge, Attitudes, Practice; Humans; Self Concept
PubMed: 28761197
DOI: No ID Found -
The British Journal of General Practice... Jun 2019
Topics: Famous Persons; History, 20th Century; Humans; Motion Pictures; Resilience, Psychological; Self Efficacy; Women's Rights
PubMed: 31147333
DOI: 10.3399/bjgp19X703973 -
CMAJ : Canadian Medical Association... Sep 2021
Topics: Alzheimer Disease; Antibodies, Monoclonal, Humanized; Canada; Dose-Response Relationship, Drug; Humans; Molecular Targeted Therapy; Primary Health Care
PubMed: 34518345
DOI: 10.1503/cmaj.211134 -
The Lancet. Rheumatology Jan 2020
PubMed: 38258278
DOI: 10.1016/S2665-9913(19)30133-X -
Metrologia 2016Using a watt balance and a frequency comb, a mass-energy equivalence is derived. The watt balance compares mechanical power measured in terms of the meter, the second,...
Using a watt balance and a frequency comb, a mass-energy equivalence is derived. The watt balance compares mechanical power measured in terms of the meter, the second, and the kilogram to electrical power measured in terms of the volt and the ohm. A direct link between mechanical action and the Planck constant is established by the practical realization of the electrical units derived from the Josephson and the quantum Hall effects. By using frequency combs to measure velocities and acceleration of gravity, the unit of mass can be realized from a set of three defining constants: the Planck constant , the speed of light , and the hyperfine splitting frequency of Cs.
PubMed: 32165768
DOI: 10.1088/0026-1394/53/5/a83 -
BMJ (Clinical Research Ed.) Oct 1994
Topics: Fossil Fuels; Health Status; Humans; Poverty; Public Policy; Taxes; United Kingdom
PubMed: 7950727
DOI: 10.1136/bmj.309.6961.1030 -
Clinical Research in Cardiology :... Mar 2022During the COVID-19 pandemic, compulsory masks became an integral part of outdoor sports such as jogging in crowded areas (e.g. city parks) as well as indoor sports in... (Randomized Controlled Trial)
Randomized Controlled Trial
BACKGROUND
During the COVID-19 pandemic, compulsory masks became an integral part of outdoor sports such as jogging in crowded areas (e.g. city parks) as well as indoor sports in gyms and sports centers. This study, therefore, aimed to investigate the effects of medical face masks on performance and cardiorespiratory parameters in athletes.
METHODS
In a randomized, cross-over design, 16 well-trained athletes (age 27 ± 7 years, peak oxygen consumption 56.2 ± 5.6 ml kg min, maximum performance 5.1 ± 0.5 Watt kg) underwent three stepwise incremental exercise tests to exhaustion without mask (NM), with surgical mask (SM) and FFP2 mask (FFP2). Cardiorespiratory and metabolic responses were monitored by spiroergometry and blood lactate (BLa) testing throughout the tests.
RESULTS
There was a large effect of masks on performance with a significant reduction of maximum performance with SM (355 ± 41 Watt) and FFP2 (364 ± 43 Watt) compared to NM (377 ± 40 Watt), respectively (p < 0.001; ηp = 0.50). A large interaction effect with a reduction of both oxygen consumption (p < 0.001; ηp = 0.34) and minute ventilation (p < 0.001; ηp = 0.39) was observed. At the termination of the test with SM 11 of 16 subjects reported acute dyspnea from the suction of the wet and deformed mask. No difference in performance was observed at the individual anaerobic threshold (p = 0.90).
CONCLUSION
Both SM and to a lesser extent FFP2 were associated with reduced maximum performance, minute ventilation, and oxygen consumption. For strenuous anaerobic exercise, an FFP2 mask may be preferred over an SM.
Topics: Adult; Athletes; Athletic Performance; Bicycling; Blood Pressure; COVID-19; Cross-Over Studies; Exercise Test; Heart Rate; Humans; Male; Masks; Oxygen Consumption; SARS-CoV-2
PubMed: 34091726
DOI: 10.1007/s00392-021-01877-0