scholarly journals Acute Effect on Arterial Stiffness after Performing Resistance Exercise by Using the Valsalva Manoeuvre during Exertion

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Wai Yip Vincent Mak ◽  
Wai Keung Christopher Lai

Background. Performing resistance exercise could lead to an increase in arterial stiffness.Objective. We investigate the acute effect on arterial stiffness by performing Valsalva manoeuvre during resistance exercise.Materials and Methods. Eighteen healthy young men were assigned to perform bicep curls by using two breathing techniques (exhalation and Valsalva manoeuvre during muscle contraction) on two separate study days. Carotid pulsed wave velocity (cPWV) was measured as an indicator to reflect the body central arterial stiffness using a high-resolution ultrasound system, and its value was monitored repeatedly at three predefined time intervals: before resistance exercise, immediately after exercise, and 15 minutes after exercise.Results. At the 0th minute after resistance exercise was performed using the Valsalva manoeuvre during exertion, a significant increase in cPWV (4.91 m/s ± 0.52) compared with the baseline value (4.67 m/s ± 0.32,P=0.008) was observed, and then it nearly returned to its baseline value at the 15th minute after exercise (4.66 m/s ± 0.44,P=0.010). These findings persisted after adjusting for age, body mass index, and systolic blood pressure.Conclusion. Our result suggests short duration of resistance exercise may provoke a transient increase in central arterial stiffness in healthy young men.

2017 ◽  
Vol 117 (6) ◽  
pp. 1227-1232 ◽  
Author(s):  
Yosuke Yamato ◽  
Natsuki Hasegawa ◽  
Shumpei Fujie ◽  
Shigehiko Ogoh ◽  
Motoyuki Iemitsu

2018 ◽  
Vol 9 (1) ◽  
pp. 1-5
Author(s):  
Kenta Kioi ◽  
Ryohei Yamamoto ◽  
Kohei Mori ◽  
Takuo Nomura

2010 ◽  
Vol 40 (1) ◽  
pp. 16 ◽  
Author(s):  
Eun Sun Yoon ◽  
Su Jin Jung ◽  
Sung Kun Cheun ◽  
Yoo Sung Oh ◽  
Seol Hyang Kim ◽  
...  

1997 ◽  
Vol 7 (1) ◽  
pp. 48-60 ◽  
Author(s):  
Richard R. Suminski ◽  
Robert J. Robertson ◽  
Fredric L. Goss ◽  
Silva Arslanian ◽  
Jie Kang ◽  
...  

2021 ◽  
pp. 004051752110001
Author(s):  
Pengpeng Cheng ◽  
Xianyi Zeng ◽  
Pascal Bruniaux ◽  
Jianping Wang ◽  
Daoling Chen

To study the upper body characteristics of young men, the body circumference, length, width, thickness, and angle of young men aged 18–25 and 26–35 years were collected to comprehensively characterize the concave and convex features of the front, back, and side of the human body. The Cuckoo Search-Density Peak intelligent algorithm was used to extract the feature factors of the upper body of men, and to cluster them. To verify the effectiveness of the intelligent algorithm, the clustering results of Cuckoo Search-Density Peak, Density Peak, Particle Swarm Optimization-Density Peak algorithm, Ant Colony Optimization-Density Peak algorithm, Genetic Algorithm-Density Peak algorithm, and Artificial Bee Colony-Density Peak algorithm were evaluated by Silouette and F-measures, respectively. The results show that the Cuckoo Search-Density Peak algorithm has the best clustering results and is superior to other algorithms. There are some differences in somatotype characteristics and somatotype indexes between young men aged 18–25 and 26–35 years.


Author(s):  
A.A. Chonkoeva ◽  
I.P. Mukhamedova

Foreign students studying in Kyrgyzstan mainly come from Southeast Asia, and they have to adapt to living conditions in a new climatic (geographic), socio-cultural, and educational environment that is different from the previous one. Therefore, it is challenging to study the chronostructural characteristics of the hormonal regulation of lipid and carbohydrate metabolism in students, as these characteristics are main part of the metabolic balance. The aim of the study is to determine chronostructural characteristics of lipid and carbohydrate metabolism regulation by adrenal cortex hormones in foreign and local 1st-year university students in Kyrgyzstan. Materials and Methods. The study enrolled 120 students. The average age of Indian students (30 young women and 30 young men) was 19.45±0.24 years; the average age of local students (30 young women and 30 young men) was 18.50±0.25 years. The authors analyzed correlation of daily cortisol rhythm with lipoproteins and blood serum glucose indicators. Results. The chronoeffects of evening cortisol (6 p.m.) and daily cortisol level influenced lipid blood fractions in students in both ethnic groups, however, with the opposite effect. In Indian students, cortisol chronoeffect was mainly resulted in accumulation of atherogenic fractions, while in local students – in utilization of such fractions. These opposite processes can be regarded as different phases of the same adaptive energy supply reorganization, when the body starts consuming energy from fatty acids, and activates cholesterol-dependent plastic processes with the photoperiod (autumn-winter) changes. The greatest influence on carbohydrate metabolism was exerted by the daily cortisol level and reactivity, i.e. the rate of change in its plasma concentration. As an additional energy substrate, the young women demonstrated stimulated glucose disposal and young men demonstrated glucose production. The reactivity of the diurnal cortisol rhythm was statistically significantly higher in foreign students, which indicates a reactive adaptive restructuring of regulatory mechanisms. Keywords: students, lipoproteins, adaptation, cortisol, circadian rhythm. Иностранные студенты, обучающиеся в Кыргызстане, в основном прибывают из стран Юго-Восточной Азии, и им предстоит адаптироваться к условиям жизни в новой климатической (географической), социокультурной, образовательной среде, отличной от прежней. Поэтому вызывает интерес исследование у студентов хроноструктурных особенностей гормональной регуляции липидного и углеводного обменов как основной части метаболического баланса организма. Цель: определение хроноструктурных особенностей регуляции липидного и углеводного обменов гормонами коркового слоя надпочечников у иностранных и местных студентов на начальном этапе обучения в вузах Кыргызстана. Материалы и методы. В исследование были включены 120 студентов. Средний возраст индийских студентов (30 девушек, 30 юношей) составил 19,45±0,24 года; местных студентов (30 девушек, 30 юношей) – 18,50±0,25 года. Проанализированы корреляционные связи показателей дневного ритма кортизола с липопротеинами и глюкозой сыворотки крови. Результаты. Хроноэффекты вечернего кортизола (1800) и суточная масса кортизола были наиболее значительными на липидных фракциях крови студентов в обеих этнических группах с противоположным действием. У индийских студентов все хроноэффекты кортизола были преимущественно направлены на накопление атерогенных фракций, у местных – на их утилизацию. Эти противоположные процессы можно расценивать как разные фазы одной и той же адаптационной перестройки организма в энергообеспечении при переходе на богатые жирными кислотами источники энергии, а также в активации холестеринзависимых пластических процессов в условиях измененного фотопериода (осень-зима). Наибольшее влияние на углеводный обмен оказывали дневная масса кортизола и реактивность – скорость изменения его концентрации в плазме, под влиянием которых у девушек наблюдалось стимулирование утилизации глюкозы, а у юношей – продукция глюкозы в качестве дополнительного энергетического субстрата. Реактивность дневного ритма кортизола была статистически значимо выше у иностранных студентов, что свидетельствует о реактивной адаптационной перестройке механизмов регуляции. Ключевые слова: студенты, липопротеины, адаптация, кортизол, суточный ритм.


2009 ◽  
Vol 46 (1) ◽  
pp. 27-44 ◽  
Author(s):  
Peter Kelly ◽  
Christopher Hickey

In this article we discuss the ways in which the professional identity of Australian Football League (AFL) footballers — in a physical, high body contact sport — is shaped by concerns to develop different aspects of the body, mind and soul of the young men who want to become AFL footballers. Drawing on Michel Foucault’s later work on the care of the self we argue that narratives of identity necessarily involve a struggle for the body, mind and soul of these young men. Foucault’s work enables us to identify and analyse how relations of power, forms of regulation and arts of governing interact in ongoing attempts to develop the professional footballer. The article explores these issues via an analysis of the rationalities and techniques that inform talent identification and player management practices; and risk management in relation to these practices and processes in the AFL.


2018 ◽  
Vol 40 (01) ◽  
pp. 3-8 ◽  
Author(s):  
Jun Yin ◽  
Hao Wu ◽  
Lan Yu ◽  
Jing Zhang ◽  
Weili Zhu

AbstractTo examine the acute influence of pedaling cadence on arterial stiffness in young men, 15 healthy men (21.8±0.4 years) underwent 3 trials in self-control crossover design: non-cycling control (CON), cycling at 60 (RPM60) and 90 rounds per min (RPM90). Cycling lasted 30 min at intensity of 35% heart rate reserve. Arterial stiffness in cardio-ankle vascular index (CAVI) was measured at baseline (BL), immediately after (0 min) and 40 min after cycling. There were no significant CAVI changes over time in CON. CAVI in RPM60 decreased immediately after exercise and returned to baseline afterwards (6.1±0.2, 5.6±0.2 and 6.0±0.2 at BL, 0 and 40 min, respectively). RPM90 elicited significant CAVI reduction from 6.2±0.2 at BL to 5.5±0.2 at 0 min, and reverted to 5.7±0.1 at 40 min, maintaining significant difference to its baseline. There was no significant CAVI difference between RPM60 and CON, whereas CAVI in RPM90 was significantly lower than that in CON at 0 min (5.5±0.2 vs 6.1±0.2, P<0.01) and 40 min (5.7±0.1 vs 6.3±0.1, P<0.05). Despite equivalent exercise volume, arterial stiffness improvement induced by cycling was influenced by pedaling cadence. Higher cadence resulted in superior effect on arterial stiffness.


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