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Acta Physiologica Hungarica

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https://www.readbyqxmd.com/read/27030635/effect-of-sex-and-menstrual-cycle-in-women-on-starting-speed-anaerobic-endurance-and-muscle-power
#1
M Wiecek, J Szymura, M Maciejczyk, J Cempla, Z Szygula
The aim of our study was to compare the indicators of starting speed, anaerobic endurance and power in women as well as men, and to investigate whether the values of these indicators differ in women during the follicular and luteal phases of the menstrual cycle. The studied group included 16 men and 16 women. The subjects performed the 20-second maximal cycling sprint test. The men performed the test twice at 14-day intervals. The women undertook the test 4 times: twice during the middle of follicular phase and twice in the middle of luteal phase in separate menstrual cycles...
March 2016: Acta Physiologica Hungarica
https://www.readbyqxmd.com/read/27030634/zinc-supplementation-prolongs-the-latency-of-hyperthermia-induced-febrile-seizures-in-rats
#2
L Aydın, S R Erdem, C Yazıcı
Some studies have shown a relationship between febrile seizures and zinc levels. The lowest dose zinc supplementation in pentylenetetrazole seizure model has a protective effect. But, zinc pretreatment has no effect in maximal electroshock model. However, it is unclear how zinc supplementation affects hyperthermia-induced febrile seizures. The aim of the present study was to investigate the effects of zinc supplementation on febrile seizures in male Sprague-Dawley rats. The rats were randomly assigned to four groups...
March 2016: Acta Physiologica Hungarica
https://www.readbyqxmd.com/read/27030633/effect-of-high-wavelengths-low-intensity-light-during-dark-period-on-physical-exercise-performance-biochemical-and-haematological-parameters-of-swimming-rats
#3
W Beck, C Gobatto
Nocturnal rodents should be assessed at an appropriate time of day, which leads to a challenge in identifying an adequate environmental light which allows animal visualisation without perturbing physiological homeostasis. Thus, we analysed the influence of high wavelength and low intensity light during dark period on physical exercise and biochemical and haematological parameters of nocturnal rats. We submitted 80 animals to an exhaustive exercise at individualised intensity under two different illuminations during dark period...
March 2016: Acta Physiologica Hungarica
https://www.readbyqxmd.com/read/27030632/cardiac-size-of-high-volume-resistance-trained-female-athletes-shaping-the-body-but-not-the-heart
#4
T Venckunas, J Simonavicius, J E Marcinkeviciene
Introduction Exercise training, besides many health benefits, may result in cardiac remodelling which is dependent on the type and amount of exercise performed. It is not clear, however, whether significant adaptation in cardiac structure is possible in females undergoing resistance type of exercise training. Rigorous high volume training of most muscle groups emphasising resistance exercises are being undertaken by athletes of some aesthetic sports such as female fitness (light bodybuilding). The impact of this type of training on cardiac adaptation has not been investigated until now...
March 2016: Acta Physiologica Hungarica
https://www.readbyqxmd.com/read/27030631/morning-melatonin-ingestion-and-diurnal-variation-of-short-term-maximal-performances-in-soccer-players
#5
K Ghattassi, O Hammouda, A Graja, N Boudhina, H Chtourou, S Hadhri, T Driss, N Souissi
Aim Very few studies have investigated the temporal specificity of melatonin (MEL) ingestion upon short-term maximal athletic performances. The aim of the present study was to explore the effect of morning MEL ingestion on cognitive and physical performances measured in the afternoon. Methods Twelve soccer players from a Tunisian squad (17.9 ± 1.3 years, 1.74 ± 0.06 m and 62.0 ± 8.8 kg) participated in the present study. They performed two testing sessions at 08:00 h, 12:00 h and 16:00 h after either MEL (5mg) or placebo (PLA) ingestion, in a randomized order...
March 2016: Acta Physiologica Hungarica
https://www.readbyqxmd.com/read/27030630/pitfalls-during-biomechanical-testing-evaluation-of-different-fixation-methods-for-measuring-tendons-endurance-properties
#6
Gy Hangody, G Pánics, G Szebényi, R Kiss, L Hangody, K Pap
The goal of the study was to find a proper technique to fix tendon grafts into an INSTRON loading machine. From 8 human cadavers, 40 grafts were collected. We removed the bone-patella tendon-bone grafts, the semitendinosus and gracilis tendons, the quadriceps tendon-bone grafts, the Achilles tendons, and the peroneus longus tendons from each lower extremity. We tested the tendon grafts with five different types of fixation devices: surgical thread (Premicron 3), general mounting clamp, wire mesh, cement fixation, and a modified clamp for an INSTRON loading machine...
March 2016: Acta Physiologica Hungarica
https://www.readbyqxmd.com/read/27030629/the-effect-of-short-term-intermittent-hypoxic-exposure-on-heart-rate-variability-in-a-sedentary-population
#7
RANDOMIZED CONTROLLED TRIAL
C A Lizamore, Y Kathiravel, J Elliott, J Hellemans, M J Hamlin
While the effects of instantaneous, single-bout exposure to hypoxia have been well researched, little is known about the autonomic response during, or as an adaptation to, repeated intermittent hypoxic exposure (IHE) in a sedentary population. Resting heart rate variability (HRV) and exercise capacity was assessed in 16 participants (8 receiving IHE, [Hyp] and 8 receiving a placebo treatment [C]) before and after a 4-week IHE intervention. Heart rate variability was also measured during an IHE session in the last week of the intervention...
March 2016: Acta Physiologica Hungarica
https://www.readbyqxmd.com/read/27030628/activity-inactivity-circadian-rhythm-shows-high-similarities-between-young-obesity-induced-rats-and-old-rats
#8
R Bravo Santos, J Delgado, J Cubero, L Franco, S Ruiz-Moyano, M Mesa, A B Rodríguez, C Uguz, C Barriga
The objective of the present study was to compare differences between elderly rats and young obesity-induced rats in their activity/inactivity circadian rhythm. The investigation was motivated by the differences reported previously for the circadian rhythms of both obese and elderly humans (and other animals), and those of healthy, young or mature individuals. Three groups of rats were formed: a young control group which was fed a standard chow for rodents; a young obesity-induced group which was fed a high-fat diet for four months; and an elderly control group with rats aged 2...
March 2016: Acta Physiologica Hungarica
https://www.readbyqxmd.com/read/27030627/protective-effects-of-quercetin-and-chronic-moderate-exercise-training-against-oxidative-stress-in-the-liver-tissue-of-streptozotocin-induced-diabetic-rats
#9
I C Chiş, A Mureşan, A Oros, A L Nagy, S Clichici
Background To investigate the protective effects of Quercetin administration associated with chronic moderate exercise (training) on oxidative stress in the liver in streptozotocin-induced diabetic rats. Methods Diabetic rats that performed exercise training were subjected to a swimming training program (1 hour/day, 5 days/week, 4 weeks). The diabetic rats received natural antioxidant, Quercetin (20 mg/kg body weight/day) for 4 weeks. At the end of the study, all animals were sacrificed and liver samples were collected for estimation: some oxidative stress markers (malondialdehyde, MDA and protein carbonyls groups, PC), the activity of antioxidant enzymes (superoxide dismutase, SOD and catalase, CAT), reduced glutathione (GSH) level and reduced (GSH) and oxidized (GSSG) glutathione ratio...
March 2016: Acta Physiologica Hungarica
https://www.readbyqxmd.com/read/27030626/rat-white-adipocytes-activate-p85-p110-pi3k-and-induce-pm-glut4-in-response-to-adrenoceptor-agonists-or-aluminum-fluoride
#10
Y Ohsaka, Y Nomura
Adipocyte responses to adrenergic and ß-adrenoceptor(-AR) (adrenoceptor) regulation are not sufficiently understood, and information helpful for elucidating the adrenoceptor-responsive machinery is insufficient. Here we show by using immunoprecipitated kinase analysis with a phosphatidylinositol 3-kinase (PI3K) p85 antibody that PI3K activation was induced by treatment with 10 or 100 µM norepinephrine (NE) for 15 min or with 10 mM aluminum fluoride (AF, a guanosine triphosphate (GTP)-binding (G) protein activator) for 20 min in white adipocytes (rat epididymal adipocytes) and that treatment with pertussis toxin (PTX, a G-protein inactivator) inhibited PI3K activation induced by the 20-min treatment with AF in the cells...
March 2016: Acta Physiologica Hungarica
https://www.readbyqxmd.com/read/27030625/prostaglandin-targeting-agents-and-spectral-heart-rate-variability-in-experimental-partial-bladder-outlet-obstruction-in-rats
#11
Ł Dobrek, A Baranowska, B Skowron, A Furgała, D Żurowski, P Thor
The purpose of this study was to determine the activity of the autonomic nervous system (ANS), using spectral analysis of the heart rate variability (HRV) in the model of partial bladder outlet obstruction (PBOO) in rats treated with selected non-steroidal anti-inflammatory drugs (NSAID): piroxicam (PRX) or meloxicam (MLX), and following administration of PGF2a prostaglandin analogue (Enzaprost F5). Neither the use of PGF2a analogue nor of MLX, caused significant changes in the HRV spectrum (except for HRV spectrum total power reduction with MLX)...
March 2016: Acta Physiologica Hungarica
https://www.readbyqxmd.com/read/27030624/role-of-mas-receptor-antagonist-a779-in-renal-hemodynamics-in-condition-of-blocked-angiotensin-ii-receptors-in-rats
#12
A Mansoori, S Oryan, M Nematbakhsh
The vasodilatory effect of angiotensin 1-7 (Ang 1-7) is exerted in the vascular bed via Mas receptor (MasR) gender dependently. However, the crosstalk between MasR and angiotensin II (Ang II) types 1 and 2 receptors (AT1R and AT2R) may change some actions of Ang 1-7 in renal circulation. In this study by blocking AT1R and AT2R, the role of MasR in kidney hemodynamics was described. In anaesthetized male and female Wistar rats, the effects of saline as vehicle and MasR blockade (A779) were tested on mean arterial pressure (MAP), renal perfusion pressure (RPP), renal blood flow (RBF), and renal vascular resistance (RVR) when both AT1R and AT2R were blocked by losartan and PD123319, respectively...
March 2016: Acta Physiologica Hungarica
https://www.readbyqxmd.com/read/27030623/averting-the-legacy-of-kidney-disease-focus-on-childhood
#13
EDITORIAL
J R Ingelfinger, K Kalantar-Zadeh, F Schaefer
No abstract text is available yet for this article.
March 2016: Acta Physiologica Hungarica
https://www.readbyqxmd.com/read/26690038/low-dietary-zinc-intake-attenuates-the-efficacy-of-2-4-thiazolidinedione-on-reducing-hyperglycemia-in-db-db-mice-short-communication
#14
Y-M Song, H-Y Hsu, M-D Chen
Zinc (Zn) has the potential of regulating the action of thiazolidinedione (TZD), an anti-diabetic drug. Since some diabetic patients cannot achieve optimal glycemic control when receiving TZD, we investigated if Zn deficiency affects TZD's efficacy in glucose metabolism. Diabetic mice were fed diets containing 3 or 30 mg/kg Zn for 6 weeks. Thereafter, all mice were oral gavaged with 2,4-thiazolidinedione. Our results showed that blood glucose values at fasting and during the glucose tolerance test were significantly higher in low-Zn mice than those of adequate-Zn mice...
December 2015: Acta Physiologica Hungarica
https://www.readbyqxmd.com/read/26690037/ace-and-actn3-genes-polymorphisms-among-female-hungarian-athletes-in-the-aspect-of-sport-disciplines
#15
E Bosnyák, E Trájer, A Udvardy, Z Komka, A Protzner, T Kováts, I Györe, M Tóth, J Pucsok, M Szmodis
The aim of the study was to determine the importance of two sport-associated gene polymorphisms, alpha-actinin-3 R577X (ACTN3) and angiotensin-converting enzyme I/D (ACE), among Hungarian athletes in different sports. The examination was carried out only on women (n = 100). Sport-specific groups were formed in order to guarantee the most homogeneous clusters. Human genomic DNA was isolated from blood, and genotyping was performed by polymerase chain reaction. To measure the differences between the participating groups, Chi-squared test was performed using Statistica 9...
December 2015: Acta Physiologica Hungarica
https://www.readbyqxmd.com/read/26690036/effect-of-6-weeks-of-whole-body-vibration-training-on-total-and-segmental-body-composition-in-healthy-young-adults
#16
J A Rubio-Arias, P Esteban, F Martínez, D J Ramos-Campo, S Mendizábal, D Berdejo-Del-Fresno, J F Jiménez-Díaz
The applied use of new technologies to enhance performance and improve health has been increasing. Initially, whole body vibration training (WBVT) was used as system to improve elite athlete performance. However, this is also used to improve body composition, especially there is a great attention on the effectiveness of WBVT to reduce fat and body weight, with a potential increase in muscle tissue. The aim of this study was to investigate the effects of a 6-week vibration-training program on total and segmental body composition in a group of physically healthy participants...
December 2015: Acta Physiologica Hungarica
https://www.readbyqxmd.com/read/26690035/the-acute-muscular-effects-of-cycling-with-and-without-different-degrees-of-blood-flow-restriction
#17
D Kim, J P Loenneke, R S Thiebaud, T Abe, M G Bemben
The aim was to compare the acute effects of work matched high intensity (75% peak aerobic capacity) aerobic exercise to low intensity (40% peak aerobic capacity) aerobic exercise with different degrees of blood flow restriction (BFR) [40% estimated arterial occlusion (40 BFR) and 60% estimated arterial occlusion (60 BFR)] on variables previously hypothesized to be important for muscle adaptation. There were no meaningful changes in torque. Anterior thigh muscle thickness was increased from baseline with high intensity cycling and 40 BFR (~2 mm increase, p ≤ 0...
December 2015: Acta Physiologica Hungarica
https://www.readbyqxmd.com/read/26690034/polar-ownindex-is-not-a-reliable-indicator-of-aerobic-training-status
#18
F Köteles, Z Dömötör, T Berkes, R Szemerszky
Polar watches with heart rate monitoring function have become popular among recreational and professional athletes. In addition to monitoring functions, they calculate a specific index called OwnIndex which is claimed to measure aerobic training status. The current research attempted to shed light on the factors determining the OwnIndex. In Study 1, OwnIndex calculated by the RS-400 Polar watch was estimated using anthropometric (gender, age, height, weight), cardiovascular (resting HR, RMSSD), and exercise-related (maximal oxygen uptake, self-reported physical activity) data of 45 young adults...
December 2015: Acta Physiologica Hungarica
https://www.readbyqxmd.com/read/26690033/the-effects-of-intermittent-hypoxia-training-on-hematological-and-aerobic-performance-in-triathletes
#19
D J Ramos-Campo, F Martínez-Sánchez, P Esteban-García, J A Rubio-Arias, V J Clemente-Suarez, J F Jiménez-Díaz
The aim of the present research was to analyze modifications on hematological and aerobic performance parameters after a 7-week intermittent hypoxia training (IHT) program. Eighteen male trained triathletes were divided in two groups: an intermittent hypoxia training group (IHTG: n: 9; 26.0 ± 6.7 years; 173.3 ± 5.9 cm; 66.4 ± 5.9 kg; VO₂max: 59.5 ± 5.0 ml/kg/min) that conducted a normoxic training plus an IHT and a control group (CG: n: 9; 29.3 ± 6.8 years; 174.9 ± 4.6 cm; 59.7 ± 6.8 kg; VO₂max: 58...
December 2015: Acta Physiologica Hungarica
https://www.readbyqxmd.com/read/26690032/correlation-between-erythropoietin-serum-levels-and-erythrocyte-susceptibility-to-lipid-peroxidation-in-elderly-with-type-2-diabetes
#20
D Gradinaru, D Margina, M Ilie, C Borsa, C Ionescu, G I Prada
Erythropoietin (EPO), a key hormone involved in red blood cell formation has been recently acknowledged for its pleiotropic actions and protective role in ageing and various pathological conditions concurrent with oxidative stress, vascular diseases and metabolic abnormalities such as diabetes mellitus. The aim of the study was to evaluate the relationship between circulating erythropoietin levels and oxidative stress biomarkers, in elderly with type 2 diabetes (T2DM). The study was carried out in 67 subjects with T2DM (69 ± 5 years; n = 37) without anemia, and aged-matched controls (70 ± 6 years; n = 30)...
December 2015: Acta Physiologica Hungarica
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