B Mirzaei; A barjaste; F Rahmani-nia
Abstract
Aim: This study aimed to examine the effect of aerobic exercise with and without BFR on blood lactate, cortisol and PGC-1α response in human skeletal muscle.
Method: On two different occasions, five healthy untrained male subjects (mean±SE; age: 33.4±1.02 years, height: 173.9±4.02 ...
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Aim: This study aimed to examine the effect of aerobic exercise with and without BFR on blood lactate, cortisol and PGC-1α response in human skeletal muscle.
Method: On two different occasions, five healthy untrained male subjects (mean±SE; age: 33.4±1.02 years, height: 173.9±4.02 cm, body mass: 79.64±4.69 kg), were required to perform (i) a BFR aerobic exercise at an exercise intensity of 40 % of VO2max; and (ii) similar exercise bouts without BFR (Ctrl). For each condition, baseline and 3 h post-exercise muscle biopsy samples (vastus lateralis) were performed for PGC-1α protein expression analysis. Venous blood samples were also collected at pre-exercise, immediately and 2 h post-exercise to measure changes in blood lactate and serum cortisol.
Results: PGC-1α protein content was significantly higher (P < 0.05) at 3-h post-exercise with BFR compared with Ctrl. Blood lactate and serum cortisol did not significantly change from baseline to immediately after exercise and at 2-h post exercise.
Conclusion: Metabolic stimuli are not a mechanism to mediate cell signaling network responsible for mitochondrial biogenesis. However, the addition of blood flow restriction during aerobic exercise induces an increase in PGC-1α to regulate mitochondrial biogenesis.
Z Khazraei Ganjifar; F Rahmani-nia
Abstract
Aim: The purpose of this study was to investigate the relationship between NT-proBNP, galactin-3 and aldosterone variables in endurance skiers after endurance skiing in height.
Method: Twenty four elite endurance skiers (age: 25 years; body fat: 14%) were divided into two groups (Experimental, Control). ...
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Aim: The purpose of this study was to investigate the relationship between NT-proBNP, galactin-3 and aldosterone variables in endurance skiers after endurance skiing in height.
Method: Twenty four elite endurance skiers (age: 25 years; body fat: 14%) were divided into two groups (Experimental, Control). The skiing program included a skiing route of 8.5 km, a mean time of 65 minutes, and an average intensity of 70-90% of the maximum oxygen consumption. The NT-proBNP values were evaluated by ELISA. A week after skiing, a ride on a treadmill was done with a slope and distance and a similar time with the ski resort. To examine the relationship between the variables studied, Pearson correlation coefficient was used at a significant level of 5% using SPSS version 22 software.
Results: : The results showed that only galatin-3 with NT-ProBNP and NT-ProBNP with aldosterone showed significant correlation in height (P<0.05).
Conclusion: Increasing physiological pressure on the heart caused by exposure to hypoxia and dehydration may lead to changes in the aldosterone and galactin-3 hormone as a fibrotic cell marker.
Bahman Mirzaei; Farhad Rahmani nia; Amir Rashidlami; Mehdi Ghahremani Moghaddam
Volume 3, Issue 2 , July 2014, , Pages 129-139
Abstract
Abstract
Aim: Aging in human is associated with a loss in neuromuscular function and performance. This is related, in part, to increased oxidative stress and decreased antioxidants status. Uric acid and bilirubin considered as two main antioxidant in blood and have a significant relationship with Total ...
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Abstract
Aim: Aging in human is associated with a loss in neuromuscular function and performance. This is related, in part, to increased oxidative stress and decreased antioxidants status. Uric acid and bilirubin considered as two main antioxidant in blood and have a significant relationship with Total Anti Oxiidait Capaciy. The aim of present study was to examin the effects of resistance exercise on total antioxidant capacity, bilirubin and uric acid in non-athlete and elderly wrestlers.
Method: 8 elderly wrestlers (age 59.75 ± 1.98, Height 172.25 ± 7.08 cm, Weight 76 ± 14.6 kg) and 7 untrained (age 61.42 ± 1.9, Height 173.14 ± 4.09 cm, Weight 79.71 ± 8.15 kg) elderly people volunteered as subject for the study. Subjects completed resistance exercise protocol including: bench press, leg extension, lat-machine pull down, leg curl, cable triceps curl and cable biceps curl with 60-70% of 1RM and with 8-12 repetitions. Blood samples were colected at pre, post and 24 hours after resistance exercise.
Results: Resistance exercise did not caused any significancant differences in indices but the baseline amount of total bilirubin and TAC was higher in athlete group, but not significantly.
Conclusion: The results of this study showed a single bout of resistance exercise had not significant effect on antioxidant status in athlete and non-athlete elderly men.
Key words: Antioxidant, Aging, Uric acid, Bilirubin, Wrestling.
Mohammad Reza Fadaei chafy; Farhad Rahmani-Nia; Hamid Mohebbi; Saed Mohsen Maddah
Volume 4, Issue 1 , May 2014, , Pages 1-14
Abstract
Aim: The purpose of this study was to investigate the effects of aerobic exercise on leptin and testosterone in obese boys’ serum at different pubertal stages. Method: The cross-sectional study had a pre-test- post-test design. The subjects included 36 obese boys aged 12 to 17 years, who according ...
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Aim: The purpose of this study was to investigate the effects of aerobic exercise on leptin and testosterone in obese boys’ serum at different pubertal stages. Method: The cross-sectional study had a pre-test- post-test design. The subjects included 36 obese boys aged 12 to 17 years, who according to the Tanner index, were in the stage of puberty of TS2 to TS5. The subjects were divided in to two groups, TS2, 3 (n=19, age: 13.4±0.94 years, Weight: 76.61±16.7 kg, BMI: 29.41±5.22 kg/m2) and TS4, 5 (n=17, age: 14.9±1.48 years, Weight: 93.57±16.48 kg, BMI: 30.92±3.88 kg/m2), each divided into aerobic exercise and control groups. After anthropometric measurements, fasting serum’s leptin and testosterone levels were measured. The aerobic exercise group completed 12 weeks of running, three times a week 30 minutes on average with an intensity of 60 to 85 percent of maximum heart rate. A pedometer was used to measure the level of physical activity and N4 software was used for measurement of energy intake. The statistical t-test, one-way and two-way ANOVA was used to analyze the data. Results: Lean body mass increased and body fat percent decreased significantly in aerobic exercise group at both stages of puberty (P≤0.05). In aerobic exercise group decrease in BMI and body fat, was only significant in TS4, 5 (P≤0.05). serum leptin levels decreased at different stages of puberty and was at only significant in aerobic exercise group (P≤0.05); but its changes in aerobic exercise and control groups at each stage of puberty wasn’t significant. Analysis of variance showed that puberty affects leptin changes (P≤0.05) but there was no significant difference between the effect of aerobic exercise on leptin decrease and changes in testosterone in both groups (TS4, 5 and TS2, 3 ) Conclusion: The results indicated that aerobic exercise in obese adolescent boys can lead to favorable changes in body composition, along with decreased serum’s leptin. However, part of these changes result from the normal maturation process that can lead to different responses to aerobic training, though due to the low number of subjects showing it about serum’s leptin, was not possible.
Hamid Mohebbi; Arsalan Damirchi; Faras Hosseino; Farhad Rahmani nia
Volume 2, Issue 1 , April 2012
Abstract
Abstract
Aim: The aim of this study was comparison between of two resistance training protocols, double pyramid and flat pyramid loading pattern, on physical fitness and body composition in young soccer players.
Method: Therefore, 39 young soccer players from Syrian super league were divided randomly ...
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Abstract
Aim: The aim of this study was comparison between of two resistance training protocols, double pyramid and flat pyramid loading pattern, on physical fitness and body composition in young soccer players.
Method: Therefore, 39 young soccer players from Syrian super league were divided randomly into three; control (age: 17.76±0.6 years, weight: 71.9±4 kg, height: 176.2±5 cm and VO2max: 40.7±1.4 ml/kg/min), double pyramid (age 17.46±0.63 years, weight: 71.9±6 kg, height: 176.1±6.7 cm and VO2max 41.2±2) and flat pyramid (age: 18.16±0.83 years, weight: 73.8±7.3 kg, height176.1±5.8 cm and VO2max: 42.3±3.6 ml/kg/min) resistance training groups. The training groups participated 3 times/wk for 8 weeks in resistance training sessions in addition to daily common soccer training sessions. The control group participated only in daily common training sessions. Results: Muscle strength was improved significantly in both double pyramid and flat pyramid loading groups after eight weeks of training (P
