جستجوی مقالات مرتبط با کلیدواژه « anaerobic threshold » در نشریات گروه « پزشکی »

The cardiovascular system is one of the most important parts of exercise design, and the range of effect of exercise can range from the aerobic threshold to the anaerobic threshold.Therefore, this study aimed to determine the effectiveness of exercise based on the heart rate function curve in active young men.  

For this purpose, 20 young and active boys with an average age of 20 to 25 years were selected as subjects and performed the helpless test of running on a treadmill. Heart rate and blood lactic acid level equivalent to aerobic and anaerobic thresholds were determined using the Dmax method and lactate measuring device, respectively. Simultaneously with the use of a respiratory gas analysis system, changes in the volume of oxygen consumption and carbon dioxide production were measured. In this study, to analyze the data, descriptive statistical methods such as categorizing information and converting them into frequency tables, adjusting the frequency and average percentage and standard deviation of variables were used. Integration operations were also used to calculate the area under the curve.  

The results showed that to determine the aerobic and anaerobic threshold, the method based on the maximum distance from the heart rate function curve as well as the level of oxygen consumption and blood lactate can be used. The heart rate function curve is also effective in determining the effective range of exercise, the area under the curve, and the step speed equivalent to the aerobic and anaerobic thresholds.  

Therefore, it can be concluded that using the heart rate function curve model, the range of effectiveness of exercise can be determined and used as a new method in presenting exercise programs.

Prediabetes state is associated with increased oxidative stress index and reduced of antioxidants. The aim of this study was to assess the effect of 12 weeks continuous training at Fatmax intensity and anaerobic threshold, and high-intensity interval training on antioxidant enzymes and lipid peroxidation index in pre-diabetic patients.

Thirty-two pre-diabetic patients (age: 38.7 ± 4.0 yrs; body mass index: 26.9 ± 1.4 kg/m2 ; percent body fat (%): 26.1 ± 2.5; VO2Peak: 2.49 ± 0.22 l/min) were divided into 4 groups (n=8) control (CON), high-intensity interval training (HIT), continuous training at Fatmax intensity (FAT) and continuous training at anaerobic threshold (IAT) groups. Subjects of the HIT, FAT, and IAT groups run out their specific exercise training for 12 weeks. Blood Malondialdehyde (MDA), Superoxide Dismutase (SOD) and Catalase (CAT) were determined in the lab. The student’s t-test and ANCOVA were used to analyze the data.

The effect of exercise training on glucose concentration in FAT, IAT and HIT groups was 12%, 10% and 17%, respectively; the difference was significant in the training groups in comparison to CON group (p≤0.05). SOD and CAT in the training groups were significantly (p<0.05) increased when compared to the pre-training values. Also, FAT, IAT and HIT resulted in significant (p<0.05) changes in MDA compared to baseline.

The training protocols had similar effects on the insulin resistance index in prediabetic patients. Also, continuous endurance training with low- to moderate-intensity and high intensity interval training are effective protocolsfor the modulation of antioxidant enzymes and lipid peroxidation index.

The Purpose of this study examined the effect of Kinesio taping the quadriceps femurs muscle of active students on anaerobic muscle power (AMP) and the anaerobic threshold (AT) to analyze the functional value of taping on athletic performance capacity. Twenty eight male healthy students with a mean age of 22.02±2.2 years were enrolled in this study voluntarily and randomly divided into two groups of taping (n=13) and control (n=15) groups. The anaerobic muscle power (AMP) was measured by the Wingate test, and the anaerobic threshold of participants was measured by a dependent maximal treadmill protocol (Conconi Test) with a week gap. Kinesio tapes, 5 cm in width, were applied to quadriceps femurs muscles of participants. The anaerobic threshold was evaluated after 7 days taping, then after 7 days, the anaerobic muscle power was re-evaluated. Normality of data and homogeneity were tested by Shapiro–Wilk test. Paired sample t-test for within groups and independent t-test for between groups comparison were used to analyses the hypotheses (P≤0.05). The results showed that there were significant differences between pre and posttest of total time, total distance, maximum velocity, LTP1, anaerobic capacity, maximum power and anaerobic capacity ratio after taping. There were no significant differences between pre and posttest in the control group. Taping of the quadriceps femurs muscle of active students was effective on the anaerobic muscle power and the anaerobic threshold, indicating its beneficial effects for athletic performance.

Background and Purpose:

The Traditional Medicine of Iran is based on temperament. As a significant factor in creating individual differences, temperament can be effective in sports performance of human beings. The purpose of this study was to compare warm and cold temperaments with anaerobic power, anaerobic threshold and relative maximum power.

Methods and Materials:

A descriptive study was conducted on 40 dormitory single students of Ferdowsi University of Mashhad who had not regular exercise for at least past six months. Volunteers were young healthy men in the age range of 18 to 22 years. Using a standard questionnaire, their temperament was determined. Anaerobic power was measured using Rast test while anaerobic threshold value and relative maximum power were measured by Dmax method and by hamstring muscles evaluation with bodybuilder, respectively.

The number of warm tempered people was 21 and cold tempered people were 19. Significant differences were observed in cold and warm temperament groups in peak power, mean power, minimum anaerobic power (p<0.05), and maximum power (p=0.016) which was 0.61±0.07 kg in warm tempered people and 0.54±0.06 kg in cold tempered people. Moreover, the results showed that anaerobic threshold in warm temperament people (with a mean of 163.7±4.9 beats per minute) and cold temperaments (with a mean of 167.2±4.1 beats per minute) is significantly different (p=0.019).

It seems that warm tempered people have a relatively higher power in comparison to cold tempered people. They also have better anaerobic power. However, cold tempered people have an anaerobic threshold higher than those with warm temperament.

Today, Pilates and Yoga are particular popular among various groups of society. The aim of this study was to investigate the effect of eight weeks of Pilates and yoga training on the respiratory gas exchange indices of young women at anaerobic threshold moment.
In this semi-experimental study, 36 female volunteers were divided into control, Pilates and yoga groups, each including 12 subjects. The maximum consumed oxygen, anaerobic threshold and anthropometric characteristics of the subjects were measured before and after eight weeks. After the maximal test session, participants in the Pilates and yoga groups had exercise training for 8 weeks, 3 sessions in each week. Each session took 75 minutes until the eighth week and the intensity of activity gradually reached 70-85 percent of the maximum consumed oxygen. During the workout sessions, the control group did not exercise. The considered respiratory indices of the maximum test session were measured before and after eight weeks. Independent one-way ANOVA and dependent t-test were used for statistical analysis.
The results showed that despite changes in respiration indices, changes in the consumed oxygen of the anaerobic threshold moment between the three groups, as well as changes before and after eight weeks of RER in the yoga group have been significant only (p> 0.05); while changes in VT, VE,, EQO2, EQCO2, PETO2, PETCO2 and VE/VCO2 were not significant at the intra- and inert-group levels (p The research results showed that eight weeks of yoga and Pilates activities resulted in positive but insignificant changes in some indicators on the cardiovascular system of active women, such that the volume of consumed oxygen, current volume and moment verge were increased on reaching anaerobic moment. This effect is higher in yoga than Pilates; while indicators related to the efficiency of respiratory system to meet the needs of activity time after regular Pilates practice are more affected.

Studies have emphasized on the functional adaptations of respiratory system after exercise, however, the type of exercise can appear to have different consequences. Yoga is considered as an exercise to improve the physical, psychological, and social health. The aim of this research was to investigate the effect of eight weeks yoga practice on changes in respiratory gases and O2 pulse in active young women.
In this quasi-experimental study, 20 young women were randomly divided into yoga and control groups. Before starting the yoga training courses, the respiratory gases were measured with gas analyzer. After eight weeks of yoga training courses that containing yoga practices and pranayama, the respiratory gases were measured again. Data was analyzed by paired sample t-test and independent t-test with SPSS software at the confidence level of p At the end of the practice, a significant decrease was observed in respiratory exchange ratio, whereas a significant increase was found in minute ventilation, oxygen consumption, ventilator equivalent for carbon dioxide, oxygen consumption at anaerobic threshold, and maximum oxygen uptake (p The results of this study indicated that eight-week yoga delays anaerobic threshold and fatigue with changes in metabolic parameters of the respiratory system, and likely these practices can be used to improve the athletes’ performance in sports activities.

In recent years, consumption of nutrition supplements such as L-Arginine has increased in athletes in order to increase efficiency and reduce fatigue. The purpose of the present study was to examine the effects of 4 weeks of high-intensity interval training (HIT) with and without L-Arginine supplementation on anaerobic and aerobic performance in women’s futsal players. In this research study (2013), 20 healthy women futsal players in Kermanshah City, Iran, were selected by available sampling method. Subjects were randomly divided into two groups; training-supplement (n=10) and training-placebo (n=10). Both groups, in addition to futsal specific training, performed RAST (anaerobic sprint test) test as high-intensity interval training protocol, 2 sessions per week for 4 weeks. Before and after the training protocol, subjects performed Bruce and RAST tests in order to measure aerobic and anaerobic power, respectively. Blood samples were collected 30 seconds after the RAST test to measure the levels of serum lactate concentration. All data were analyzed using independent T and paired T tests. After the training, both groups showed significant increasing in VO2max and anaerobic power (p<0.05) and significant decreasing in blood lactate concentrations (p<0.05); percentage of changes were greater for the first than the second group in all three factors. Using high-intensity interval training in combination with L-Arginine lead to improvement of aerobic and anaerobic fitness in women futsal players.