scholarly journals DIFFERENCES IN MAXIMUM OXYGEN CONSUMPTION OF FOOTBALL PLAYERS OF DIFFERENT POSITIONS IN THE TEAM

2021 ◽  
pp. 13-18
Author(s):  
Vladimir Ivanek ◽  
Branko Đukić ◽  
Branimir Mikić ◽  
Mane Mirković ◽  
Martina Rezić
Keyword(s):  
Oxygen Consumption ◽  
Statistical Significance ◽  
Body Height ◽  
Morphological Characteristics ◽  
Football Players ◽  
Functional Abilities ◽  
Maximum Oxygen Consumption ◽  
Training Process ◽  
Starting Point ◽  
Significant Difference

The aim of this research is to determine the differences between the aerobic functional abilities of football players from different positions in the team, which should serve as a starting point in planning and monitoring the training process of football players. VO2max, as a basic parameter of functional abilities, was obtained by applying a laboratory progressive test on the treadmill. The sample of respondents was composed of 57 respondents (GOD = 22.47 ± 3.78SD), football players of clubs competing in the first and second leagues of Serbia from the area of Vojvodina, of which 8 goalkeepers, 16 defensive, 17 midfielders and 16 attackers. To test the functional capabilities (oxygen consumption - VOmax), we used a test of progressive continuous load on the treadmill with increasing load per minute through a "breath-by-breath" gas analyzer (Quark PFT ErgoCPET, Cosmed, Italy), which gave data on ventilation and spiroergometric parameters of the subjects by different positions in the team. Anthropometric measures of body weight- (TM) and body height- (TV) were applied to test the morphological characteristics of the subjects. SPSS 20.0 software package was used for data processing. In order to determine the statistically significant differences of the measured variables between football players by positions, a one-factor anova of different groups, the level of statistical significance (p <0.05) was used. The obtained results of maximum oxygen consumption indicated that there is a statistically significant difference in aerobic abilities between goalkeepers and players in other positions, and they are certainly a consequence of the physiological requirements placed before them and the different training process. The highest mean value of VO2 max had midfielders (53.3 ± 1.9 ml / kg / min), followed by attackers (52.9 ± 4.4 ml / kg / min), defensive players (51.8 ± 3, 3 ml / kg / min) while the lowest values were recorded in the goalkeeper (50.5 ± 1.8 ml / kg / min). There is a logical conclusion that the need for running midfielders is the greatest, and the goalkeeper the least, and that the results are the result of training processes and different requirements for individual positions in the team.

Effect of Different Types of Lower-limb Exercise on Blood Pressure in Hypertensive People: A Randomized, Double-blind Controlled Clinical Trial

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Rozita Hedayti ◽  
Salimeh Mahmoodi ◽  
Rasool Bagheri ◽  
Marjan Biglary ◽  
Amir Hoshang Bakhtiary ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Oxygen Consumption ◽  
Diastolic Blood Pressure ◽  
Controlled Clinical Trial ◽  
Maximum Oxygen Consumption ◽  
Exercise Interventions ◽  
Concentric Exercise ◽  
Significant Difference

Objectives: The current study aimed at determining the immediate and long-lasting effects of eccentric and concentric exercises on hypertension in individuals with high blood pressure. Methods: A total of 45 hypertensive volunteers were randomly assigned to three intervention groups as eccentric exercise (n = 15), concentric exercise (n = 15), and control (n = 15) groups. All the volunteers underwent exercise interventions for four weeks, three sessions per week (12 sessions in total) as treadmill walking with +10% gradient (concentric group), -10% gradient (eccentric group), or neutral gradient. Before the intervention, immediately after the first session of the intervention, after the end of the intervention, and 48 hours after the end of the intervention, systolic and diastolic blood pressure, heart rate, and maximum oxygen consumption were measured and compared between the groups. Results: The positive gradient group had higher diastolic blood pressure 48 h after the intervention than the negative and neutral gradient groups (P < 0.05). There was no significant difference in the other study variables between eccentric and concentric exercise groups (P > 0.05). Statistical analysis showed that eccentric exercises immediately reduced systolic and diastolic blood pressure (P < 0.05). Eccentric and constrictive exercises reduced systolic and diastolic blood pressure for the long term (P < 0.05). Exonerative and constrictive exercises improved the heart rate, maximum oxygen consumption, and systolic blood and diastolic blood pressure in the short and long term (P < 0.05). Conclusions: Eccentric and concentric exercises with immediate and long-lasting effects improved systolic and diastolic blood pressure, as well as heart rate and maximum oxygen consumption. No significant difference was found between the two types of exercises in terms of the variables studied.

scholarly journals Differences in the bioenergetic potential of athletes participating in team sports

2013 ◽  
Vol 70 (7) ◽  
pp. 633-636 ◽  
Author(s):  
Julijan Malacko ◽  
Dragan Doder ◽  
Slavisa Djurdjevic ◽  
Biljana Savic ◽  
Radoslava Doder
Keyword(s):  
Oxygen Consumption ◽  
Technology Assessment ◽  
Sport Activity ◽  
Team Sports ◽  
Football Players ◽  
Functional Abilities ◽  
Standard Laboratory ◽  
Basketball Players ◽  
Univariate Anova ◽  
Laboratory Procedures

Background/Aim. In modern training technology, assessment of aerobic bioenergetic potential in athletes is commonly performed by standard laboratory procedures to determine basic or specific functional abilities for specific sport activity or discipline. The aim of study was to assess the aerobic bioenergetic potential of athletes participating in basketball, football and handball. Methods. The study included 87 athletes (29 basketball players, 29 football players, and 29 handball players) aged 21-24. Evaluation of the aerobic bioenergetic potential of athletes participating in basketball, football and handball was performed followed by both univariate (ANOVA) and multivariate (MANOVA) statistical methods to determine differences among the athletes in relative (VO2 mL/kg/min) and absolute oxygen consumption (VO2 L/min). Results. Statistically significant differences between absolute and relative oxygen consumption were found in basketball players (Mb), football players (Mf), and handball players (Mh) (MANOVA, p = 0.00). ANOVA also revealed significant differences in relative oxygen consumption (VO2 mL/kg/min) (p = 0.00). The football players (55.32 mL/kg/min) had the highest relative oxygen consumption, followed by the handball players (51.84 mL/kg/min) and basketball players (47.00 mL/kg/min). The highest absolute oxygen consumption was recorded in the basketball players (4.47 L/min), followed by the handball players (4.40 L/min) and footballers (4.16 L/min). Conclusion. Statistically significant differences in the aerobic bioenergetic potential, expressed by the relative oxygen consumption were found among atletes participating in different team sports. It can be assumed that the player from the sports in which it is necessary to cross greater distance in total during the match have a greater need for aerobic capacity.

scholarly journals Anthropometric characteristics of professional football players in relation to the playing position and their significance for success in the game

2019 ◽  
Vol 23 (5) ◽  
pp. 224-230
Author(s):  
M. Joksimović ◽  
I. Skrypchenko ◽  
K. Yarymbash ◽  
D. Fulurija ◽  
S. Nasrolahi ◽  
...  
Keyword(s):  
Body Mass Index ◽  
Body Mass ◽  
Body Height ◽  
Morphological Characteristics ◽  
The Body ◽  
Football Players ◽  
Professional Football ◽  
Important Indicator ◽  
National Team ◽  
Anthropometric Characteristics

Background: Football is a game in which anthropometric characteristics are important factors for specific player positions, where morphological characteristics differ in relation to the competitive level and the position in the game. Body composition is an important indicator of the physical fitness and general health of athletes so today its often discussed in scientific literature. The aim of the research was to determine the differences in the anthropometric characteristics of the professional football players in relation to the player's position and to determine their importance in the game. Material: Twenty-nine male football players of the national team of Serbia participated in the research, in which the body height, weight and Body mass index were measured. Results: The results of the study indicate that statistically significant differences in body height and body weight were recorded between goalkeepers and midfielders (p <0.01) and goalkeepers and attackers (p <0.05) in favor of goalkeepers, while no statistically significant differences were recorded in the Body Mass Index. The lowest height, weight and BMI were recorded in the midfielders. Conclusions: Based on the results of the research it can be concluded that the morphological characteristics have a vital role in determining the success of athletes. Football coaches can use the results of this study as a means to better understand and interpret anthropometric characteristics and their importance in relation to the gaming position. The acquaintance of noticed differences could improve the training process as well as the selection at the early age.

scholarly journals Assessment of professional Argentine football players using the UNCa test

2021 ◽  
Vol 38 (5) ◽  
pp. 327-331
Author(s):  
Martin Fernando Bruzzese ◽  
Nelio Eduardo Bazán ◽  
Nicolás Antonio Echandia ◽  
Leandro Gabriel Vilariño Codina ◽  
Hugo Alberto Tinti ◽  
...  
Keyword(s):  
Oxygen Consumption ◽  
Soccer Players ◽  
Test Material ◽  
Football Players ◽  
Maximum Oxygen Consumption ◽  
Gas Analyzer ◽  
Professional Soccer ◽  
Gas Measurement ◽  
First Time ◽  
Final Speed

Objective: To evaluate the maximum oxygen consumption (VO2max) and the Maximum Aerobic Speed (MAS) with direct and portable measurement in field, in professional soccer players using the UNCa test. Material and method: 9 professional soccer players (age: 26.8±5.12 years, mass: 78.7±5.8 kg, height: 177.3±5.8 cm), belonging to the first and promotion categories of AFA soccer league, were measured in the field with the UNCa test using direct gas measurement. A subsample of 3 players was also measured on treadmill. On treadmill and in the field, the same Medgraphics® VO2000 gas analyzer was used. Results: In the field, a VO2max of 52.18±5.86 ml/kg/min, and a MAS of 14.8±1.3 km/h were found. Also, a correlation between VO2max and MAS of r = 0.75, and between MAS and the final speed reached (FSR) r=0.91. In the subsample, no differences were found between treadmill and field in VO2max; 46.6±1.4 ml/kg/min and 48.1±2.2 ml/kg/min (p <0.001) respectively. Differences between MAS are shown; 17.0±0.0 km/h for the treadmill and 13.7±1.5 km/h for the field (p <0.001) replicating the protocol. Conclusion: If professional players of the Argentine Football Association (AFA) were measured directly and in the field, applying the UNCa test for the first time. The VO2max and MAS values were slightly lower than those published in the bibliography

BODY BUILT AND PHYSICAL FITNESS OF 14-16-YEAR-OLD FOOTBALL PLAYERS AS COMPARED WITH NON-TRAINING PEERS

2018 ◽  
Vol 28 (82) ◽  
pp. 53-60
Author(s):  
Monika Opanowska ◽  
Elżbieta Prętkiewicz-Abacjew ◽  
Barbara Wilk ◽  
Marcin Pasek ◽  
Paweł Skonieczny ◽  
...  
Keyword(s):  
Physical Fitness ◽  
Pearson Correlation ◽  
Statistical Significance ◽  
Body Height ◽  
The Body ◽  
Lower Limbs ◽  
Football Players ◽  
Somatic Development ◽  
Motor Abilities ◽  
Football Training

Aim: The objective of the study was the assessment of somatic build and physical fitness of 14-16-year-old football players as compared with non-training peers as well as relation between their body-build and physical fitness. Basic procedures: 108 football players and 101 non-training boys participated in the research. The level of somatic development of boys was assessed on the basis of body height and weight measurements, which were used to determine BMI and Rohrer index. Additionally functional length of left and right lower limbs was determined. The level of physical fitness was tested by EUROFIT. The strength and relation between body built features and physical fitness were measured by the Pearson correlation coefficient r linear, and by the test t to define its significance. Results: Football players and non-training boys characterized leptosomatic build type. Only 14-year-old footballers were higher in terms of statistical significance and had longer lower limbs in comparison with non-training peers. In physical fitness tests football players had better scores than non-training ones, and the differences of statistical significance most frequently occurring in 14-year-olds were demonstrated. Conclusion. The assessed motor abilities forming physical fitness of football players and non-training peers indicated clear correlations with body built only in 14-year-old boys. Rare occurrence of smaller correlations in 15-16-year-old football players can suggest that football training created a certain structure of physical fitness, different from that of non-training peers, but in most cases it was not related to the body structure.

The Effect of Massage on Oxygen Consumption at Rest

1995 ◽  
Vol 23 (01) ◽  
pp. 37-41 ◽  
Author(s):  
Tommy Boone ◽  
Rae Cooper
Keyword(s):  
Cardiac Output ◽  
Oxygen Consumption ◽  
Healthy Adult ◽  
Statistical Significance ◽  
Lower Extremities ◽  
Treatment Session ◽  
Adult Males ◽  
Significant Difference ◽  
Metabolic Measurement ◽  
Oxygen Difference

This study determined the effect of massage on oxygen consumption at rest. Ten healthy, adult males (mean age = 28 years) volunteered to serve as subjects. During the Control Session, each subject was placed in the supine position on a massage table to remain motionless for 30 minutes. During the Treatment Session, each subject received a 30-minute sports massage of the lower extremities. Oxygen consumption was determined via the Beckman Metabolic Measurement Cart, which was upgraded to estimate cardiac output using the CO 2 rebreathing (equilibrium) method. Paired t-tests were used for all tests of statistical significance. There was no significant difference in the subjects' oxygen consumption with the massage. Also, there were no significant differences in heart rate, stroke volume, cardiac output, and arteriovenous oxygen difference during the massage. These findings indicate (1) that massaging the lower extremities results in neither an increase nor a decrease in the subjects' expenditure of energy at rest and (2) that the energy cost of metabolism at rest is determined by the same central and/or peripheral adjustments.

scholarly journals Magnetic resonance imaging study of corpus callosum abnormalities in patients with different subtypes of schizophrenia

2014 ◽  
Vol 20 (4) ◽  
pp. 7
Author(s):  
Ebru Unlu ◽  
Erman Bagcioglu ◽  
Mehtap B Acay ◽  
Emre Kacar ◽  
Ozan Turamanlar ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Corpus Callosum ◽  
Brain Volume ◽  
Statistical Significance ◽  
Morphological Characteristics ◽  
Magnetic Resonance Images ◽  
Motor Area ◽  
Total Brain Volume ◽  
Total Brain ◽  
Significant Difference

<p><strong>Background.</strong> Reductions in the size of the corpus callosum (CC) have been described for schizophrenia patients, but little is known about the possible regional differences in schizophrenia subtypes (paranoid, disorganised, undifferentiated, residual). </p><p><strong>Methods. </strong>We recruited 58 chronically schizophrenic patients with different subtypes, and 31 age-and-gender matched healthy controls. The callosum was extracted from a midsagittal slice from T1 weighted magnetic resonance images, and areas of the total CC, its five subregions, CC length and total brain volume were compared between schizophrenia subtypes and controls. Five subregions were approximately matched to fibre pathways from cortical regions. </p><p><span><strong>Results. </strong>Schizophrenia patients had reduced CC total area and length when compared with controls. Disorganised and undifferentiated schizophrenics had a smaller prefrontal area, while there was no significant difference for the paranoid and residual groups. The premotor/supplementary motor area was smaller in all schizophrenia subtypes. The motor area was smaller only in the disorganised group. A smaller sensory area was found in all subtypes except the residual group. Parietal, temporal and occipital areas were smaller in the paranoid and undifferentiated groups. Total brain volume was smaller in all schizophrenia subtypes compared with controls, but did not reach statistical significance. </span></p><p><strong>Conclusion. </strong>These findings suggest that the heterogeneity of symptoms may lead to the different CC morphological characteristics in schizophrenia subtypes.</p>

Analogy Seeded Mind-Maps: A Comparison of Verbal and Pictorial Representation of Analogies in the Concept Generation Process

2016 ◽  
Author(s):  
K. Scott Marshall ◽  
Richard Crawford ◽  
Daniel Jensen
Keyword(s):  
Statistical Significance ◽  
Pictorial Representation ◽  
P Value ◽  
Generation Process ◽  
Concept Generation ◽  
Generation Task ◽  
Starting Point ◽  
Significant Difference ◽  
Mind Maps ◽  
Key Terms

Recent research has investigated methods based on design-by-analogy meant to enhance concept generation. While these analogies can be developed in different ways and can come from many different areas, one of the most common methods is to use key customer needs or key functions as the starting point. One approach uses these key terms to seed a search for grammatically similar words. While these methods are promising, they can be cumbersome and difficult to apply in engineering classrooms or industrial product development settings. This paper presents further evaluation of the Analogy Seeded Mind-Maps method, a new method to prompt generation of analogous solution principles drawn from multiple analogical domains. We randomly select a set of 10–15 words from a graph of grammatically analogical synonyms of a functional design requirement “seed” and populate the first-level nodes of a mind-map with the selected textual analogies. This mind-map then serves as a visual tool that is utilized during the concept generation process. The effectiveness of the tool in generating concepts has been evaluated in previous studies. In the current study, we evaluate the effect of substituting pictures for the verbal analogies in the Analogy Seeded Mind-Maps method. The study involved student volunteers who were recruited from a senior-level design methodology course. The students were asked to complete a simple concept generation task (in teams) using either a purely verbal version of the Analogy Seeded Mind-Maps method or the alternative version that relied on pictorial analogies. The results were evaluated for quantity, quality and novelty of the concepts generated using the two methods. Analysis of the results shows that there is a statistically significant difference in the novelty of ideas generated by the two methods, with the pictorial version producing a larger number of novel ideas than the purely verbal version. While the differences in quantity and quality are not statistically significant at the P-Value < 0.05 level, there are differences that approach this level of statistical significance. Further studies are needed to determine if there is any benefit to a method that combines both verbal and pictorial analogies.

scholarly journals Validity of the Actiheart step test for the estimation of maximum oxygen consumption in endurance athletes and healthy controls

2019 ◽  
Author(s):  
Juliane Heydenreich ◽  
Yves Schutz ◽  
Katarina Melzer ◽  
Bengt Kayser
Keyword(s):  
Heart Rate ◽  
Oxygen Consumption ◽  
Repeated Measures ◽  
Resting Metabolic Rate ◽  
Total Sample ◽  
Step Test ◽  
Maximum Oxygen Consumption ◽  
Entry Modes ◽  
Significant Difference ◽  
Level Of Significance

Submaximal step tests are often used for estimation of maximum oxygen consumption (VO2max) in humans. The validity of the Actiheart step test for VO2max estimation was not fully studied yet. Therefore, purpose of the study was to estimate VO2max using the Actiheart step test and to compare the data with measured VO2max in endurance trained athletes (ATH) and healthy non-athletes (CON).68 ATH (54% men, 28.0±5.4 yrs, 20.9±1.7 kg∙m-2) and 63 CON (46% men, 27.6±5.1 yrs, 22.1±1.7 kg∙m-2) performed the Actiheart step test and a spiroergometry for assessment of VO2max. In addition, resting metabolic rate (RMR; indirect calorimetry), maximum heart rate (HRmax; heart rate monitoring system during spiroergometry), and sleeping heart rate (SHR; Actiheart 6-day long term measurement) were determined. Validity of two different Actiheart software entry modes was assessed: (1) AHraw (estimated RMR [Schofield] and HRmax [Tanaka], SHR = 70 bpm) and (2) AHcomplete (measured RMR, HRmax, and SHR). Validity was investigated using linear regression (R2 and standard error of the estimate (SEE)) and repeated-measures ANOVA with a Bonferroni post-hoc correction. The level of significance was set to α=0.05.VO2max estimated by AHraw was significant related to measured VO2max in women CON (R2=0.22; p<0.05), whereas when VO2max was estimated by AHcomplete the relation was significant in women ATH and CON, and in men CON (R2=0.17-0.24; p<0.05). AHraw significantly underestimated VO2max in the total sample by 8% (51.4±10.2 vs. 55.9±7.6 ml∙kg-1∙min-1; p<0.0001), whereas no significant difference between AHcomplete and the criterion method was found (57.0±11.1 vs. 55.9±7.6 ml∙kg-1∙min-1; p=0.26).The Actiheart step test is an acceptable tool for the estimation of VO2max if an error within 8% can be tolerated. However, accuracy of the VO2max prediction is much improved when entering measured variables, such as RMR, SHR, and HRmax, into the software.

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