scholarly journals The changes in running economy during puberty in overweight and normal weight boys

2015 ◽  
Vol 7 (1) ◽  
Author(s):  
Marcin Maciejczyk ◽  
Joanna Gradek ◽  
Jadwiga Szymura ◽  
Jerzy Cempla ◽  
Magdalena Więcek ◽  
...  
Keyword(s):  
Body Composition ◽  
Oxygen Uptake ◽  
Pulmonary Ventilation ◽  
Metabolic Cost ◽  
Endurance Performance ◽  
Normal Weight ◽  
The Body ◽  
Running Economy ◽  
Important Indicator ◽  
Physiological Variables

SummaryStudy aim: running economy (RE) is important indicator of endurance performance. During puberty dynamic changes in body composition and function are observed, as such RE is also expected to change. The aim of the study was to compare the running economy (RE) in overweight and normoweight boys during a running exercise performed with constant velocity, and the assessment of changes in RE during puberty.Material and methods: the RE of the subjects was evaluated twice: at the age of 11–12 and two years later. 18 overweight and 17 normal weight boys performed a graded test and a week later a submaximal run on a mechanical treadmill. During the exercise, physiological variables (oxygen uptake, heart rate, pulmonary ventilation, tidal volume and breathing frequency) were measured.Results: the intensity of work in both tests (%VO2max, %HRmax) was significantly higher in the overweight boys and decreased with age (non significantly) in both groups. The physiological response during the run in the overweight boys was significantly higher compared to normal weight. When the oxygen uptake was expressed as VO2.BM–0.75, the RE was similar in normal weight and overweight boys. During puberty, the inter-group differences in the metabolic cost of work stay at a relatively stable level.Conclusions: the lowered endurance performance in the overweight boys during puberty remains unchanged. The changes in physiological variables during puberty in both groups occurred in a similar way – the body composition did not influence the course of these changes in puberty.

scholarly journals Eating Habits and Body Composition of International Elite Soccer Referees

2020 ◽  
Vol 71 (1) ◽  
pp. 145-153 ◽  
Author(s):  
Gabriele Mascherini ◽  
Cristian Petri ◽  
Elena Ermini ◽  
Angelo Pizzi ◽  
Antonio Ventura ◽  
...  
Keyword(s):  
Body Composition ◽  
Eating Habits ◽  
Impedance Analysis ◽  
Skinfold Thickness ◽  
Normal Weight ◽  
The Body ◽  
Body Composition Assessment ◽  
Dietary Recall ◽  
Low Level ◽  
Vitamin B9

AbstractSoccer referees are a specific group of the athletes’ population whose careers peak from 30 to 45 years old. An athlete's performance is not only determined by physical training but also by a lifestyle, e.g. eating habits. The purpose of this study was to verify current eating habits and resulting body composition of a group of elite international soccer referees. At an international FIFA seminar 60 elite international soccer referees (aged 39.2 ± 4.2 years) were enrolled. A body composition assessment was performed with skinfold thickness and bio impedance analysis, while eating habits were evaluated with a multi-pass 24-hour dietary recall. The body composition showed a normal weight condition with a fat content of 11.4 ± 2.5%. Macronutrients showed a low level of carbohydrates (43.6 ± 5.4%) and a high level of fat (40.0 ± 4.5%). Micronutrients showed a low level of calcium, potassium, zinc, magnesium, iodine, vitamin B12 and vitamin B9. Even though their body composition was within the normal range, the current eating habits of elite international soccer referees did not appear to follow the nutrition guidelines. Therefore, it would be advisable to provide knowledge on nutrition for this particular category of sports subjects, an individualized nutritional plan would be advisable, in order to achieve and maintain better performance and appropriate body composition for their role.

scholarly journals Genetic Approaches for Sports Performance: How Far Away Are We?

2019 ◽  
Vol 49 (S2) ◽  
pp. 199-204 ◽  
Author(s):  
Michael J. Joyner
Keyword(s):  
Body Size ◽  
Oxygen Uptake ◽  
Lactate Threshold ◽  
Sequence Variation ◽  
Endurance Performance ◽  
Running Economy ◽  
Sports Performance ◽  
Upper Limit ◽  
Dna Sequence Variation ◽  
Intense Training

Abstract Humans vary in their ‘natural ability’ related to sports performance. One facet of natural ability reflects so-called intrinsic ability or the ability to do well with minimal training. A second facet of natural ability is how rapidly an individual adapts to training; this is termed trainability. A third facet is the upper limit achievable after years of prolonged intense training; this represents both intrinsic ability and also trainability. There are other features of natural ability to consider, for example body size, because some events, sports, or positions favor participants of different sizes. In this context, the physiological determinants of elite endurance performance, especially running and cycling, are well known and can be used as a template to discuss these general issues. The key determinants of endurance performance include maximal oxygen uptake $$(\dot{V}{\text{O}}_{2\hbox{max} } )$$(V˙O2max), the lactate threshold, and running economy (efficiency in the case of cycling or other sports). In this article, I use these physiological determinants to explore what is known about the genetics of endurance performance. My main conclusion is that at this time there are very few, if any, obvious relationships between these key physiological determinants of performance and DNA sequence variation. Several potential reasons for this lack of relationship will be discussed.

scholarly journals Effect of Spinning Cycling Training on Body Composition in Women

2018 ◽  
Vol 6 (4) ◽  
pp. 154 ◽  
Author(s):  
Fatih Kaya ◽  
Dilek Nar ◽  
Mustafa Said Erzeybek
Keyword(s):  
Body Composition ◽  
Training Program ◽  
Repeated Measures ◽  
Normal Weight ◽  
The Body ◽  
World Health ◽  
Impedance Method ◽  
Weight Category ◽  
Short Period ◽  
Cycling Training

In this study the effects of a 6 week spinning cycling training on the body composition of women were investigated. Twelve sedentary women (32-47 years old) voluntarily participated in this study. The 6-week training program consisted of exercise sessions on 3 days per week. The intensity of the training program that was kept low in the beginning was increased in the subsequent weeks. The training sessions including the warm-up and cool down lasted for 30-60 minutes. The analyses on the body compositions were measured regularly every week with bioelectrical impedance method. In data analysis descriptive statistics and repeated-measures analysis of variance were used. In the end of the 6-week spinning workouts positive changes were observed in many parameters related to body composition. Particularly after the 3rd week the significant changes recorded were noteworthy. At the end of the 6th week those who were overweight by World Health Organization (WHO) standards moved onto normal weight category and those who were obese became overweight. In conclusion it was seen that the spinning cycling workouts were seen as as effective method to lose weight and reduce the body fat ratio among women in this age group. This exercise method may be recommended for getting good results among obese and overweight women in a short period of time.

Sprinting Ability as an Important Indicator of Performance in Elite Long-Distance Runners

2020 ◽  
Vol 15 (1) ◽  
pp. 141-145
Author(s):  
Ryo Yamanaka ◽  
Hayato Ohnuma ◽  
Ryosuke Ando ◽  
Fumiya Tanji ◽  
Toshiyuki Ohya ◽  
...  
Keyword(s):  
Correlation Analysis ◽  
Oxygen Uptake ◽  
Maximal Oxygen Uptake ◽  
Running Economy ◽  
Distance Runners ◽  
Final Phase ◽  
Improve Performance ◽  
Long Distance ◽  
Important Indicator ◽  
Sprint Time

Purpose: Increases in maximal oxygen uptake () and running economy improve performance in long-distance runners. Nevertheless, long-distance runners require sprinting ability to win, especially in the final phase of competitions. The authors determined the relationships between performance and sprinting ability, as well as other abilities in elite long-distance runners. Methods: The subjects were 12 elite long-distance runners. Mean official seasonal best times in 5000-m (5000 m-SB) and 10,000-m (10,000 m-SB) races within 1 year before or after the examination were 13:58.5 (0:18.7) and 28:37.9 (0:25.2) (mean [SD]), respectively. The authors measured 100-m and 400-m sprint times as the index of sprinting ability. They also measured and running economy ( at 300 m·min−1 of running velocity). They used a single correlation analysis to assess relationships between 5000 m-SB or 10,000 m-SB and other elements. Results: There were significant correlations between 5000 m-SB was significantly correlated with 100-m sprint time (13.3 [0.7] s; r = .68, P = .014), 400-m sprint time (56.6 [2.7] s; r = .69, P = .013), and running economy (55.5 [3.9] mL·kg−1·min−1; r = .59, P = .045). There were significant correlations between 10,000 m-SB and 100-m sprint time (r = .72, P = .009) and 400-m sprint time (r = .85, P < .001). However, there was no significant correlation between 5000 m-SB or 10,000 m-SB and (72.0 [3.8] mL·kg−1·min−1). Conclusions: The authors' data suggest that sprinting ability is an important indicator of performance in elite long-distance runners.

scholarly journals Predictive Performance Models in Long-Distance Runners: A Narrative Review

2020 ◽  
Vol 17 (21) ◽  
pp. 8289
Author(s):  
José Alvero-Cruz ◽  
Elvis Carnero ◽  
Manuel García ◽  
Fernando Alacid ◽  
Lorena Correas-Gómez ◽  
...  
Keyword(s):  
Oxygen Uptake ◽  
Maximal Oxygen Uptake ◽  
Prediction Models ◽  
Exercise Physiology ◽  
Field Tests ◽  
Training Load ◽  
Running Economy ◽  
Anthropometric Parameters ◽  
Long Distance ◽  
Physiological Variables

Physiological variables such as maximal oxygen uptake (VO2max), velocity at maximal oxygen uptake (vVO2max), running economy (RE) and changes in lactate levels are considered the main factors determining performance in long-distance races. The aim of this review was to present the mathematical models available in the literature to estimate performance in the 5000 m, 10,000 m, half-marathon and marathon events. Eighty-eight articles were identified, selections were made based on the inclusion criteria and the full text of the articles were obtained. The articles were reviewed and categorized according to demographic, anthropometric, exercise physiology and field test variables were also included by athletic specialty. A total of 58 studies were included, from 1983 to the present, distributed in the following categories: 12 in the 5000 m, 13 in the 10,000 m, 12 in the half-marathon and 21 in the marathon. A total of 136 independent variables associated with performance in long-distance races were considered, 43.4% of which pertained to variables derived from the evaluation of aerobic metabolism, 26.5% to variables associated with training load and 20.6% to anthropometric variables, body composition and somatotype components. The most closely associated variables in the prediction models for the half and full marathon specialties were the variables obtained from the laboratory tests (VO2max, vVO2max), training variables (training pace, training load) and anthropometric variables (fat mass, skinfolds). A large gap exists in predicting time in long-distance races, based on field tests. Physiological effort assessments are almost exclusive to shorter specialties (5000 m and 10,000 m). The predictor variables of the half-marathon are mainly anthropometric, but with moderate coefficients of determination. The variables of note in the marathon category are fundamentally those associated with training and those derived from physiological evaluation and anthropometric parameters.

scholarly journals BMI-BFMNU: A structural index linked to fat mass

2021 ◽  
Vol 25 (1) ◽  
pp. 104-110
Author(s):  
José Miguel Soriano del Castillo ◽  
Paola Sechi ◽  
Pietro Marco Boselli
Keyword(s):  
Body Composition ◽  
Body Mass ◽  
Normal Weight ◽  
The Body ◽  
Body Volume ◽  
Real Surface ◽  
The Real ◽  
Normal Ranges ◽  
Body Compositions

Introduction: Body mass index (BMI) provides little information on body composition. For example, two people with the same BMI might have different body compositions. In this sense, the development of a new BMI able to provide body composition information is of clinical and scientific interest. The aim of the study was to suggest a new modified BMI formula.Material and methods: A total of 108 subject, females 56 and males 52, 0-73 years old, in various physiopathological conditions were evaluated. Data were collected and processed by a program that through anthropometric measurements calculates classic BMI, volume, surface, V/S (that we can defined like a body-thickness “pseudospessore”) and the new BMI-BFMNU.Results: The basic formula (BMI =Body Mass [kg]/Height [m2]) uses the height squared as the value of the body surface, although this is only an approximation of the real surface, whereas using the real surface instead, the new BMI reflects better the ratio between the body volume and its surface. The ratio called "pseudospessore" is already used in literature from the BFMNU (Italian acronym refereed to Biologia e Fisiologia Modellistica della Nutrizione Umana) method and has been shown to be related to the amount of fat.Conclusions: Using the BMI-BFMNU, it is possible to obtain an indication of the body structure related to the amount of fat. The consequence is that the obtained numerical values do not coincide with the traditional BMI’s values and will refer to different normal ranges. For instance, a person may be in the range of normal weight for both BMI measurements, but only the BMI-BFMNU detects whether a person has a higher or lower fat content considering the individual’s category. This study opens up to new possible future developments on the application of the new BMI that will allow a more accurate assessment and classification of patients.

scholarly journals Body Composition and Cardiorespiratory Response of Male and Female Soldiers during a Simulated Attack Maneuver

2014 ◽  
Vol 7 (1) ◽  
pp. 73-79 ◽  
Author(s):  
José Fernando Jiménez Díaz ◽  
Domingo Jesús Ramos Campo ◽  
Jacobo Ángel Rubio Arias ◽  
Fernando Martínez Sánchez ◽  
Paula Esteban García ◽  
...  
Keyword(s):  
Body Composition ◽  
Oxygen Uptake ◽  
Anaerobic Threshold ◽  
The Body ◽  
Aerobic Performance ◽  
Maximal Heart Rate ◽  
Treadmill Test ◽  
Fitness Level ◽  
Combat Training ◽  
Female Soldiers

The study of organic response during combat is poorly reported in specific literature, despite being essential to improve soldiers training. The aim of the present research was to study the body composition and organic response during a treadmill test simulating the attack maneuver of a light infantry company, studying the differences between soldiers gender. Body composition and organic response in the treadmill test were analyzed in 27 healthy professional soldiers. Body weight was lower and fat mass was higher in female soldiers, and height and muscle mass were higher in male soldiers. In treadmill test, values of maximal oxygen uptake (VO2), oxygen uptake at anaerobic threshold and maximal heart rate (HR) and HR at anaerobic threshold, were higher in male soldiers (male vs. female: 51.9±1.2 vs. 50.4±1.3 ml/kg/min; 3278.9±93.9 vs. 2721.8 ml/min; 194.2±1.9 vs. 184.0±6.6 bpm; 181.3±1.8 vs. 171.4±1.7 bpm respectively). During simulated attack maneuver female soldiers presented lower VO2 and higher HR than male soldiers, showing a worse physical fitness level. These data could be used by military coach to improve specific combat training. It is also recommended a decrease in the weigh carried by soldiers and to improve their aerobic performance to maximize the efficiency in last phases of combat maneuvers.

scholarly journals EFFECTS OF NORDIC WALKING ON BODY COMPOSITION AND FUNCTIONAL ABILITY: A CASE STUDY

2019 ◽  
pp. 299
Author(s):  
Jelena Ivanović ◽  
Aco Gajević ◽  
Ivanka Gajić ◽  
Dragan Atanasov
Keyword(s):  
Body Composition ◽  
Oxygen Uptake ◽  
Body Fat ◽  
Maximal Oxygen Uptake ◽  
Functional Ability ◽  
The Body ◽  
Fat Free Mass ◽  
Body Fat Mass ◽  
Nordic Walking ◽  
Fitness Index

The main goal of this research is to determine effect of the ten–weeks-long programmed Nordic Walking (NW) exercising to body composition and functional ability on 68 old year woman. For the evaluation of body composition, the following variables were obtained using the Bioelectric Impedance: Body mass, Body Mass Index, Body Fat Mass, Percentage of the Body Fat Mass and Fat Free Mass. For the evaluation of the functional capability, the UKK 2 km test was used and the following variables were followed: Maximal oxygen uptake and Fitness index. The program was based on aerobic exercise, with the aim of adjusting the body to physical exercise and training to improve muscle strength. The program consisted of a combination of NW and exercises for warming up, tightening and strengthening of the complete musculature. The results showed significant improvements in all observed characteristics, especially in functional parameters. Maximal oxygen uptake and Fitness index, in the end, compared to the initial measurement, improved by almost 61% (from 17.91 ml/kg/min to 29.62 ml/kg/min) and 63% (from 68 at 109). In addition, the results showed that the trend of changes in all observed characteristics has a significant increase at the level of 89.88% (for Fat free mass) to 98.73% (Fitness index). Continued application of the proposed program could contribute to the improvement of the examined variables related to body composition and functional capacity, which can result in better health status of the target population.

scholarly journals Changes in Endurance Performance in Young Athletes During Two Training Seasons

2015 ◽  
Vol 49 (1) ◽  
pp. 149-158 ◽  
Author(s):  
Łukasz Tota ◽  
Marcin Maciejczyk ◽  
Ilona Pokora ◽  
Jerzy Cempla ◽  
Wanda Pilch ◽  
...  
Keyword(s):  
Oxygen Uptake ◽  
Maximal Oxygen Uptake ◽  
Female Athletes ◽  
Ventilatory Threshold ◽  
Endurance Performance ◽  
Relative Volume ◽  
Running Economy ◽  
Track And Field ◽  
First Year ◽  
Exercise Tests

Abstract The aim of the study was to assess changes in endurance performance in young runners (females and males) during two training seasons. It involved 19 male and 16 female athletes aged 15-17 specializing in track-and-field middle and long distances runs. The following parameters were measured three times during the training season: maximal oxygen uptake, running economy, and the level of the second ventilatory threshold. Training volume and intensity during each season were analyzed within an 8-week period prior to the exercise tests. The volume and intensity of training at various stages of preparation in both seasons were similar. During the first year of observation, significant improvements in relative volume of maximal oxygen uptake were reported both in female and male athletes. During the second training season, it was found that running economy improved both in women and men, with no changes in maximal oxygen uptake. The same (in terms of volume and intensity) endurance training carried out with young runners during two consecutive training seasons can result in different training effects.

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