A 3-min All-out Upper-body Ergometer Test For Competitive Swimmers

2020 ◽  
Author(s):  
Nikolai Baastrup Nordsborg ◽  
Jerónimo Aragón-Vela ◽  
Thomas Bonne ◽  
Magni Mohr
Keyword(s):  
Peak Power ◽  
Critical Speed ◽  
Critical Power ◽  
Swimming Performance ◽  
Upper Body ◽  
Strong Correlations ◽  
Elite Swimmers ◽  
And Performance ◽  
Ergometer Test ◽  
Competitive Swimmers

AbstractWe examined the application of a land-based swimming ergometer 3-min all-out test to determine physiological predictors of swimming performance. Fourteen young elite swimmers participated (males: n=6; females: n=8). The swimmers completed two 3-min upper-body all-out tests on a swimming ergometer. Additionally, the swimmers completed freestyle swim races ranging from 50 m to 1500 m. High test-retest reproducibility (r=0.98 and coefficient of variation values <7.5%) was evident for ergometer derived peak, mean and critical power. Very strong correlations (r>0.87, p<0.001) were obtained between the 200-, 400-, 800- and 1500-m swimming performances and derived critical speed. Moreover, correlations were found between peak force and peak power and 50-m performance, in addition to critical power and performance for all distances. The critical speed was the dominant predictor of 200- to 1500-m performances (r=0.84−0.99). In conclusion, the land-based 3-min all-out swimming ergometer test is reliable and valid in predicting swimming performance in competitive swimmers and evaluates important physiological components in swimmers independent of technical abilities.

Simulated front crawl swimming performance related to critical speed and critical power

1998 ◽  
Vol 30 (1) ◽  
pp. 144-151 ◽  
Author(s):  
HUUB M. TOUSSAINT ◽  
KOHJI WAKAYOSHI ◽  
A. PETER HOLLANDER ◽  
FUTOSHI OGITA
Keyword(s):  
Critical Speed ◽  
Critical Power ◽  
Swimming Performance ◽  
Front Crawl

scholarly journals Relationship between Swimming Performance, Biomechanical Variables and the Calculated Predicted 1-RM Push-up in Competitive Swimmers

2021 ◽  
Vol 18 (21) ◽  
pp. 11395
Author(s):  
Sofiene Amara ◽  
Oussama Gaied Chortane ◽  
Yassine Negra ◽  
Raouf Hammami ◽  
Riadh Khalifa ◽  
...  
Keyword(s):  
Swimming Performance ◽  
Body Height ◽  
Upper Body ◽  
Stroke Index ◽  
Front Crawl ◽  
Body Strength ◽  
Velocity Relationship ◽  
Upper Body Strength ◽  
Competitive Swimmers ◽  
Push Up

One repetition maximum (1RM) push-ups, based upon the load–velocity relationship, are able to predict the maximum upper body strength. The aim of the present study was to examine the relationship between the predicted 1RM push-up based upon the load–velocity relationship and swimming performance and kinematical variables in competitive swimmers. Thirty-three competitive male swimmers (age = 16.46 ± 0.59 years, body mass = 72.82 ± 8.41 kg, body height = 180.56 ± 5.69 cm) performed push-up exercises without a weight vest and with a 10, 20 and 30 kg weight vests. A load–velocity relationship was established as a product of the load and velocity of the push-up per participant, and the equation was used to establish a predicted 1RM. Our findings showed a predicted 1RM push-up of 82.98 ± 9.95 kg. Pearson correlations revealed a nearly perfect relationship between the 1RM push-up and the 25 or 50 m front crawl (r = −0.968, r = −0.955), and between 1RM push-up and the 25 or 50 m front crawl with arms (r = −0.955, r = x0.941). Similarly, our results revealed significant near-perfect correlations between 1RM push-up and kinematical variables (r = 0.93–0.96) except the stroke index, which had a large relationship (r = 0.56). This study suggests that swimming performance and kinematical variables are correlated with the predicted 1RM push-up. The 1RM push-up based upon the load–velocity relationship is a low cost and time-effective alternative for swimmers and coaches to predict maximum upper body strength to optimize swimming performance in short races.

Anthropometric and Physiological Characteristics in Young Afro-Caribbean Swimmers: A Preliminary Study

2013 ◽  
Vol 8 (3) ◽  
pp. 271-278 ◽  
Author(s):  
Olivier Hue ◽  
Sophie Antoine-Jonville ◽  
Olivier Galy ◽  
Stephen Blonc
Keyword(s):  
Swimming Performance ◽  
Performance Testing ◽  
Physiological Characteristics ◽  
Jump Height ◽  
Anthropometric Parameters ◽  
Arm Span ◽  
Preliminary Study ◽  
And Performance ◽  
Competitive Swimmers ◽  
Energy Cost Of Swimming

The authors investigated the anthropometric and physiological characteristics of young Guadeloupian competitive swimmers in relation to swimming performance and compared the abilities of these children with those of the young white swimmers reported in the literature. All 2004 competitive swimmers between 10 and 14 y old (126 children, 61 boys and 65 girls, 12.0 ± 1.3 y) from Guadeloupe underwent anthropometric measurements and physiological and performance testing. Six boys on the French national swimming team are referred to hereafter as the 2011 elite subgroup. Anthropometric parameters, a jump-and-reach test, glide, and estimated aerobic power (eVO2max) were assessed in terms of swimming-performance analysis through a 400-m test. This study demonstrated that the Guadeloupian swimmers had more body fat than most age-matched white swimmers but had very poor hydrostatic lift; they had higher peak jump height and they swam as well as their white counterparts. The variability in 400-m performance between subjects was best described by glide, age, and eVO2max. Compared with the group of boys with the same age, the 2011 elite subgroup was significantly better for arm span, peak jump height, glide, and 400-m and 15-m performances. Further research is needed to investigate motor organization and energy cost of swimming in Afro-Caribbean swimmers.

scholarly journals Relationship Between Critical Power and Different Lactate Threshold Markers in Recreational Cyclists

2021 ◽  
Vol 12 ◽  
Author(s):  
Pedro L. Valenzuela ◽  
Lidia B. Alejo ◽  
Almudena Montalvo-Pérez ◽  
Jaime Gil-Cabrera ◽  
Eduardo Talavera ◽  
...  
Keyword(s):  
Power Output ◽  
Lactate Threshold ◽  
Peak Power ◽  
Critical Power ◽  
Strong Association ◽  
Peak Power Output ◽  
Strong Correlations ◽  
Limits Of Agreement ◽  
Blood Lactate Accumulation ◽  
The Relationship

Purpose: To analyze the relationship between critical power (CP) and different lactate threshold (LT2) markers in cyclists.Methods: Seventeen male recreational cyclists [33 ± 5 years, peak power output (PO) = 4.5 ± 0.7 W/kg] were included in the study. The PO associated with four different fixed (onset of blood lactate accumulation) and individualized (Dmaxexp, Dmaxpol, and LTΔ1) LT2 markers was determined during a maximal incremental cycling test, and CP was calculated from three trials of 1-, 5-, and 20-min duration. The relationship and agreement between each LT2 marker and CP were then analyzed.Results: Strong correlations (r = 0.81–0.98 for all markers) and trivial-to-small non-significant differences (Hedges’ g = 0.01–0.17, bias = 1–9 W, and p &gt; 0.05) were found between all LT2 markers and CP with the exception of Dmaxexp, which showed the strongest correlation but was slightly higher than the CP (Hedges’ g = 0.43, bias = 20 W, and p &lt; 0.001). Wide limits of agreement (LoA) were, however, found for all LT2 markers compared with CP (from ±22 W for Dmaxexp to ±52 W for Dmaxpol), and unclear to most likely practically meaningful differences (PO differences between markers &gt;1%, albeit &lt;5%) were found between markers attending to magnitude-based inferences.Conclusion: LT2 markers show a strong association and overall trivial-to-small differences with CP. Nevertheless, given the wide LoA and the likelihood of potentially meaningful differences between these endurance-related markers, caution should be employed when using them interchangeably.

scholarly journals Does the GNB3 C825T Polymorphism Influence Swimming Performance in Competitive Swimmers?

2015 ◽  
Vol 47 (1) ◽  
pp. 99-106 ◽  
Author(s):  
Agata Grenda ◽  
Marek Sawczuk ◽  
Mariusz Kaczmarczyk ◽  
Agnieszka Maciejewska ◽  
Danuta Umiastowska ◽  
...  
Keyword(s):  
Swimming Performance ◽  
Polymorphic Site ◽  
Allele Frequencies ◽  
Genotype Distribution ◽  
Long Distance ◽  
Specific Analysis ◽  
And Performance ◽  
C825t Polymorphism ◽  
Gnb3 C825t ◽  
Competitive Swimmers

Abstract Single nucleotide polymorphism C825T located within the GNB3 gene has been proposed in the literature as the performance enhancing polymorphism in highly trained athletes. Therefore, the aim of the present study was to verify the hypothesis assuming an association between the C825T polymorphic site and performance of competitive swimmers. The frequencies of C/T alleles and distribution of CC, CT and TT genotypes of the C825T GNB3 polymorphism were compared between athletes and nonathletic controls as well as between sprint and endurance swimmers. Genomic DNA was extracted from 197 competitive swimmers (50 long distance swimmers (LDS) and 147 short distance swimmers (SDS)) and 379 sedentary volunteers. The allele frequencies and genotype distribution of the C825T polymorphic site were not significantly different when LDS and SDS were compared to sedentary controls. Gender-specific analysis did not reveal any significant differences in allele and genotype distribution, neither between female controls and female swimmers nor between male controls and male swimmers. No significant differences in allele frequencies and genotype distribution were observed when LDS and SDS as well as groups of swimmers stratified by gender were compared. The results of this study do not support the hypothesis that the C825T polymorphism of the GNB3 gene is associated with swimming performance in competitive swimmers.

scholarly journals Adherence to the Mediterranean diet, is there any relationship with main indices of central fat in adolescent competitive swimmers?

2021 ◽  
Vol 38 (2) ◽  
pp. 113-118
Author(s):  
Cesare Altavilla ◽  
Annabelle Joulianos ◽  
José Miguel Comeche Guijarro ◽  
Pablo Caballero Pérez
Keyword(s):  
Mediterranean Diet ◽  
Eating Habits ◽  
Swimming Performance ◽  
Anthropometric Measures ◽  
Cross Sectional ◽  
Healthy Eating Habits ◽  
Central Fat ◽  
The Mediterranean ◽  
And Performance ◽  
Competitive Swimmers

Introduction: The relationship between adherence to the mediterranean diet and central fat of adolescent competitive swimmers is under-studied. The fat component is interesting because of its relationship to the horizontal floatation and speed during the swimming performance. An accumulation of central fat is considered a negative factor for health and performance. This study aimed to check the degree of adherence to the mediterranean diet and its relationship with some indices of central fat in competitive adolescent swimmers. Material and method: A cross-sectional descriptive study was carried out. 74 adolescent swimmers participated in the study (males n= 34, 14.5 ± 1.3 y.o., females n= 40, 13.6 ± 1.2 y.o.). The swimmers completed the KIDMED questionnaire to assess their adherence to the mediterranean diet. A II level ISAK anthropometrist carried out the anthropometric data collection at the beginning of the evening swimming session. Results: The swimmers showed a medium adherence to the mediterranean diet. Male and female swimmers showed similar KIDMED index score (males 8.09 ± 1.5, females 7.23 ± 2.2). Age seems to be a detrimental factor in the adherence to the mediterranean diet during adolescence. Female swimmers showed a significant lower waist/hip ratio compared to males (-0.028; p = 0.01). The adherence to the mediterranean diet was not correlated with the anthropometric measures of central fat. Conclusions: Regardless of the adherence to the mediterranean diet, elevated swimming activity maintains indices of central fat in healthy values. Despite there was no correlation between adherence to the mediterranean diet and the anthropometric measures of central fat, there are reasons related to health to improve healthy eating habits of adolescent competitive swimmers.

scholarly journals How cold is too cold? Establishing the minimum water temperature limits for marathon swim racing

2019 ◽  
Vol 53 (17) ◽  
pp. 1078-1084 ◽  
Author(s):  
Jane Saycell ◽  
Mitch Lomax ◽  
Heather Massey ◽  
Mike Tipton
Keyword(s):  
Water Temperature ◽  
Thermal Sensation ◽  
Swimming Performance ◽  
Open Water ◽  
Linear Rate ◽  
Metabolic Heat ◽  
The Mean ◽  
Open Water Swimming ◽  
And Performance ◽  
Competitive Swimmers

ObjectivesTo provide a rationale for minimum water temperature rules for elite and subelite marathon swim racing and highlight factors that make individuals vulnerable to excessive cooling during open water swimming.Methods12 lean competitive swimmers swam for up to 2 hours, three times in different water temperatures between 14°C and 20°C, wearing standard swimming costumes and hats. Rectal temperature (Tre), oxygen consumption, perception of cold and performance were measured.ResultsIn 16°C, half the swimmers did not complete a 2-hour swim; four became (or were predicted to become) hypothermic within 2 hours. In 18°C, three-quarters completed the swim; three became (or were predicted to become) hypothermic. In 20°C, one swimmer was predicted to become hypothermic in under 2 hours. The mean linear rate of fall of Tre was greater in 16°C (−1.57°C/hour) than 18°C (−1.07°C/hour) (p=0.03). There was no change in swimming performance during the swims or between conditions. Most of the cooling rate could be explained by metabolic heat production and morphology for both 16°C (R2=0.94, p<0.01) and 18°C (R2=0.82, p<0.01) conditions. No relationship was observed between Tre and perception of thermal sensation (r=0.25, p=0.13), and there was a weak correlation between Tre and thermal comfort (r=0.32, p=0.04).ConclusionWe recommend that 16°C and 18°C water are too cold for elite marathon swim racing. FédérationInternationale de Natation rules were changed in 2017 to make wetsuits compulsory below 18°C and optional below 20°C.

scholarly journals Pacing Strategies of 1500 m Freestyle Swimmers in the World Championships According to Their Final Position

2021 ◽  
Vol 18 (14) ◽  
pp. 7559
Author(s):  
Beatriz Lara ◽  
Juan Del Coso
Keyword(s):  
Swimming Velocity ◽  
Final Position ◽  
Men And Women ◽  
Elite Swimmers ◽  
Pacing Strategies ◽  
The World ◽  
Total Data ◽  
Fast Start ◽  
Long Course ◽  
Competitive Swimmers

In 1500 m freestyle swimming races, pacing is generally represented by a parabolic or U-shaped curve indicating that swimming velocity is greatest at the start and the last laps of the race while swimmers maintain an even pace through the middle section of the race. However, there is no information to determine if 1500 m race winners select pacing different to other, less successful swimmers within the same competition. Therefore, this investigation aimed to describe the pacing strategies adopted by 1500 m freestyle competitive swimmers in World Championships (long course), from 2003 to 2019 to determine the most effective pacing to obtain victory or a medal. The official overall and split times for 1500 m freestyle races of the Fédération Internationale de Natation (FINA) were obtained from the website of this organization. In total, data of 143 swimming performances (71 male and 72 female) were extracted. With the split times, lap times, and position were calculated across the race. To determine differences in the pacing between best- and worst-ranked finalist, swimmers in each race were divided into four groups based on the final position (1st vs. 2nd vs. 3rd vs. 4–8th). All the lap times of the winners of the race were faster than those of participants classified as 4–8th position for men and women races (p < 0.05). However, there were no differences in lap velocity among the different positions achieved at the end of the race when it was normalized by average race velocity. Additionally, there were no differences in the lap-to-lap variability among swimmers with different positions at the end of the race. In summary, both men and women elite swimmers selected parabolic pacing consisting of a fast start in the first lap, an even pace close to their average race velocity in the mid-section of the race (from 50 to 1400 m), followed by an end spurt in the final lap(s). This pattern was very similar in all finalists irrespective of the final position in the race. Hence, the obtaining of a medal in the World Championships was associated to possessing a faster average race velocity rather than a specific pacing profile through the race.

Relationships Between Propulsion and Anthropometry in Paralympic Swimmers

2015 ◽  
Vol 10 (8) ◽  
pp. 978-985 ◽  
Author(s):  
Andrew A. Dingley ◽  
David B. Pyne ◽  
Brendan Burkett
Keyword(s):  
Surface Area ◽  
Muscle Mass ◽  
Physical Disability ◽  
Swimming Performance ◽  
Upper Body ◽  
Swimming Velocity ◽  
Frontal Surface ◽  
Anthropometric Measures ◽  
Arm Span ◽  
Upper Body Power

Purpose:To characterize relationships between propulsion, anthropometry, and performance in Paralympic swimming.Methods:A cross-sectional study of swimmers (13 male, 15 female) age 20.5 ± 4.4 y was conducted. Subject locomotor categorizations were no physical disability (n = 8, classes S13–S14) and low-severity (n = 11, classes S9–S10) or midseverity disability (n = 9, classes S6–S8). Full anthropometric profiles estimated muscle mass and body fat, a bilateral swim-bench ergometer quantified upper-body power production, and 100-m time trials quantified swimming performance.Results:Correlations between ergometer mean power and swimming performance increased with degree of physical disability (low-severity male r = .65, ±0.56, and female r = .68, ±0.64; midseverity, r = .87, ±0.41, and r = .79, ±0.75). The female midseverity group showed nearperfect (positive) relationships for taller swimmers’ (with a greater muscle mass and longer arm span) swimming faster, while for female no- and low-severity-disability groups, greater muscle mass was associated with slower velocity (r = .78, ±0.43, and r = .65, ±0.66). This was supported with lighter females (with less frontal surface area) in the low-severity group being faster (r = .94, ±0.24). In a gender contrast, low-severity males with less muscle mass (r = -.64, ±0.56), high skinfolds (r = .78, ±0.43), a longer arm span (r = .58, ±0.60) or smaller frontal surface area (r = -.93, ±0.19) were detrimental to swimming-velocity production.Conclusion:Low-severity male and midseverity female Paralympic swimmers should be encouraged to develop muscle mass and upper-body power to enhance swimming performance. The generalized anthropometric measures appear to be a secondary consideration for coaches.

Design and Fabrication of Stirling Engine for Solar Power Application

2021 ◽  
Vol 143 (11) ◽  
Author(s):  
Muhammad Hassan ◽  
Hussain Ahmed Tariq ◽  
Muhammad Anwar ◽  
Talha Irfan Khan ◽  
Asif Israr
Keyword(s):  
Computer Aided Design ◽  
Peak Power ◽  
Stirling Engine ◽  
Working Fluid ◽  
Cad Model ◽  
Stroke Length ◽  
And Performance ◽  
Power Application ◽  
Aided Design ◽  
Alpha Type

Abstract This paper showcases the designing, fabrication, and performance evaluation of 90-deg alpha-type Stirling engine. The diameters of the hot and cold cylinder are 50 mm and 44 mm, respectively, with a stroke length of 70 mm. The computer-aided design (CAD) model is developed by keeping in mind the ease of manufacturing, maintenance, bearing replacements, and lubrication. After fabrication, the engine is tested by heating the hot cylinder with air as a working fluid. The engine delivered peak power of 155 watts at the temperature of 1123 K and 968 K for hot and cold cylinders, respectively. This developed prototype can be commissioned with the solar parabolic concentrator in the future based on the smooth operation while delivering power.

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