Modulators of Change-of-Direction Economy After Repeated Sprints in Elite Soccer Players

2021 ◽  
pp. 1-7
Author(s):  
Filippo Dolci ◽  
Andrew E. Kilding ◽  
Tania Spiteri ◽  
Paola Chivers ◽  
Ben Piggott ◽  
...  
Keyword(s):  
Blood Lactate ◽  
Minute Ventilation ◽  
Group Analysis ◽  
Acute Effect ◽  
Running Economy ◽  
Soccer Players ◽  
Lower Body ◽  
Maximal Aerobic Capacity ◽  
Change Of Direction ◽  
Repeated Sprint

Purpose: To investigate the acute effect of repeated-sprint activity (RSA) on change-of-direction economy (assessed using shuttle running economy [SRE]) in soccer players and explore neuromuscular and cardiorespiratory characteristics that may modulate this effect. Methods: Eleven young elite male soccer players (18.5 [1.4] y old) were tested on 2 different days during a 2-week period in their preseason. On day 1, lower-body stiffness, power and force were assessed via countermovement jumps, followed by an incremental treadmill test to exhaustion to measure maximal aerobic capacity. On day 2, 2 SRE tests were performed before and after a repeated-sprint protocol with heart rate, minute ventilation, and blood lactate measured. Results: Pooled group analysis indicated no significant changes for SRE following RSA due to variability in individual responses, with a potentiation or impairment effect of up to 4.5% evident across soccer players. The SRE responses to RSA were significantly and largely correlated to players’ lower-body stiffness (r = .670; P = .024), and moderately (but not significantly) correlated to players’ force production (r = −.455; P = .237) and blood lactate after RSA (r = .327; P = .326). Conclusions: In summary, SRE response to RSA in elite male soccer players appears to be highly individual. Higher lower-body stiffness appears as a relevant physical contributor to preserve or improve SRE following RSA.

Reliability of Change-of-Direction Economy in Soccer Players

2020 ◽  
pp. 1-7 ◽  
Author(s):  
Filippo Dolci ◽  
Andrew E. Kilding ◽  
Tania Spiteri ◽  
Paola Chivers ◽  
Ben Piggott ◽  
...  
Keyword(s):  
Blood Lactate ◽  
Minute Ventilation ◽  
Running Economy ◽  
Soccer Players ◽  
Energetic Cost ◽  
Energetic Efficiency ◽  
Oxygen Cost ◽  
Good Reliability ◽  
Change Of Direction ◽  
Physiological Variables

Purpose: To evaluate the reliability of new change-of-direction-economy tests (assessing energetic efficiency when performing continuous shuttle runs) compared with common running-economy tests in soccer players Methods: Sixteen subelite, male soccer players were recruited to perform a testing battery involving running economy (RE), 10-m shuttle-running economy (SRE10), and 20-m shuttle-running economy (SRE20) at 8.4 km·h−1 mean speed on 2 different days within 48 hours. SRE10 and SRE20 consisted of continuous shuttle runs interspersed with 180° directional changes. During the RE, SRE20, and SRE10 tests, respiratory exchange ratio and oxygen uptake were collected and used to calculate the movement-economy values over any running condition as oxygen cost and energetic cost. The secondary variables (carbon dioxide production, heart rate, minute ventilation, and blood lactate) were also monitored during all tests. Results: Depending on expression (oxygen cost or energetic cost), reliability was established for RE (CV: 5.5%–5.8%; ICC = .77–.88), SRE10 (CV: 3.5%–3.8%; ICC = .78–.96), and SRE20 (CV: 3.5%–3.8%; ICC = .66–.94). All secondary physiological variables reported good reliability (CV < 10%), except for blood lactate (CV < 35.8). The RE, SRE10, and SRE20 tests show good reliability in soccer players, whereas blood lactate has the highest variability among physiological variables during the economy tests. Conclusion: The assessment of change-of-direction economy through performing 20- and 10-m shuttle runs is reliable and can be applied to evaluate soccer players’ energetic movement efficiency under more soccer-specific running conditions.

scholarly journals Relationship between Repeated Sprint Ability and Aerobic Capacity in Professional Soccer Players

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Rhys M. Jones ◽  
Christian C. Cook ◽  
Liam P. Kilduff ◽  
Zoran Milanović ◽  
Nic James ◽  
...  
Keyword(s):  
Aerobic Capacity ◽  
Significant Negative Correlation ◽  
Soccer Players ◽  
Active Recovery ◽  
Maximal Aerobic Capacity ◽  
Sprint Time ◽  
Repeated Sprint Ability ◽  
Professional Soccer ◽  
Repeated Sprint ◽  
Sprint Ability

Aim. The aim of the present study was to investigate the relationship between maximal aerobic capacity () and repeated sprint ability (RSA) in a group of professional soccer players.Methods. Forty-one professional soccer players (age  yrs, height  cm, weight  kg) were required to perform tests to assess RSA and on two separate days with at least 48 hr rest between testing sessions. Each player performed a treadmill test to determine their and a test for RSA involving the players completing  m sprints (turn after 20 m) with 20 s active recovery between each sprint.Results. There was a significant negative correlation between body mass normalised and mean sprint time () (; ) and total sprint time () (, ).Conclusion. Results of the current study indicate that is one important factor aiding soccer players in the recovery from repeated sprint type activities.

scholarly journals Effects of combined plyometric and speed training on change of direction, linear speed, and repeated sprint ability in young soccer players

Kinesiology ◽  
2020 ◽  
Vol 52 (1) ◽  
pp. 85-93
Author(s):  
Mehdi Kargarfard ◽  
Shadi Tajvand ◽  
Alireza Rabbani ◽  
Filipe Manuel Clemente ◽  
Farzad Jalilvand
Keyword(s):  
Soccer Players ◽  
Control Group ◽  
Linear Speed ◽  
Change Of Direction ◽  
Repeated Sprint Ability ◽  
Repeated Sprint ◽  
Group I ◽  
Soccer Training ◽  
Speed Training ◽  
Sprint Ability

It has been well established that plyometric and speed training have positive impacts on fitness parameters in soccer players. The aim of this study was to compare short-term effects of a combined plyometric and speed training implemented on the same or separate days of a week on change of direction (COD), linear speed (LS), and repeated sprint ability (RSA) in young soccer players. Twenty-four male players from the same U19 soccer team were distributed into one control group (CG; n=7, soccer training only) and two experimental groups performing plyometric and speed exercises on the same (CDG; n=8) or separate days (CWG; n=9) during a 6-week preparation period. Very likely moderate within-group COD improvements were observed in the CDG (ES -0.94 [-1.47 to -0.41]) and CWG (ES -0.97 [-1.52 to -0.42]) groups. Possibly small within-group RSA improvements were also observed in the CWG (ES -0.24[-0.64 to 0.16]) and CDG (ES -0.31 [-0.79 to 0.17]) groups. CWG and CDG groups showed possibly small (ES -0.28 [-0.62 to 0.06]) and very likely moderate (ES -0.80 [-1.28 to -0.32]) within-group LS improvements following the intervention, respectively. In between group analysis, a likely moderate (ES 0.71 [0.03 to 1.39]) greater LS improvement was observed in the CDG group than in the CWG group. I t is suggested to supplement normal soccer training with combined plyometric and speed exercises to improve COD, LS, and RSA performance and to implement these exercises in the same session to improve LS with a greater effect.

scholarly journals Exploring the Determinants of Repeated-Sprint Ability in Adult Women Soccer Players

2021 ◽  
Vol 18 (9) ◽  
pp. 4595
Author(s):  
Lillian Gonçalves ◽  
Filipe Manuel Clemente ◽  
Joel Ignacio Barrera ◽  
Hugo Sarmento ◽  
Francisco Tomás González-Fernández ◽  
...  
Keyword(s):  
Test Performance ◽  
Isometric Strength ◽  
Soccer Players ◽  
Adult Women ◽  
Change Of Direction ◽  
Repeated Sprint Ability ◽  
Repeated Sprint ◽  
Main Determinants ◽  
Abductor Strength ◽  
Sprint Ability

This study aimed to explore the main determinants of repeated-sprint ability (RSA) in women soccer players considering aerobic capacity, sprinting performance, change-of-direction, vertical height jump, and hip adductor/abductor isometric strength. Twenty-two women soccer players from the same team participating in the first Portuguese league were observed. Fitness assessments were performed three times during a 22-week cohort period. The following assessments were made: (i) hip abductor and adductor strength, (ii) squat and countermovement jump (height), (iii) change-of-direction test, (iv) linear sprinting at 10- and 30-m, (v) RSA test, and (vi) Yo-Yo intermittent recovery test level 1. Positive moderate correlations were found between peak minimum RSA and adductor and abductor strength (r = 0.51, p < 0.02 and r = 0.54, p < 0.01, respectively). Positive moderate correlations were also found between peak maximum RSA and adductor and abductor strength (r = 0.55, p < 0.02 and r = 0.46, p < 0.01, respectively). Lastly, a moderate negative correlation was found between fatigue index in RSA and YYIR1 test performance (r = −0.62, p < 0.004). In conclusion, abductor and adductor isometric strength-based coadjutant training programs, together with a high degree of aerobic endurance, may be suitable for inducing RSA in female soccer players.

High-intensity Interval Training Shock Microcycle Improves Running Performance but not Economy in Female Soccer Players

2020 ◽  
Author(s):  
Filippo Dolci ◽  
Andrew E. Kilding ◽  
Tania Spiteri ◽  
Paola Chivers ◽  
Benjamin Piggott ◽  
...  
Keyword(s):  
High Intensity ◽  
Interval Training ◽  
Running Economy ◽  
Soccer Players ◽  
High Intensity Interval Training ◽  
Endurance Running ◽  
Post Intervention ◽  
Change Of Direction ◽  
High Intensity Interval ◽  
Shuttle Run

AbstractThis study aimed to evaluate the effect of high-intensity interval training shock microcycles (HIITSM) on endurance, running economy and change of direction economy in female soccer players. Nineteen sub-elite female soccer players were randomised to two groups: HIITSM (10 HIIT sessions over 13 days) or HIITTRAD (4 HIIT sessions over 13 days) interventions. Endurance performance was evaluated through the 30–15 intermittent fitness test (30–15IFT); running economy over a 5-min treadmill run; and change of direction economy over two conditions: (1) 5-min 20m shuttle run, and (2) 5-min 10m shuttle run. HIITSM significantly improved 30–15IFT scores compared to baseline (+4.4%, p=0.009; d=0.96) and 30–15IFT scores relative to HIITTRAD (p=0.002; d=2.01). There was no significant interaction (group×time) for running economy and change of direction economy. Pre- to post- intervention there was a significant main time effect for blood lactate over 20m and 10m shuttle runs (p<0.001 and p=0.037, respectively), with large (d=0.93) and moderate (d=0.53) changes observed for the HIITSM over the two distances, respectively. HIITSM may be more effective than HIITTRAD to improve 30–15IFT over shorter training periods but may not affect running economy and change of direction economy.

scholarly journals Two Weeks of Repeated-Sprint Training in Soccer: To Turn or Not to Turn?

2016 ◽  
Vol 11 (8) ◽  
pp. 998-1004 ◽  
Author(s):  
Jonathan M. Taylor ◽  
Tom W. Macpherson ◽  
Shaun J. McLaren ◽  
Iain Spears ◽  
Matthew Weston
Keyword(s):  
Group Performance ◽  
Maximum Velocity ◽  
Training Group ◽  
Soccer Players ◽  
Sprint Training ◽  
Heart Rates ◽  
Change Of Direction ◽  
Training Adaptations ◽  
Repeated Sprint ◽  
Straight Line

Purpose:To compare the effects of 2 repeated-sprint training programs on fitness in soccer. Methods:Fifteen semiprofessional soccer players (age: 24 ± 4 y; body mass: 77 ± 8 kg) completed 6 repeated-sprint training sessions over a 2-week period. Players were assigned to a straight-line (STR) (n = 8; 3–4 sets of 7 × 30 m) or change of direction (CoD) (n = 7; 3–4 sets of 7 × 20-m) repeated-sprint training group. Performance measures included 5-, 10-, and 20-m sprints, countermovement jump, Illinois agility, and Yo-Yo Intermittent Recovery Test level 1 (YYIRTL1) performance. Internal (heart rate) and external (global positioning system-derived measures) training loads were monitored throughout. Data were analyzed using magnitude-based inferences. Results:Internal and external loads were higher in the STR group than in the CoD group with large differences in maximum velocity (28.7%; ±90% confidence limits, 3.3%), moderate differences in mean heart rates (7.0%; ±1.4%) and PlayerLoad (17.6%; ±8.6%), and small differences in peak heart rates (3.0%; ±1.6%). Large improvements in 5-m (STR: 9.6%; ±7.0% and CoD: 9.4%; ±3.3%), 10-m (STR: 6.6%; ±4.6% and CoD: 6.7%; ±2.2%), and 20-m (STR: 3.6; ±4.0% and CoD: 4.0; ±1.7%) sprints were observed. Large and moderate improvements in YYIRTL1 performance were observed in the STR (24.0%; ±9.3%) and CoD (31.0%; ±7.5%), respectively. Between-groups differences in outcome measures were unclear. Conclusions:Two weeks of repeated-sprint training stimulates improvements in acceleration, speed, and high-intensity running performance in soccer players. Despite STR inducing higher internal and external training loads, training adaptations were unclear between training modes, indicating a need for further research.

scholarly journals The Relationship between the Performance of Soccer Players on the Curved Sprint Test, Repeated Sprint Test, and Change-of-Direction Speed Test

2021 ◽  
Vol 11 (12) ◽  
pp. 5355
Author(s):  
Tomáš Baranovič ◽  
Erika Zemková
Keyword(s):  
Age Groups ◽  
Team Sports ◽  
Point Of View ◽  
Soccer Players ◽  
Change Of Direction ◽  
Speed Test ◽  
Repeated Sprint ◽  
The Times ◽  
The Relationship ◽  
Two Age Groups

The curved sprint test is the most commonly used test in team sports. From a practical point of view, it would be interesting to know to what extent it is related to a direct sprint and a sprint involving changes in direction. This study investigated the relationship between the times taken by soccer players in the curved sprint test, repeated sprint test involving changes in direction, and change-of-direction speed test. Two age groups of soccer players U15 and U17 (n = 22) took the curved sprint test, the repeated straight sprint test, and the repeated straight sprint test involving changes in direction. The total time taken in the curved sprint test did not differ significantly from the total time taken in the repeated straight sprint test (46.80 ± 1.85 s and 34.51 ± 1.66 s, respectively; T = 120). The total time taken in the curved sprint test was not significantly different from the total time taken in the repeated straight sprint test involving changes in direction (46.80 ± 1.85 s and 82.36 ± 4.47 s, respectively; T = 115). There was no significant correlation between the total times taken in the curved sprint test (CST) and the repeated sprint test involving changes in direction (RSCD) (r = 0.180). There was also no significant correlation between the total times taken in the curved sprint test (CST) and the repeated straight sprint test (RSST) (r = 0.301). The non-significant relationship between these abilities implies that they are independent of each other and may have to be tested and trained complementarily.

Characterising running economy and change of direction economy between soccer players of different playing positions, levels and sex.

2021 ◽  
pp. 1-25
Author(s):  
Filippo Dolci ◽  
Andrew Kilding ◽  
Tania Spiteri ◽  
Paola Chivers ◽  
Ben Piggott ◽  
...  
Keyword(s):  
Running Economy ◽  
Soccer Players ◽  
Change Of Direction
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