Which Metrics Can I Monitor? Test-Retest Reliability of Countermovement Jump and Countermovement Rebound Jump Force-Time Metrics in Youth Soccer Players In-Season
Objective measures provide the most effective means of monitoring the magnitude and time course of changes in neuromuscular function (NMF) resulting from physical activity if measurements are repeatable (reliability). The aim of this study was to determine the test-retest reliability of a range of r...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
International Universities Strength and Conditioning Association
2025-06-01
|
| Series: | International Journal of Strength and Conditioning |
| Subjects: | |
| Online Access: | https://journal.iusca.org/index.php/Journal/article/view/418 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850100699962015744 |
|---|---|
| author | Andrew Badby Paul Comfort Nicholas Ripley Matthew Cuthbert Francisco Robles-Palazón Peter Mundy John McMahon |
| author_facet | Andrew Badby Paul Comfort Nicholas Ripley Matthew Cuthbert Francisco Robles-Palazón Peter Mundy John McMahon |
| author_sort | Andrew Badby |
| collection | DOAJ |
| description | Objective measures provide the most effective means of monitoring the magnitude and time course of changes in neuromuscular function (NMF) resulting from physical activity if measurements are repeatable (reliability). The aim of this study was to determine the test-retest reliability of a range of ratio, outcome, strategy, and kinetic force plate metrics for the countermovement jump (CMJ) and countermovement rebound jump (CMRJ) tests in youth soccer players in the in-season period. A test-retest repeated-measures design was employed consisting of two testing sessions separated by 7-days. In each testing session, male youth soccer players (N = 43; age 17.9 ± 0.9 years, height 181 ± 5.8 cm, body mass 72.5 ± 6.8 kg) from full-time English Football League academies (categories 2 and 4) performed three maximal-effort CMJs and CMRJs in a randomised order on a Hawkin Dynamics Inc. force plate system sampled at 1000 Hz. Fifteen out of 25 CMJ, 11 out of 19 CMJ portion, and five out of 19 rebound jump (RJ) portion metrics demonstrated acceptable absolute (coefficient of variation [CV] ≤10%) and relative (intraclass correlation coefficient [ICC] ≥0.75) reliability for youth soccer players in the in-season period. The CMJ test is a feasible and reliable slow stretch-shortening cycle (SSC) test which can be utilised for monitoring acute changes in NMF in youth soccer players in-season. Practitioners should consider applying a combination of CMJ outcome, strategy, and kinetic metrics in their monitoring processes. The CMRJ test is a less feasible yet reliable fast SSC test which can be utilised for monitoring acute changes in NMF in youth soccer players in-season and can be considered an appropriate alternative to the drop jump (DJ) test as it overcame issues in DJ fall height variability identified in previous research, where acceptable reliability was demonstrated in CMJ portion bodyweight and all outcome metrics.
|
| format | Article |
| id | doaj-art-79596f070c254ed89a7de0ca6e808073 |
| institution | DOAJ |
| issn | 2634-2235 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | International Universities Strength and Conditioning Association |
| record_format | Article |
| series | International Journal of Strength and Conditioning |
| spelling | doaj-art-79596f070c254ed89a7de0ca6e8080732025-08-20T02:40:14ZengInternational Universities Strength and Conditioning AssociationInternational Journal of Strength and Conditioning2634-22352025-06-015110.47206/ijsc.v5i1.418Which Metrics Can I Monitor? Test-Retest Reliability of Countermovement Jump and Countermovement Rebound Jump Force-Time Metrics in Youth Soccer Players In-SeasonAndrew Badby0Paul Comfort1Nicholas Ripley2Matthew Cuthbert3Francisco Robles-Palazón4Peter Mundy5John McMahon6University of SalfordUniversity of SalfordUniversity of SalfordThe FA GroupUniversity of MurciaHawkin Dynamics Inc.Hawkin Dynamics Inc.Objective measures provide the most effective means of monitoring the magnitude and time course of changes in neuromuscular function (NMF) resulting from physical activity if measurements are repeatable (reliability). The aim of this study was to determine the test-retest reliability of a range of ratio, outcome, strategy, and kinetic force plate metrics for the countermovement jump (CMJ) and countermovement rebound jump (CMRJ) tests in youth soccer players in the in-season period. A test-retest repeated-measures design was employed consisting of two testing sessions separated by 7-days. In each testing session, male youth soccer players (N = 43; age 17.9 ± 0.9 years, height 181 ± 5.8 cm, body mass 72.5 ± 6.8 kg) from full-time English Football League academies (categories 2 and 4) performed three maximal-effort CMJs and CMRJs in a randomised order on a Hawkin Dynamics Inc. force plate system sampled at 1000 Hz. Fifteen out of 25 CMJ, 11 out of 19 CMJ portion, and five out of 19 rebound jump (RJ) portion metrics demonstrated acceptable absolute (coefficient of variation [CV] ≤10%) and relative (intraclass correlation coefficient [ICC] ≥0.75) reliability for youth soccer players in the in-season period. The CMJ test is a feasible and reliable slow stretch-shortening cycle (SSC) test which can be utilised for monitoring acute changes in NMF in youth soccer players in-season. Practitioners should consider applying a combination of CMJ outcome, strategy, and kinetic metrics in their monitoring processes. The CMRJ test is a less feasible yet reliable fast SSC test which can be utilised for monitoring acute changes in NMF in youth soccer players in-season and can be considered an appropriate alternative to the drop jump (DJ) test as it overcame issues in DJ fall height variability identified in previous research, where acceptable reliability was demonstrated in CMJ portion bodyweight and all outcome metrics. https://journal.iusca.org/index.php/Journal/article/view/418Sports ScienceStrength and ConditioningFour Corner ModelPhysical CornerProfiling |
| spellingShingle | Andrew Badby Paul Comfort Nicholas Ripley Matthew Cuthbert Francisco Robles-Palazón Peter Mundy John McMahon Which Metrics Can I Monitor? Test-Retest Reliability of Countermovement Jump and Countermovement Rebound Jump Force-Time Metrics in Youth Soccer Players In-Season International Journal of Strength and Conditioning Sports Science Strength and Conditioning Four Corner Model Physical Corner Profiling |
| title | Which Metrics Can I Monitor? Test-Retest Reliability of Countermovement Jump and Countermovement Rebound Jump Force-Time Metrics in Youth Soccer Players In-Season |
| title_full | Which Metrics Can I Monitor? Test-Retest Reliability of Countermovement Jump and Countermovement Rebound Jump Force-Time Metrics in Youth Soccer Players In-Season |
| title_fullStr | Which Metrics Can I Monitor? Test-Retest Reliability of Countermovement Jump and Countermovement Rebound Jump Force-Time Metrics in Youth Soccer Players In-Season |
| title_full_unstemmed | Which Metrics Can I Monitor? Test-Retest Reliability of Countermovement Jump and Countermovement Rebound Jump Force-Time Metrics in Youth Soccer Players In-Season |
| title_short | Which Metrics Can I Monitor? Test-Retest Reliability of Countermovement Jump and Countermovement Rebound Jump Force-Time Metrics in Youth Soccer Players In-Season |
| title_sort | which metrics can i monitor test retest reliability of countermovement jump and countermovement rebound jump force time metrics in youth soccer players in season |
| topic | Sports Science Strength and Conditioning Four Corner Model Physical Corner Profiling |
| url | https://journal.iusca.org/index.php/Journal/article/view/418 |
| work_keys_str_mv | AT andrewbadby whichmetricscanimonitortestretestreliabilityofcountermovementjumpandcountermovementreboundjumpforcetimemetricsinyouthsoccerplayersinseason AT paulcomfort whichmetricscanimonitortestretestreliabilityofcountermovementjumpandcountermovementreboundjumpforcetimemetricsinyouthsoccerplayersinseason AT nicholasripley whichmetricscanimonitortestretestreliabilityofcountermovementjumpandcountermovementreboundjumpforcetimemetricsinyouthsoccerplayersinseason AT matthewcuthbert whichmetricscanimonitortestretestreliabilityofcountermovementjumpandcountermovementreboundjumpforcetimemetricsinyouthsoccerplayersinseason AT franciscoroblespalazon whichmetricscanimonitortestretestreliabilityofcountermovementjumpandcountermovementreboundjumpforcetimemetricsinyouthsoccerplayersinseason AT petermundy whichmetricscanimonitortestretestreliabilityofcountermovementjumpandcountermovementreboundjumpforcetimemetricsinyouthsoccerplayersinseason AT johnmcmahon whichmetricscanimonitortestretestreliabilityofcountermovementjumpandcountermovementreboundjumpforcetimemetricsinyouthsoccerplayersinseason |