Monitoring training load in youth soccer players: effects of a six-week preparatory training program and the association between external and internal loads

Autoren

Sandra Lechner
Achraf Ammar
Omar Boukhris
Khaled Trabelsi
Jordan M Glenn
Jesper Schwarz
Omar Hammouda
Piotr Zmijewski
Hamdi Chtourou
Tarak Driss
Anita Hoekelmann

DOI

10.5114/biolsport.2023.112094

ISSN

0860-021X

Ausgabe der Veröffentlichung

1

Zeitschrift

Biology of Sport

Paginierung

63 - 75

Datum der Veröffentlichung

2023

Status

Published

Herausgeber

Termedia Sp. z.o.o.

Herausgeber URL

http://dx.doi.org/10.5114/biolsport.2023.112094

Datum der Datenerfassung

2023

Titel

Monitoring training load in youth soccer players: effects of a six-week preparatory training program and the associations between external and internal loads

Ausgabe der Zeitschrift

40

Datenquelle: Crossref

Abstract

This study examined the effects of a six-week preparatory training program on physical performance and physiological adaptations in junior soccer players. Additionally, we investigated whether a relationship existed between external and internal loads. Youth soccer players (aged 16 years old) from a youth football academy participated in six weeks of pre-conditioning training. Wireless Polar Team Pro and Polar heart rate sensors (H10) were used to monitor physical performance indicators (sprint and acceleration scores, covered distance, maximum and average speed and duration), physiological responses (maximum and average heart rate [HR] and R-R interval, time in HR zones 4+5, and heart rate variability [HRV]), and training load score. Additionally, muscle status and rating of perceived exertion (RPE) scores were measured using digital questionnaires. Significant increases were observed in the majority of physical performance indicators [i.e., sprints (p = 0.015, ES = 1.02), acceleration (p = 0.014, ES = 1), total distance (p = 0.02, ES = 0.87), as well as maximum speed (p = 0.02, ES = 0.87)]. A trend towards improvement was observed in the remaining performance indicators (i.e., distance/min and avg speed; ES = 0.6), training load (ES = 0.2), muscle status (ES = 0.3)), and all physiological responses parameters (ES = 0.1 to 0.6). Significant correlations were found between the majority of external load parameters (i.e., performance indicators) and objective (i.e., physiological responses) and subjective (i.e., RPE, muscle status) internal load parameters (p < 0.001). The highest number of moderate-large correlations were registered between performance indicators and time in HR zone 4+5 (0.58 < r < 0.82), training load (0.53 < r < 0.83), average HR (0.50 < r < 0.87), maximal HR (0.51 < r < 0.54) and average R-R interval (0.58 < r < 0.76). HR zone 4+5, average and maximal HR, average R-R interval, and training load score may help control training parameters and reduce the risk of under- or over-training in youth soccer players. However, these conclusions should be confirmed and replicated in future studies with more diverse subject populations.

Addresses

Institute of Sport Science, Otto-von-Guericke University, 39106, Magdeburg, Germany.

Autoren

Sandra Lechner
Achraf Ammar
Omar Boukhris
Khaled Trabelsi
Jordan M Glenn
Jesper Schwarz
Omar Hammouda
Piotr Zmijewski
Hamdi Chtourou
Tarak Driss
Anita Hoekelmann

DOI

10.5114/biolsport.2023.112094

eISSN

2083-1862

Externe Identifier

PubMed Identifier: 36636199
PubMed Central ID: PMC9806748

Open access

true

ISSN

0860-021X

Ausgabe der Veröffentlichung

1

Zeitschrift

Biology of sport

Sprache

eng

Medium

Print-Electronic

Online publication date

2022

Open access status

Open Access

Paginierung

63 - 75

Datum der Veröffentlichung

2023

Status

Published

Publisher licence

CC BY-SA

Datum der Datenerfassung

2023

Titel

Monitoring training load in youth soccer players: effects of a six-week preparatory training program and the association between external and internal loads.

Sub types

research-article
Journal Article

Ausgabe der Zeitschrift

40

Files

https://europepmc.org/articles/PMC9806748?pdf=render

Datenquelle: Europe PubMed Central

Abstract

This study examined the effects of a six-week preparatory training program on physical performance and physiological adaptations in junior soccer players. Additionally, we investigated whether a relationship existed between external and internal loads. Youth soccer players (aged 16 years old) from a youth football academy participated in six weeks of pre-conditioning training. Wireless Polar Team Pro and Polar heart rate sensors (H10) were used to monitor physical performance indicators (sprint and acceleration scores, covered distance, maximum and average speed and duration), physiological responses (maximum and average heart rate [HR] and R-R interval, time in HR zones 4+5, and heart rate variability [HRV]), and training load score. Additionally, muscle status and rating of perceived exertion (RPE) scores were measured using digital questionnaires. Significant increases were observed in the majority of physical performance indicators [i.e., sprints (p = 0.015, ES = 1.02), acceleration (p = 0.014, ES = 1), total distance (p = 0.02, ES = 0.87), as well as maximum speed (p = 0.02, ES = 0.87)]. A trend towards improvement was observed in the remaining performance indicators (i.e., distance/min and avg speed; ES = 0.6), training load (ES = 0.2), muscle status (ES = 0.3)), and all physiological responses parameters (ES = 0.1 to 0.6). Significant correlations were found between the majority of external load parameters (i.e., performance indicators) and objective (i.e., physiological responses) and subjective (i.e., RPE, muscle status) internal load parameters (p < 0.001). The highest number of moderate-large correlations were registered between performance indicators and time in HR zone 4+5 (0.58 < r < 0.82), training load (0.53 < r < 0.83), average HR (0.50 < r < 0.87), maximal HR (0.51 < r < 0.54) and average R-R interval (0.58 < r < 0.76). HR zone 4+5, average and maximal HR, average R-R interval, and training load score may help control training parameters and reduce the risk of under- or over-training in youth soccer players. However, these conclusions should be confirmed and replicated in future studies with more diverse subject populations.

Date of acceptance

2021

Autoren

Sandra Lechner
Achraf Ammar
Omar Boukhris
Khaled Trabelsi
Jordan M Glenn
Jesper Schwarz
Omar Hammouda
Piotr Zmijewski
Hamdi Chtourou
Tarak Driss
Anita Hoekelmann

Autoren-URL

https://www.ncbi.nlm.nih.gov/pubmed/36636199

DOI

10.5114/biolsport.2023.112094

Externe Identifier

PubMed Central ID: PMC9806748

ISSN

0860-021X

Ausgabe der Veröffentlichung

1

Zeitschrift

Biol Sport

Schlüsselwörter

External parameters
Internal parameters
Training monitoring
Youth football

Sprache

eng

Country

Poland

Paginierung

63 - 75

PII

112094

Datum der Veröffentlichung

2023

Status

Published

Titel

Monitoring training load in youth soccer players: effects of a six-week preparatory training program and the association between external and internal loads.

Sub types

Journal Article

Ausgabe der Zeitschrift

40

Datenquelle: PubMed

Monitoring training load in youth soccer players: effects of a six-week preparatory training program and the association between external and internal loads

Files

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