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Weekly Training Load Differences between Starting and Non-Starting Soccer Players.

Matej Varjan¹, Mikulas Hank¹, Maros Kalata¹

¹Sport Research Centre, Faculty of Physical Education and Sport, Charles University, Prague, Czech Republic.

Journal of Human Kinetics

|February 21, 2024

Summary

Soccer starters have higher weekly training loads in high-speed running, sprinting, and acceleration/deceleration compared to non-starters. This highlights a potential under-loading risk for non-starters, particularly in offensive positions, requiring coaches to address load discrepancies.

Keywords:

external load monitoring physical performance player development

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Area of Science:

Sports Science
Exercise Physiology
Soccer Performance Analysis

Background:

Understanding training load disparities between soccer players is crucial for optimizing performance and preventing under- or over-training.
Starters and non-starters may experience different training stimuli, potentially impacting physical development and match readiness.

Purpose of the Study:

To investigate differences in weekly training load between soccer starters and non-starters.
To analyze these differences based on playing position and training day.
To identify potential under-loading in non-starters.

Main Methods:

Monitored 31 young adult soccer players in the 3rd Czech division over a season.
Utilized GPS to measure weekly training load: total distance (TD), high-speed running (HSR), sprint running (SR), and acceleration/deceleration distance (ACDC).
Classified players as starters or non-starters based on match line-ups.

Main Results:

Starters exhibited significantly higher HSR, SR, and ACDC compared to non-starters (p < 0.05), with small to moderate effect sizes.
Differences were most pronounced in fullbacks, offensive midfielders, and forwards.
The largest load discrepancies occurred in training sessions immediately preceding a match day.

Conclusions:

Non-starters, especially in offensive roles, face lower weekly external loads, particularly in high-intensity activities.
This suggests a potential risk of under-loading for non-starters in the training process.
Coaches should implement strategies to balance training loads and ensure adequate high-intensity exposure for all players.