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This research aims to explore the relationship between external and internal training load measures in elite youth soccer players.

January 24, 2026Scientific ReportsOpen Access

On the relationship between external and internal load variables in elite youth soccer players

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This research aims to explore the relationship between external and internal training load measures in elite youth soccer players.
Measured external load using a local positioning system over 3 months.
Collected subjective data like RPE and sleep quality, along with biochemical measures.
Calculated single day workload, exponential 7-day workload, and acute: chronic workload ratio.
Analyzed correlations between various load measures and subjective/biochemical markers.
Positive correlations were found between subjective measures and external load (RPE).
Negative relationships were observed between total distance and energy drive.
LDH showed positive correlation across all training load calculations.
CK correlated positively with acute: chronic workload ratio.
CMJ mean force demonstrated negative correlation with training load variables.

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Study investigates training load correlations in elite youth soccer players, suggesting effective monitoring through questionnaires.

Haller et al. (2026) studied this question.

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