What question did this study set out to answer?

This study examines how physiological factors contribute to performance proxies in endurance athletes.

May 6, 2026

35 Years of Joyner's Endurance Performance Model: Assessing the Contribution of Physiological Determinants of Performance Proxies in 888 Individuals from Recreational to World Class.

Key Points

This study examines how physiological factors contribute to performance proxies in endurance athletes.
Analyzed a cohort of 888 individuals ranging from recreational to world-class athletes.
Measured speed or power at lactate threshold and lactate turnpoint.
Utilized single and multiple linear regression models for data analysis.
Identified key physiological determinants contributing to performance predictions.
Lactate threshold speed was approximately 12.0 km/h and LTP speed was about 13.9 km/h.
Found variable contributions to performance across different athlete levels.

Abstract

BACKGROUND: ) and exercise economy. These variables are used to estimate speed or power at lactate threshold (LT) and lactate turnpoint (LTP), which serve as performance proxies. OBJECTIVE: This study examined the relationships between these variables in a large cohort of runners and cyclists and quantified their relative contributions to performance prediction. METHODS: (R: 88%; C: 84%), and speed or power at LT (R: 12.0 km/h; C: 190 W) and LTP (R: 13.9 km/h; C: 240 W). Single and multiple linear regression models were used to examine the relationship and relative contribution of physiological determinants to performance proxies. RESULTS: (4-11%). CONCLUSIONS: is limited in populations with heterogeneous characteristics.

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