This study aims to compare the effects of three different training intensity distribution (TID) models-polarized, threshold, and pyramidal-on physiological and performance adaptations in recreational distance runners. Twenty-four participants will be assigned to one of the three training interventions and will complete an 8-week structured running program based on the respective TID approach. The primary objective is to determine whether different TID models elicit distinct changes in key physiological markers and endurance performance. The study seeks to answer whether a specific intensity distribution strategy provides superior adaptations in recreational runners when training is prescribed over a controlled intervention period.
Age range
18 Years – 60 Years
Sex
ALL
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A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
Maximal Oxygen Uptake (VO₂max)
Timeframe: Baseline to 8 weeks
Ventilatory Thresholds and Associated Running Speeds
Timeframe: Baseline to 8 weeks
Running Economy
Timeframe: Baseline to 8 weeks
Changes in 5-km time trial performance
Timeframe: Baseline to 8 weeks