ArticleLife (Basel, Switzerland)2026
Intensity Trajectories During High-Intensity Interval Training and Their Impact on Health Outcomes in Adolescents: Evidence from School-Based PE Settings (Peer-Heart Studies).
Article in Life (Basel, Switzerland), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT06431230 (Dose-response Relationship and High-intensity Interval Training Effects During Physical Education Lesson on Health Markers in Adolescents), which is not on this map. Not yet cited in PubMed.
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Dose-response Relationship and High-intensity Interval Training Effects During Physical Education Lesson on Health Markers in Adolescents
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2 authors.
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Abstract
backgroundHigh-intensity interval training (HIIT) is increasingly implemented in school-based physical education, yet little is known about how exercise intensity changes across repeated sessions and whether such trajectories are associated with physiological adaptations in adolescents.
methodsThis study, conducted within the PEER-HEART project (ClinicalTrials.gov: NCT06431230), included 145 adolescents from the experimental arms of a broader school-based trial, stratified by sex and training modality: male HIPT (
resultsVisual analyses indicated sex- and modality-specific intensity patterns, with the female HIIT group showing the most dynamic trajectory. Mean changes ranged from -0.63 ± 2.37% to -1.54 ± 2.66% for body fat, from -2.73 ± 5.28 to -5.37 ± 4.32 mmHg for systolic blood pressure, from -0.22 ± 5.00 to -2.62 ± 6.25 mmHg for diastolic blood pressure, and from 0.41 ± 3.25 to 3.81 ± 4.67 mL/kg/min for predicted VO
conclusionsIndividual intensity trajectories may help explain variability in physiological responses to school-based interval training and may provide additional insight beyond group-level comparisons alone.
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