ArticleFrontiers in sports and active living2026
Uncovering intensity trajectory patterns and their association with blood pressure adaptation following school-based high-intensity interval exercise in adolescents: Wroclaw PEER-HEART study.
Article in Frontiers in sports and active living, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Introduction: This study examined intensity patterns during school-based high-intensity interventions and their association with blood pressure (BP) adaptation in adolescents. Methods: A total of 145 students aged 16 (69 boys) participated in either traditional HIIT or a plyometric variant (HIPT) over eight weeks (16 sessions). Exercise intensity was calculated using the heart rate reserve method. Outcomes of interest were systolic and diastolic blood pressure (SBP, DBP, respectively). Blood pressure responders (Rs) and non-responders (NRs) were identified using a Bayesian approach. Results: Latent class mixed models revealed three distinct intensity trajectories: Class 1 (low-intensity declining trajectory), Class 2 (moderate-intensity declining trajectory), and Class 3 (high-intensity U-shaped trajectory). Although no significant unadjusted association was found between responder status and trajectory class, logistic regression indicated that individuals in Class 2 had higher odds of being classified as SBP responders (OR = 3.86, Discussion: These findings indicate that adolescents may follow different patterns of exercise intensity across a school-based intervention and that these patterns may be associated with blood pressure adaptation. Monitoring session-by-session exercise intensity may therefore provide information beyond the average intensity of the entire program. However, further studies are required before trajectory-based monitoring can be translated into specific recommendations for school practice.
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