Paper Title
Heart Rate Monitors For Monitoring Endurance Stress In Recreational Runners

Abstract
Endurance training is quite popular in research and outfield due to its greater impact on body composition, skeletal muscle adaptation, cardiac output, improved aerobic and anaerobic fitness and overall wellbeing. Adversely, running for prolonged duration can easily subject runners to overstress and limits the benefits of training. This study aimed to use the existing heart rate monitors to propose a non-interruptive physiological parameter which could help in regulating running stress for achieving optimal training benefits. For the study, total 17 male recreational runners (age 22.94±1.48 years, BMI 22.16±1.92, HRmax 190.47±7.89 beats/min) were recruited. Data for heart rate (HR), overall perceived exertion (RPEO) and blood lactate concentration (BLa) were monitored during two endurance trainings protocols (non-continuous and continuous). Results reported a strong Kendall’s tau-b correlation of BLa with %HRmax (τb = .581, p = .0001) and RPEO (τb = .583, p = .0001) during the non-continuous test. Study also reported a significant strong correlation of RPEO with %HRmax during the non-continuous test (τb = .591, p = .0001) and continuous test (τb = .654, p = .0001). One-Way RM ANOVA reported a significant effect of endurance fatigue on %HRmax, RPEO and BLa. The reported correlation between BLa, RPEO and %HRmax suggest that %HRmax can be used in existing HRMs for predicting physiological stress and running intensity during training boots of exercise to avoid overstress and to obtain optimal training benefits. Keywords - Running stress, Non-interruptive training, Heart rate monitors, Wearable Technology.