The present study aimed to investigate the changes in the heart rate and blood lactate response of field hockey athletes during endurance speed training. A cohort of thirty athletes (mean age 16.70±2.17 years) spanning various playing positions constituted the sample for this investigation. To evaluate the physical fitness level, Yo-Yo Intermittent Recovery Test Level 1 (Yo-Yo IR1) was used, whereas heart rate, blood lactate concentration, and VO2 max were used to measure the physiological parameters of the athletes. Results found that subjects’ mean age, weight, and height were 16.70 ± 02.17 years, 51.82 ± 05.23 kg, and 162.17 ± 06.10 cm, respectively. No positional difference was evident in any of the variables (BMI, fat%, and Vo2max) among the subjects. Subjects’ mean HR immediate after activity was recorded 163.46 ± 17.14 bpm. Mean blood lactate level during rest, immediate after activity, after 5 min, and 10 min of recovery were 02.45 ± 00.91 mmol L−1, 08.63 ± 05.82 mmol L−1, 07.05 ± 04.56 mmol L−1, and 05.70 ± 04.08 mmol L−1, respectively. Interestingly, the study uncovered position-specific lactate responses. Goalkeepers exhibited the highest lactate accumulation and fastest recovery rate, while fullback players showed the lowest lactate buildup and slowest recovery. This finding suggests that tailored, position-specific training protocols may be beneficial for optimizing individual and team performance. In conclusion, this research underscores the significant relationships between physiological parameters and highlights the interconnected nature of these variables during high-intensity exercise.