Purpose The main aim of the present study was to compare the immediate recovery of RR values of HRV as well as HR subsequent and during 3000-m running in LA and HA in youth elite athletes. Methods Seventeen elite youth mid-distance athletes voluntarily participated in the study (mean ± SD; age 14.9 ± 1.3 years; height 164.1 ± 6.6 cm; weight 53.2 ± 8.6 kg). All athletes performed 2 different sessions (LA and HA) at the same time of day two weeks apart. The interventions were held in the racetrack regions of the Botanical Park (~155-m above sea level, 24°-26°) and Uludag Cobankaya (~1750-m, 16°-18°) in Bursa. Afterward, to determine the HR and the HRV of all athletes, a Polar H7 chest strap with a Polar V800 heart rate monitor was used. Results For HR values in LA, there was no significant correlation between the correlation of during 3000-m run and after 10-min recovery with time, respectively (r2 = .008, r2 = .096). In the HR values in HA, there was no significant correlation between the correlation of during 3000-m run and after 10-min recovery with time, respectively (r2 = .033, r2 = .008). There was no significant correlation between the correlation of during 3000-m run and after 10-min recovery with time, espectively in RR values in LA (r2 = .004, r2 = .087). In RR values in HA, there was no significant relationship between the correlation of during 3000-m run and after 10-min recovery with time, respectively (r2 = .024, r2 = .005). Conclusion For athletes, exercise training for oxygen levels at different altitudes may help to shorten the running time. Future studies should examine the cardiac autonomic long-term responses of elite runners in distance running at different altitudes about running time performance and try to examine and improve recovery processes.
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