Cardiorespiratory synchronization under the influence of strength endurance training


  • Oleksandr Romanchuk Department of medical rehabilitation, Ukrainian Research Institute of Medical Rehabilitation and Resort Therapy of the Ministry of Health of Ukraine, Odesa, Ukraine
  • Oksana Guzii Department of physical culture rehabilitation and sports medicine, Ivan Bobersky Lviv State University of Physical Culture, Lviv, Ukraine
  • Anatoliy Mahliovanyi Department of physical education and sports medicine, Danylo Halytsky Lviv National Medical University, Lviv, Ukraine
  • Igor Smirnov Department of medical rehabilitation, Ukrainian Research Institute of Medical Rehabilitation and Resort Therapy of the Ministry of Health of Ukraine, Odesa, Ukraine



Strength endurance, cardiorespiratory synchronization, controlled respiration, Hildebrandt index, volumetric synchronization index


Purpose: to determine changes in the parameters of cardiorespiratory relationships during the maneuver with a change in breathing rate after a 4-month cycle of training aimed at the development of strength endurance.

Material & Methods: the results of the spiroarteriocardiorhythmographic study of 22 healthy men aged 20.7±2.3 years, who for 4 months 2 times a week for 90 minutes, were analyzed (a total of 30 classes were held) engaged in training for the development of strength endurance. The indicators of heart rate (min1), respiratory rate (min1), cardiac output (dm3×min1), minute lung ventilation (L×min1) and their derivatives – the Hildebrandt index (HR/RR) and volume synchronization index (CO/V), which were obtained during spontaneous respiration and controlled breathing at 0.1 Hz and 0.25 Hz.

Results: it was shown that strength endurance training led to a probable decrease in heart rate from 71.4 (63.9; 77.5) to 64.3 (60.8; 68.3), p=0.002, respiratory rate from 14.1 (12, 7; 16.8) to 13.8 (10.7; 15.3), p= 0.020 and minute lung ventilation from 8.19 (6.24; 8.86) to 6.40 (3.73; 7.74) ), p=0.004 during spontaneous breathing, as well as a significant increase in the volumetric synchronization index. (dm3×L1) during spontaneous respiration from 0.597 (0.490; 0.832) to 0.725 (0.564; 1.148), p=0.008, during controlled respiration at 0.1 Hz from 0.327 (0.382; 0.529) to 0.532 (0.441; 0.723), p=0.012 and during controlled respiration at 0.25 Hz from 0,245 (0,339; 0,455) to 0,481 (0,373; 0,616), р=0,003 against the background of a decrease in the Hildebrandt index during controlled respiration 0,1 Hz from 11.14 (10.43; 12.49) to 10.18 (9.54; 11.00), p=0.001, as well as with controlled respiration at 0.25 Hz from 5.33 (4.68; 5.85) to 4.46 (4.13; 4, 78), p=0.000.

Conclusions: endurance training for 4 months led to an economization of the cardiovascular and respiratory systems function and a decrease in the response to sympathoadrenal activation and hyperventilation.



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How to Cite

Oleksandr Romanchuk, Oksana Guzii, Anatoliy Mahliovanyi, & Igor Smirnov. (2024). Cardiorespiratory synchronization under the influence of strength endurance training. Physical Rehabilitation and Recreational Health Technologies, 9(1), 25–35.



Original research article