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Effect of moderate and high intensity training sessions on cardiopulmonary chemosensitivity and time-based characteristics of response in high performance rowers

100%

Tomiak T., Mishchenko V., Lusenko E., Diachenko A., Korol A.

Baltic Journal of Health and Physical Activity

2014

vol. 6

issue 3

211-221

Background: The present study was performed to clarify fatigue-induced effects of a strenuous and moderate intensity endurance training session on temporary changes of cardiopulmonary (CP) chemosensitivity and fast kinetics response. Material/Methods: Eleven high performance (national level) male rowers participated in this study [age 21.8 ±1.7 (range 18-25 years), 89.3 ±2.0 kg, 190.1 ±1.7 cm, VO2 max 67.9 ±1.1 ml·kg-1·min-1]. The studies involved three steps: 1) a study of effects related to a training session of moderate intensity, 2) effects of a high intensity session, and 3) an impact of a high intensity session on values of peak response. The high intensity session consisted of intermittent training loads made up of five sets of four repetitions of sixty-second work intervals (HR of 149-186 bt·min-1). The moderate intensity session consisted of unvarying type of exercise (HR of 138-167 bt·min-1). Measurements were made at rest before, 13-15, and 37-39 hours after the training session. In rebreathing tests ventilatory sensitivity to CO2 and HR response sensitivity to normocapnic hypoxia were measured. Fast kinetics of ventilation, oxygen uptake, CO2 production and the heart rate were measured in a 5-min standard power test (0.7 VO2 max, 5 min, transition from 25 w) and in a 6-min test (1.12 ±0.11 VO2max). Results: We found that a training session of high intensity resulted in a significant decrease in sensitivity to hypercapnia, an increase in CP sensitivity to hypoxia, a decrease in CP fast kinetics and stability of peak response 13-15 hours after the session vs. baseline. Mean power in a 6-min maximum test decreased, which was mainly determined by a decrease in mean power during the first 3 min and utilization of VO2max for a 6-min test. Moderate intensity of a training session resulted in an increase in ventilatory sensitivity to hypercapnia whereas sensitivity CP to hypoxia and fast kinetics remained unaffected. Conclusions: These results suggest that not only CP chemosensitivity to hypoxia but also CP chemosensitivity to hypercapnia are variable in high intensity endurance training. The variability related to the effect of fatigue in the recovery phase (up to 15-15 hours) after strenuous training sessions.

Individualities of Cardiorespiratory Responsiveness to Shifts in Respiratory Homeostasis and Physical Exercise in Homogeneous Groups of High Performance Athletes

86%

Mishchenko V., Shynkaruk O., Suchanowski A., Lysenko O., Tomiak T., Diachenko A., Korol A.

Baltic Journal of Health and Physical Activity

2010

vol. 2

issue 1

13-29

Background: It is known that high sports performances are based upon optimization of adaptation process. In order to achieve the above, one should provide a maximal account of individual vivid features of athlete's abilities, peculiarities of his/her physiological reactivity. The aim was to study individualities of sensitivity to shifts in respiratory homeostasis and responsiveness to high intensity physical exercises in homogeneous groups of high performance endurance athletes.Material/Methods: Individual peculiarities of the cardiorespiratory system (CRS) physiological reactivity were evaluated in 118 high performance endurance athletes (cyclists, runners and rowers) aged 20-27 years (competing regularly in sports for 6.8 ± 1.1 years). The sensitivity of response to CO2-H+ (rebreathing), fast kinetics and the peak response of CRS to various physical loads were measured. The level of VO2max and accumulated oxygen deficit were determined as well.Results: The results indicate distinctive individual peculiarities of CRS response to the shifts of respiratory homeostasis in homogeneous groups of endurance athletes with respect to sensitivity and stability of responses to CO2-H+. Sensitivity to CO2-H+ demonstrated a positive correlation with fast kinetics and peak levels in responses to physical loads and anaerobic potential realization.Conclusions: Hyperkinetic and hypokinetic types of an individual physiological responsiveness of CRS to shifts in the respiratory homeostasis and physical exercise in homogeneous groups of high performance athletes were revealed as a premise for athletes' high specific work capacity.

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2 Baltic Journal of Health and Physical Activity

1 2014

1 2010

2 Diachenko A.

2 Korol A.

2 Mishchenko V.

2 Tomiak T.

1 Lusenko E.

1 Lysenko O.

1 Shynkaruk O.

1 Suchanowski A.

Search results

Effect of moderate and high intensity training sessions on cardiopulmonary chemosensitivity and time-based characteristics of response in high performance rowers

Individualities of Cardiorespiratory Responsiveness to Shifts in Respiratory Homeostasis and Physical Exercise in Homogeneous Groups of High Performance Athletes