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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. The Journal of Gdansk University of Physical Education and Sport

2014

tom 06

nr 3

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 VO2 max 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.

Cardiopulmonary effects of acepromazine-ketamine administration in the sheep

100%

Baniadam A., Afshar F. S., Balani M. R. B.

Bulletin of the Veterinary Institute in Puławy

2007

tom 51

nr 1

The effects of acepromazine-ketamine on the heart rate, arterial blood pressure, respiratory rate, blood gases, arterial blood pH, and temperature were investigated in six healthy sheep. Ketamine (11 mg/kg i.v.) was given 15 min after administration of acepromazine (0.05 mg/kg i.m.) A catheter was placed in the carotid artery for arterial blood sampling and recording of mean arterial blood pressure. All parameters were evaluated before the administration of acepromazine and at 5, 15, 30, 45, and 60 min following the injection of ketamine. The arterial blood pressure was recorded in 30 s after the injection of ketamine as well. The heart rate decreased significantly at minutes 15, 30, 45, and 60. The mean arterial blood pressure declined significantly at 30 s and 45 min. The mean respiratory rate decreased significantly at 45 and 60 min. PaO₂ decreased significantly at 5, 15, and 45 min, and PaCO₂ increased at 5 min. The pH values decreased significantly at 5, 15, and 30 min. The body temperature decreased significantly at all points in time. The data showed that the combination of acepromazine-ketamine caused an inhibition of the cardiovascular system. This combination is responsible for little distributed ventilation, decreased PaO₂, increased PaCO₂, decreased pH values, and a declined in body temperature in the anaesthesia period in sheep.

Ograniczanie wyników

1 Baltic Journal of Health and Physical Activity. The Journal of Gdansk University of Physical Education and Sport

1 Bulletin of the Veterinary Institute in Puławy

1 Afshar F. S.

1 Balani M. R. B.

1 Baniadam A.

1 Diachenko A.

1 Korol A.

1 Lusenko E.

1 Mishchenko V.

1 Tomiak T.

1 2014

1 2007

Wyniki wyszukiwania

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

Cardiopulmonary effects of acepromazine-ketamine administration in the sheep