Kalinski, M. I., Mishchenko, V. S., & Tomiak, T. (2004). Influence of strenuous training on cardiorespiratory response sensitivity and primary kinetics in elite rowers. Medicine and Science in Sports and Exercise, 36(5), Supplement abstract 1799.

This study was conducted to determine the effect of strenuous training workloads on the sensitivity of the cardiorespiratory system in response to carbon dioxide, hypoxia, and changes in primary cardiorespiratory system kinetics in elite (Polish National Team) rowers (N = 12). Ss were examined in the morning before strenuous training and the following day after strenuous training sessions (two daily sessions of intermittent types of workload characteristic for this group of elite athletes). VO2, normocapnic hypoxia, and cardiorespiratory system sensitivity in rebreathing tests (standard rest) were measured as well as VE, VO2, and HR kinetics (monoexponential function) at 70% VO2max.

During the recovery period (12-14 hours) after vigorous intermittent types of training, cardiorespiratory system sensitivity to VO2 and primary kinetics in elite rowers were decreased compared to a full recovery (24 hours). This might represent a specific integral feature of fatigue caused by intermittent training sessions. Such fatigue might limit the responsiveness of cardiorespiratory system to the following exercise training session and possibly have modifying effects on training as well.

Implication. A strenuous training session impacts negatively on a second training session in the same day.

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