• Changes in Energy Demand of Dance Activity and Cardiorespiratory Fitness During One Year of Vocational Contemporary Dance Training

      Beck, Sarah; Wyon, Matthew A; Redding, Emma (Wolters Kluwer, 2017-11)
      Previous literature has demonstrated that the intensity of dance class, as well as its discontinuous nature, is not sufficient to elicit an aerobic training response and that the aerobic capacity of dancers is relatively low. These findings have raised questions of the suitability of training, through class and rehearsal, as adequate preparation for the physical demands of performance and a sustained, successful career in dance. The aim of this study was to describe changes in aerobic fitness and energy cost of dance movement occurring throughout one year of training. Subjects were thirteen female dance students; seven first year undergraduate students (UG), and six postgraduate students (PG). At three time-points (TP1, TP2, TP3) during one academic year each subject completed a treadmill test, to determine VO2peak (ml.kg-1.min-1) and lactate threshold (LT) (ml.kg-1.min-1 and %VO2peak), and a standardised four-minute dance sequence, where mean demand was expressed as VO2 (ml.kg-1.min-1), heart rate (b.min-1), %VO2peak, and %LT. Both groups displayed an overall decrease in mean VO2peak throughout the year, despite a peak in fitness at TP2 in the PG students. No significant changes in LT were noted over time for either group. A significant reduction in the relative intensity of the dance sequence, particularly in relation to mean VO2 (ml.kg-1.min-1) and %LT data, was observed over time in both groups although the degree of change was less in the UG group than the PG group. Apparent adaptations during a rehearsal period in the PG group are presented in contrast to previous research findings. Recommendations for future research include further investigation into the energy demand of rehearsal and cardiorespiratory adaptation during rehearsal periods as well as further reporting of measures related to LT and movement economy.
    • Long-term quality of life postacute kidney injury in cardiac surgery patients.

      Mishra, Pankaj Kumar; Luckraz, Heyman; Nandi, Jayanta; Nevill, Alan M.; Giri, Ramesh; Panayiotou, Andrew; Nicholas, Johann (Wolters Kluwer, 2018-01-11)
      Acute renal failure after cardiac surgery is known to be associated with significant short-term morbidity and mortality. There have as yet been no major reports on long-term quality of life (QOL). This study assessed the impact of acute kidney injury (AKI) and renal replacement therapy (RRT) on long-term survival and QOL after cardiac surgery. The need for long-term RRT is also assessed.