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    The relationship between differential and session ratings of perceived exertion with heart-rate derived measures of internal load in contemporary dance : an observational study

    Smith, Matthew W.

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    Date
    2018
    Citation:
    Smith, M. W. (2018). The relationship between differential and session ratings of perceived exertion with heart-rate derived measures of internal load in contemporary dance : an observational study. An unpublished thesis submitted in partial fulfilment of the requirements for the degree of Master of Osteopathy, Unitec Institute of Technology, Auckland, New Zealand.
    Permanent link to Research Bank record:
    https://hdl.handle.net/10652/4395
    Abstract
    BACKGROUND: The injury burden in dance is substantial and overuse injuries predominate. Training load is an important variable in understanding overuse injury aetiology and in the formulation of injury prevention strategies. AIM: To investigate the application of differential (dRPE) and session ratings of perceived exertion (sRPE) in contemporary dance and to explore their relationship with objective measures of internal training load derived from heart rate in contemporary dancers. DESIGN: Cross sectional observational design using field-based data collection. METHODS: Using the centiMax ratings of perceived exertion, a convenience sample of 31 dancers were recruited from three companies (26 females, 5 males; [mean±SD] age = 21±2.6 yr, mean body weight 65.1±10.5 kg; total duration weekly dancing 28.3±7.9 h, mean session duration 28.3±7.9 mins, total weekly duration 28.3±7.9 h/week) and provided sRPE for dance classes and differential ratings for breathlessness (RPE-B), technical difficulty (RPE-T), arm exertion (RPE-A) and leg exertion (RPE-L) from 174 individual sessions. These RPE values were multiplied by session duration to calculate session training load, (sRPE-TL) and differential load values, (dRPE-T, dPRE-B, dRPE-A, and dRPE-L). Bannister’s and Edwards’ training impulse (TRIMP) were calculated from heart-rate recordings for all sessions. Data were analysed using magnitude based inferences. RESULTS: Within-individual correlations between Bannister’s or Edwards’ TRIMP and differentials were respectively: sRPE-TL (r=0.38, r=0.41), dRPE-B (r=0.47, r=0.49), dRPE-A (r=0.39, r=0.41), dRPE-T (r=0.22, r=0.29) and dRPE-L (r=0.29, r=0.27). The strongest correlations were between dRPE-B and Bannister’s or Edwards’ TRIMP. Multiple linear regression revealed that a substantial proportion of variance (78%) in sRPE can be explained by RPE-L and RPE-B. CONCLUSIONS: This study provides further evidence that dRPE represent different sensory input and different dimensions of effort such as those that arise centrally (RPE-B), those that arise peripherally (RPE-L, RPE-A) and those that are cognitive (RPE-T). The current findings demonstrate that dRPE-B is more indicative of the cardiovascular load pathway than sRPE-TL in contemporary dancers. For applied practitioners, dRPE-B provides a simple means to quantify and monitor cardiovascular load in dancers for use in their training management and in future injury prevention studies.
    Keywords:
    New Zealand, dancers, dance injuries, contemporary dance, internal training load, monitoring training, training impulse, physical exertion, overuse injuries
    ANZSRC Field of Research:
    110499 Complementary and Alternative Medicine not elsewhere classified
    Degree:
    Master of Osteopathy
    Supervisors:
    Moran, Robert; Bacon, Catherine
    Rights:
    This digital work is protected by copyright. It may be consulted by you, provided you comply with the provisions of the Act and the following conditions of use: Any use you make of these documents or images must be for research or private study purposes only, and you may not make them available to any other person. You will recognise the author's and publishers rights and give due acknowledgement where appropriate.
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