Intra- and inter-session reliability of vertical jump performance in healthy middle-aged and older men and women |
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Authors: | Massimiliano Ditroilo Roberta Forte David McKeown Colin Boreham Giuseppe De Vito |
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Institution: | 1. School of Public Health, Physiotherapy and Population Science , University College Dublin , Dublin, Ireland;2. TRIL (Technology Research for Independent Living) Centre , University College Dublin , Dublin, Ireland;3. Institute for Sport and Health , University College Dublin , Dublin, Ireland massimiliano.ditroilo@ucdconnect.it;5. Institute for Sport and Health , University College Dublin , Dublin, Ireland;6. Dipartimento del Movimento Umano e dello Sport , Università degli Studi di Roma “Foro Italico” , Italy;7. TRIL (Technology Research for Independent Living) Centre , University College Dublin , Dublin, Ireland;8. Institute for Sport and Health , University College Dublin , Dublin, Ireland;9. Institute for Sport and Health , University College Dublin , Dublin, Ireland |
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Abstract: | Abstract Despite its widespread use in performance assessment, the reliability of vertical jump in an ageing population has not been addressed properly. The aim of the present study was to assess intra- and inter-day reliability of countermovement jump in healthy middle-aged (55–65 years) and older (66–75 years) men and women. Eighty-two participants were recruited and asked to perform countermovement jumps on two different occasions interspersed by 4 weeks. The middle-aged groups exhibited excellent absolute reliability for flight height, jump height, peak force, peak power, peak force/body mass, and peak power/body mass, with coefficients of variation ranging from 2.9% to 7.2% in men and from 3.6% to 6.9% in women and moderate-to-high intraclass correlations (0.75 to 0.97 in men; 0.77 to 0.95 in women). The older groups displayed good coefficients of variation (4.2% to 10.8% in men and 3.4% to 9.5% in women), but the intraclass correlations were low-to-high (0.43 to 0.84 in men; 0.42 to 0.93 in women). Overall, intra-session reliability was higher than inter-session reliability. Peak power was by far the most consistent variable, whereas flight and jump height had the most marked variability. The minimum detectable change varied from 10.5% to 33%, depending on the variable examined, suggesting important implications for intervention studies. |
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Keywords: | Countermovement jump ageing peak power minimum detectable change |
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