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Table 2 Kinetic and kinematic variables of young and elderly subjects in terms of speed conditions

From: Differences of muscle co-contraction of the ankle joint between young and elderly adults during dynamic postural control at different speeds

  Preferred speed Fast speed
Young Elderly Young Elderly
COPy excursion [%BH] 6.06 ± 1.01 5.63 ± 1.82 6.67 ± 0.84 5.89 ± 1.65
5.50–6.62 4.67–6.60 6.21–7.14 5.01–6.76
COMy excursion [%BH] 5.64 ± 1.05 5.11 ± 1.75 4.99 ± 0.98 4.53 ± 1.61
5.06–6.22 4.18–6.03 4.45–5.53 3.68–5.38
COP-Vy mean [mm/s] 2.30 ± 0.97 1.60 ± 0.63 5.18 ± 1.07 4.14 ± 1.37*†
1.77–2.84 1.26–1.94 4.59–5.77 3.42–4.86
COP-Vy max [mm/s] 10.23 (7.94–11.80) 10.97 (9.17–13.01) 21.18 (18.41–23.45) 18.26 (14.17–19.94)
COM-Vy mean [mm/s] 2.09 ± 0.80 1.44 ± 0.54* 3.66 ± 0.47 3.06 ± 0.97
1.65–2.53 1.17–1.73 3.40–3.91 2.55–3.58
COM-Vy max [mm/s] 4.86 ± 1.42 4.22 ± 1.32 7.39 ± 1.35 6.04 ± 1.58*†
4.08–5.64 3.52–4.91 6.65–8.14 5.20–6.88
  1. Upper low: data are presented as mean ± standard deviation or median (interquartile range)
  2. Lower low: 95% confidence interval
  3. COP center of pressure, COM center of mass
  4. *Significant differences between the young and elderly groups in each condition (p < 0.025)
  5. Significant differences between two conditions in each group (p < 0.025)