Key result
Altered stance and lower-limb injuries linked to distinct compensatory changes in long-range balance control scaling.
Why the study?
Human balance control involves complex temporal processes that may be disrupted by injury or increased task difficulty, requiring sensitive assessment methods.
Do altered stance and lower-limb injury change the temporal dynamics of postural control as measured by DFA and WTS?
Cross-Sectional (n=93)
Do altered stance and lower-limb injury change the temporal dynamics of postural control as measured by DFA and WTS?
Time series techniques like DFA and WTS can detect subtle impairments in postural control due to injury or increased task difficulty.
Supports DFA/WTS for subtle postural impairment detection; hypothesis-generating and should not yet change practice.
Introduction: Human balance control is regulated by complex temporal processes that may be disrupted by injury or increased task difficulty. Methods: We examined long-range temporal characteristics of force platform recordings during quiet standing in 76 physically active participants with or without lower-limb injury, and in 13 non-injured participants standing with eyes closed or on one leg. Detrended fluctuation analysis (DFA) and wavelet transform spectral analysis (WTS) were used to quantify the temporal dynamics of postural control. Results: All recordings showed long-range autocorrelated behavior, with a visible crossover point separating random fluctuations at small time scales from structured dynamics at higher time scales (100 ms to 1 s). Changes in scaling behavior occurred only above the crossover point in response to altered stance or injury. Specifically, standing on one leg increased DFA and WTS slopes, likely due to enhanced amplitudes of characteristic peaks at approximately 250 ms and 650 ms. Two distinct postural responses to injury emerged: (1) compensation - characterized by increased amplitudes of all high-scale WTS modes and a crossover shift to smaller scales; and (2) underachievement - marked by decreased amplitudes and a shift of the crossover to larger time scales. Discussion: These findings support the potential of DFA, WTS, and similar time series techniques as sensitive tools for assessing subtle impairments in postural control.
No takes yet. Share an insight, caveat, or question.
Radić et al. (2025) conducted a cross-sectional in Lower-limb injury and postural balance (n=93). Lower-limb injury and altered stance (eyes closed, one leg) vs. Non-injured quiet standing with eyes open was evaluated on Changes in scaling behavior (DFA and WTS slopes) above the crossover point (100 ms to 1 s). Altered stance and lower-limb injuries changed the long-range temporal scaling behavior of balance control above the 100 ms crossover point, with injuries causing distinct compensatory or underachievement patterns.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: