Analysis of the effect of fatigue on walking gait stability

Arif, Muhammad; Ohtaki, Yasuaki; Nagatomi, Ryoichi; Ishihara, Tatsuya; Inooka, Hikaru

doi:10.1109/mhs.2002.1058043

Cited by 7 publications

(13 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…At least for land gait, the literature reports mixed findings on the effect of fatigue in the ApEn. Even though, a paper reported an increase in the ApEn from pre-to post-test after a protocol that elicited fatigue in walking (Arif et al, 2002); another noted non-significant variations in race-walkers (Preatoni et al, 2010). We found no changes in the inter-cyclic variations (i.e.…”

Section: Discussioncontrasting

confidence: 76%

“…Conversely, there are mixed findings on its effect in ApEn (Arif, Ohtaki, Nagatomi, Ishihara, & Inooka, 2002;Preatoni et al, 2010). In human gait on land, it was reported that the ApEn would increase by 12% to 30% between a pre-and post-test after being under a protocol that elicited fatigue (Arif et al, 2002). However, race-walkers performing a set of 40 × 20 m did not show any significant difference in the entropy between the first 20 and the last 20 trials (Preatoni et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…Over a 120-min load carriage March by servicemen, the FD decreased from 1.43 to 1.12 (Schiffman, Chelidze, Adams, Segala, & Hasselquist, 2009). Conversely, there are mixed findings on its effect in ApEn (Arif, Ohtaki, Nagatomi, Ishihara, & Inooka, 2002;Preatoni et al, 2010). In human gait on land, it was reported that the ApEn would increase by 12% to 30% between a pre-and post-test after being under a protocol that elicited fatigue (Arif et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The changes in classical and nonlinear parameters after a maximal bout to elicit fatigue in competitive swimming

Barbosa

Chen

Morais

et al. 2018

Human Movement Science

View full text Add to dashboard Cite

The aim was to assess the effect of fatigue on linear and nonlinear parameters in swimming. Twenty-four fitness-oriented swimmers performed a maximal bout of 100 m at front-crawl to elicit fatigue. Before (pre-) and immediately after (post-test) the bout, participants swam an all-out 25 m to derive the speed fluctuation (dv), approximate entropy (ApEn) and fractal dimension (FD) from the speed-time series collected by a speedo-meter. Swim speed was 10.85% slower in the post-test than in the pre-test (p < .001, η = 0.72). There was an effect of the fatigue on the dv with a moderate effect size. The dv increased shifting the 95CI band from 0.116-0.134 to 0.140-0.161. The ApEn showed non-significant variations between the pre- and post-test having the 95CI of pre- and post-test overlapped (pre: 0.659-0.700; post: 0.641-0.682). The FD showed as well a significant variation (the 95CI moved from 1.954-1.965 to 1.933-1.951). It can be concluded that in swimming there are changes in classical and nonlinear parameters under fatigue.

show abstract

Section: Discussioncontrasting

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The changes in classical and nonlinear parameters after a maximal bout to elicit fatigue in competitive swimming

Barbosa

Chen

Morais

et al. 2018

Human Movement Science

View full text Add to dashboard Cite

show abstract

“…While Bruijn's coverage is very inclusive, he deliberately excludes entropy measures owning to a lack of studies that adequately address their validity as a measure of the stability of human walking [3], There have been two prominent methodolo gies used in previous studies, which have applied entropy meas ures to human walking. One methodology is to calculate the entropy of linear accelerations measured approximately at the center of mass [9][10][11]. A number of other studies use entropy measures like a statistical tool to assess variations in spatial-temporal variables like stride interval [12][13][14] and mini mum toe clearance [15,16], Although these studies seem to sug gest that lower complexity may correlate with healthier walking, the methodologies used are not well established, and the strength of the findings are not highly convincing.…”

Section: Introductionmentioning

confidence: 99%

Using Entropy Measures to Characterize Human Locomotion

Leverick

Szturm

2014

Journal of Biomechanical Engineering

View full text Add to dashboard Cite

Entropy measures have been widely used to quantify the complexity of theoretical and experimental dynamical systems. In this paper, the value of using entropy measures to characterize human locomotion is demonstrated based on their construct validity, predictive validity in a simple model of human walking and convergent validity in an experimental study. Results show that four of the five considered entropy measures increase meaningfully with the increased probability of falling in a simple passive bipedal walker model. The same four entropy measures also experienced statistically significant increases in response to increasing age and gait impairment caused by cognitive interference in an experimental study. Of the considered entropy measures, the proposed quantized dynamical entropy (QDE) and quantization-based approximation of sample entropy (QASE) offered the best combination of sensitivity to changes in gait dynamics and computational efficiency. Based on these results, entropy appears to be a viable candidate for assessing the stability of human locomotion.

show abstract

“…gait). 38,39 Biosignals that had high probability for periodical behaviour were characterized by low differential entropy, whereas those following random behaviour showed high differential entropy. 40 Having shown that gait variability differs substantially between patients with untreated acute ACL deficiency, the purpose of the current study was to investigate whether improvements would be seen after surgery in ACL deficient patients by comparing gait patterns pre-and postoperatively and with the gait patterns for normal controls.…”

Section: Introductionmentioning

confidence: 99%

Pre-Operative versus Post-Operative Gait Variability in Patients with Acute Anterior Cruciate Ligament Deficiency

et al. 2011

View full text Add to dashboard Cite

Change in gait variability at least 6 months after surgical reconstruction of the anterior cruciate ligament (ACL) was assessed in 20 male patients with acute ACL deficiency and compared with preoperative data and that from 20 healthy male controls. Gait was measured using a triaxial accelerometer and data were analysed by the Gait Evaluation Differential Entropy Method (GEDEM) to determine gait variability. Pain was assessed with a visual analogue scale and functional ability with the Oswestry Disability Index and the International Knee Documentation Committee score.Mean gait variability was significantly lower after than before surgery, with values for the anterior-posterior axis being in the normal range of controls after 6 months, whereas in the mediolateral axis mean gait variability remained significantly higher, indicating that some rotational instability remained in the time-frame of the study. Pain and functional ability scores improved after surgery compared with before surgery. The combination of accelerometry and GEDEM may be a useful orthopaedic tool for the post-operative evaluation of patients who have undergone ACL reconstruction.

show abstract

Analysis of the effect of fatigue on walking gait stability

Cited by 7 publications

References 6 publications

The changes in classical and nonlinear parameters after a maximal bout to elicit fatigue in competitive swimming

The changes in classical and nonlinear parameters after a maximal bout to elicit fatigue in competitive swimming

Using Entropy Measures to Characterize Human Locomotion

Pre-Operative versus Post-Operative Gait Variability in Patients with Acute Anterior Cruciate Ligament Deficiency

Contact Info

Product

Resources

About