+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

The independent effect of added mass on the stability of the sagittal plane leg kinematics during steady-state human walking

, : The independent effect of added mass on the stability of the sagittal plane leg kinematics during steady-state human walking. Journal of Experimental Biology 212(Pt 12): 1965-1970

This study investigated the independent effect of added mass on the stability of the leg kinematics during human walking. We reasoned that adding mass would influence the body's inertial state and thus challenge the ability of the leg to redirect and accelerate the total mass of the body while walking. We hypothesized that walking with added mass would reduce the stability of the leg kinematics. Lower extremity sagittal plane joint kinematics were recorded for 23 subjects as they walked on a treadmill at their preferred speed with and without added mass. The total mass of each subject was manipulated with combinations of simulated reduced gravity and added load. The stability of the leg kinematics was evaluated by computing the eigenvalues of the Poincaré map (i.e. Floquet analysis) that defined the position and velocity of the right hip, knee and ankle at heel-contact and mid-swing. Significant differences in stability were found between the various added mass conditions (P=0.040) and instant in the gait cycle (P=0.001). Post-hoc analysis revealed that walking with 30% added mass compromised the stability of the leg kinematics compared with walking without additional mass (P=0.031). In addition, greater instability was detected at the instance of heel-contact compared with mid-swing (P=0.001). Our results reveal that walking with added mass gives rise to greater disturbances in the leg kinematics, and may be related to the redirection and acceleration of the body throughout the gait cycle. Walking with added mass reduces the stability of the leg kinematics and possibly the overall balance of the walking pattern.


PMID: 19483014

DOI: 10.1242/jeb.026153

Other references

Tebrugge, F., 1989: Interactions between soil management and the soil ecosystem. The concepts of a multidisciplinary research project are outlined. Soil management systems differing in intensity were applied on a variety of sites in Hesse (FRG). Although qualitative differences are clearly noticeable between the systems, these...

Lee, E.Yookyung.; Caffrey, A., 2017: Thrombocytopenia with tedizolid and linezolid. Several studies have suggested the risk of thrombocytopenia with tedizolid, a second-in-class oxazolidinone antibiotic (approved 06/2014), is less than that observed with linezolid (first-in-class oxazolidinone). Using data from the Food and Drug...

Swanepoel, C.; Jacobs, P.; Byrne, M.J.; Rayner, B.; Cassidy, M.J.; Meyer, J., 1996: The effect of recombinant human erythropoietin on haematopoiesis in patients undergoing haemodialysis. Objective: To define the effect of intravenous recombinant human erythropoietin (rHuEPO) in patients with anaemia caused by chronic renal failure. Data collection included bone marrow response, ferrokinetics, red cell survival as well as the influ...

Rodriguez D.L.Cruz, Mc, 1975: Resultados de los muestreos en aguas protegidas del litoral sonorense, temporada 1975. Serie Inform. lnstPesca: 1-27

Folk G.E.Jr; Folk M.A.; Craighead D., 1976: Daily rhythm of body temperature of wolverines. American Zoologist 16(2): 203

L.Maitre Dorothee, 1946: Sur la presence d'algues solenoporacees et mitcheldeaniees dans le trias de Slovaquie. Note on the presence of algal colonies belonging to the genera Solenopora and Cayeuxia in Triassic deposits of several localities in Slovakia, Czechoslovakia. The Cayeuxia constitute a connecting link between Paleozoic members of the Mitcheldeania...

Papoff; Fioretti; Arimondo, 1991: Return maps for intensity and time in a homoclinic-chaos model applied to a laser with a saturable absorber. Physical Review. A, Atomic, Molecular, and Optical Physics 44(7): 4639-4651

Hengl, G.; Prager, J.; Pointner, H., 1979: The influence of somatostatin on the absorption of triglycerides in partially gastrectomized subjects. Serum triglyceride levels were measured in 10 partially gastrectomized patients after an oral fat load of 100 g. Postprandial triglyceride elevation was completely blocked by somatostatin infusion. This depression cannot be an effect of delayed ga...

Maccubbin A.E.; Ersing N., 1991: Tumors in fish from the detroit river. A fish tumor survey was conducted in the Lower Detroit River during 1985 to 1987. Five species of fish were collected from sediment deposition zones and were examined for neoplasia. Neoplasms and related lesions were found in bullhead (Ictalurus n...

Mukai, K.; Yasuda, T.; Hara, K.; Funakawa, I.; Terao, A., 1996: Adult pneumococcal meningitis complicated by cerebral infarction: a case report. We describe a 36-year-old man with pneumococcal meningitis who suddenly showed a left central type facial palsy and left hemiparesis. Magnetic resonance imaging (MRI) revealed a low intensity area in the posterior limb and genu of the right intern...