Constant low-to-moderate mechanical asymmetries during 800-m track running.
Front Sports Act Living
; 6: 1278454, 2024.
Article
en En
| MEDLINE
| ID: mdl-38313218
ABSTRACT
Introduction:
Modifications in asymmetry in response to self-paced efforts have not been thoroughly documented, particularly regarding horizontally-derived ground reaction force variables. We determined the magnitude and range of gait asymmetries during 800â m track running.Methods:
Eighteen physical education students completed an 800â m self-paced run on a 200â m indoor track. During the run, vertical and horizontal ground reaction forces were measured at a sampling frequency of 500â Hz using a 5â m-long force platform system, with data collected once per lap. The following mechanical variables were determined for two consecutivesteps:
contact time and duration of braking/push-off phases along with vertical/braking/push-off peak forces and impulses. The group mean asymmetry scores were evaluated using the "symmetry angle" (SA) formula, where scores of 0% and 100% correspond to perfect symmetry and perfect asymmetry, respectively.Results:
There was no influence of distance interval on SA scores for any of the nine biomechanical variables (P ≥ 0.095). The SA scores were â¼1%-2% for contact time (1.3 ± 0.5%), peak vertical forces (1.8 ± 0.9%), and vertical impulse (1.7 ± 1.0%). The SA scores were â¼3%-8% for duration of braking (3.6 ± 1.1%) and push-off (3.2 ± 1.4%) phases, peak braking (5.0 ± 2.1%) and push-off (6.9 ± 3.1%) forces as well as braking (7.6 ± 2.3%) and push-off (7.7 ± 3.3%) impulses. The running velocity progressively decreased at 300â m and 500â m compared to that at 100â m but levelled off at 700â m (P < 0.001).Discussion:
There were no modifications in gait asymmetries, as measured at 200-m distance intervals during 800-m track running in physical education students. The 800â m self-paced run did not impose greater mechanical constraints on one side of the body. Experimental procedures for characterizing the gait pattern during 800â m track running could be simplified by collecting leg mechanical data from only one side.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
Front Sports Act Living
Año:
2024
Tipo del documento:
Article
País de afiliación:
Australia
Pais de publicación:
Suiza