Dataset Information

Changes in walking and running in patients with hip dysplasia.

ABSTRACT: Earlier studies have suggested that the hip extension angle and the hip flexor moment in walking are affected by hip dysplasia, but to our knowledge there have been no reports on running or evaluations of self-reported health. We evaluated differences in walking, running, and self-reported health between young adults with symptomatic hip dysplasia and healthy controls.Walking and running in 32 patients with hip dysplasia, mean 34 (18-53) years old, was compared with walking and running in 32 controls, mean 33 (18-54) years old. Joint kinematics and kinetics-quantified by the peak hip extension angle and the peak net joint moment of hip flexion during walking and running-were recorded using a motion-capture system, and health was evaluated using the Copenhagen Hip and Groin Outcome Score (HAGOS).The peak hip extension angle during walking was less in the patients than in the controls (-10.4 (SD 4.8) degrees vs. -13.2 (SD 4.5) degrees; p = 0.02). Similarly, the peak net joint moment of hip flexion during walking was lower in the patients than in the controls (0.57 (SD 0.13) N*m/kg vs. 0.70 (SD 0.22) N*m/kg; p = 0.008). In all dimensions of HAGOS, the patients scored lower than the controls. Furthermore, the hip extension angle and the net joint moment of hip flexion correlated with the HAGOS subscales pain and physical function in sport and recreation.Patients with symptomatic hip dysplasia do modify walking and running, and we therefore suggest that the impairment found in this study should play an important role in the evaluation of later operative and training interventions.

SUBMITTER: Jacobsen JS

PROVIDER: S-EPMC3715823 | biostudies-literature | 2013 Jun

REPOSITORIES: biostudies-literature

ACCESS DATA

Publications

Changes in walking and running in patients with hip dysplasia.

Jacobsen Julie S JS Nielsen Dennis B DB Sørensen Henrik H Søballe Kjeld K Mechlenburg Inger I

Acta orthopaedica 20130417 3

<h4>Background and purpose</h4>Earlier studies have suggested that the hip extension angle and the hip flexor moment in walking are affected by hip dysplasia, but to our knowledge there have been no reports on running or evaluations of self-reported health. We evaluated differences in walking, running, and self-reported health between young adults with symptomatic hip dysplasia and healthy controls.<h4>Patients and methods</h4>Walking and running in 32 patients with hip dysplasia, mean 34 (18-53 ...[more]

PMID: 23594221

Similar Datasets

Project description:BackgroundWalking and running are the most common means of locomotion in human daily life. People have made advances in developing separate exoskeletons to reduce the metabolic rate of walking or running. However, the combined requirements of overcoming the fundamental biomechanical differences between the two gaits and minimizing the metabolic penalty of the exoskeleton mass make it challenging to develop an exoskeleton that can reduce the metabolic energy during both gaits. Here we show that the metabolic energy of both walking and running can be reduced by regulating the metabolic energy of hip flexion during the common energy consumption period of the two gaits using an unpowered hip exoskeleton.MethodsWe analyzed the metabolic rates, muscle activities and spatiotemporal parameters of 9 healthy subjects (mean ± s.t.d; 24.9 ± 3.7 years, 66.9 ± 8.7 kg, 1.76 ± 0.05 m) walking on a treadmill at a speed of 1.5 m s-1 and running at a speed of 2.5 m s-1 with different spring stiffnesses. After obtaining the optimal spring stiffness, we recruited the participants to walk and run with the assistance from a spring with optimal stiffness at different speeds to demonstrate the generality of the proposed approach.ResultsWe found that the common optimal exoskeleton spring stiffness for walking and running was 83 Nm Rad-1, corresponding to 7.2% ± 1.2% (mean ± s.e.m, paired t-test p < 0.01) and 6.8% ± 1.0% (p < 0.01) metabolic reductions compared to walking and running without exoskeleton. The metabolic energy within the tested speed range can be reduced with the assistance except for low-speed walking (1.0 m s-1). Participants showed different changes in muscle activities with the assistance of the proposed exoskeleton.ConclusionsThis paper first demonstrates that the metabolic cost of walking and running can be reduced using an unpowered hip exoskeleton to regulate the metabolic energy of hip flexion. The design method based on analyzing the common energy consumption characteristics between gaits may inspire future exoskeletons that assist multiple gaits. The results of different changes in muscle activities provide new insight into human response to the same assistive principle for different gaits (walking and running).

Dataset Information

Changes in walking and running in patients with hip dysplasia.

Publications

Changes in walking and running in patients with hip dysplasia.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets