Altered Neuromuscular Activity of the Lower-Extremities During Landing Tasks in Patients with Anterior Cruciate Ligament Reconstruction: A Systematic Review of Electromyographic Studies
Publication in refereed journal
Officially Accepted for Publication

Altmetrics Information
.

Other information
AbstractCONTEXT:
Altered lower-limb biomechanics have been observed during landing task in patients with anterior cruciate ligament reconstruction (ACLR), which increases the risk of secondary anterior cruciate ligament injury. However, the alteration in neuromuscular activity of the lower-extremity during landing task is not clear.

OBJECTIVE:
To compare the muscle activity pattern assessed by electromyography between the involved limb of patients with ACLR and the contralateral limb or control limb of matched healthy subjects during landing task.

EVIDENCE ACQUISITION:
Database of PubMed, Ovid, Scopus, and Web of Science from the inception of the databases until July 2019, using a combination of keywords and their variations: (anterior cruciate ligament OR ACL) AND (electromyography OR EMG) AND (landing OR land). Studies that assessed lower-extremity muscle activity patterns during landing task in patients with ACLR and compared them either with the contralateral side or healthy controls were included.

EVIDENCE SYNTHESIS:
Of the 21 studies, 16 studies reported altered muscle activity pattern during landing tasks when compared with either the healthy controls or the contralateral side. For the specific muscle activity patterns, the majority of the studies showed no significant difference in reactive muscle activity, and comparisons across studies revealed a possible trend toward the early onset of quadriceps and hamstring activity and increased cocontraction of the involved limb. There are inconsistent findings regarding the alteration in muscle timing and preparatory muscle activity.

CONCLUSIONS:
Patients with ACLR displayed an altered muscle activity pattern during landing tasks, even though they were considered to be capable for sport return. Nevertheless, a firm conclusion could not be drawn due to great heterogeneity in the subject selection and study methods.
Acceptance Date01/05/2020
All Author(s) ListXin He, Hio Teng Leong, On Yue Lau, Michael Tim-Yun Ong, Patrick Shu-Hang Yung
Journal nameJournal of Sport Rehabilitation
Year2020
ISSN1056-6716
eISSN1543-3072
LanguagesEnglish-United States

Last updated on 2020-12-09 at 23:40