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Time-course changes associated with PA lumbar mobilizations on lumbar and hamstring range of motion: a randomized controlled crossover trial

Chesterton, Paul, Evans, Will, Nick, Livadas and McLaren, Shaun (2018) Time-course changes associated with PA lumbar mobilizations on lumbar and hamstring range of motion: a randomized controlled crossover trial. Journal of Manual & Manipulative Therapy. ISSN 1066-9817

Item Type: Article


Objective: We aimed to compare the post-intervention time-course changes in active knee extension (AKE) and active lumbar flexion (ALF) range of motion in response to unilateral posterior–anterior (UPA) mobilizations of the lumbar spine (L4/5 zygapophyseal).

Methods: Twenty-four asymptomatic participants (maleness: 0.58, age [mean ± standard deviation]: 32 ± 8 years, body mass index 25.9 ± 2.6 kg m2) were recruited to a fully controlled crossover trial. Following either the intervention (L4/5 zygapophyseal mobilizations) or control, participants immediately performed the AKE and ALF tests, which were also performed at baseline. Subsequent tests were made at intervals of 5, 10, 15, 20, 25, 30, 45 and 60 min.

Results: After adjustment for baseline (mean AKE: 37.2° from full extension, mean ALF: 14.37 cm), sex and age, UPA lumbar mobilizations had a most likely moderate effect on AKE (9.8° closer to full extension; ±1.9) and a likely moderate effect on ALF (1.34 cm; ±90% confidence limits 0.43). The magnitude of the AKE effect became most likely small 20-min posttreatment (5.3; ±1.7) and possibly small/possibly trivial 60-min posttreatment (2.1; ±1.4). For ALF, the magnitude of the effect became most likely small 15-min posttreatment (0.76; ±0.25), possibly small/possibly trivial 25-min posttreatment (0.38; ±0.18) and likely trivial 60-min posttreatment (0.26; ±1.8).

Discussion: UPA lumbar mobilizations increased lumbar Range of Motion and hamstring extensibility by a moderate magnitude, with the effect reducing after 10–20-min posttreatment. Clinicians should consider these time-course changes when applying UPA lumbar mobilizations.

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More Information

Depositing User: Will Evans


Item ID: 10201
Identification Number:
ISSN: 1066-9817
Official URL:

Users with ORCIDS

ORCID for Paul Chesterton: ORCID iD
ORCID for Will Evans: ORCID iD
ORCID for Livadas Nick: ORCID iD
ORCID for Shaun McLaren: ORCID iD

Catalogue record

Date Deposited: 27 Nov 2018 09:34
Last Modified: 18 Dec 2019 16:07


Author: Paul Chesterton ORCID iD
Author: Will Evans ORCID iD
Author: Livadas Nick ORCID iD
Author: Shaun McLaren ORCID iD

University Divisions

Faculty of Health Sciences and Wellbeing
Faculty of Health Sciences and Wellbeing > School of Nursing and Health Sciences


Sciences > Health Sciences
Sciences > Sport Sciences

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