Manual Therapy Effects on Nonspecific Neck Pain Are Not Mediated by Mechanisms Related to Conditioned Pain Modulation: A Randomized Clinical Trial.

BACKGROUND: Manual therapy (MT) is a treatment recommended by clinical practice guidelines in the management of patients with neck pain. However, the mechanisms through which MT works remain unknown. The aim of the present study is to investigate if MT is mediated by mechanisms related to conditioned pain modulation (CPM), comparing the effects of painful with a pain-free MT treatment. METHODS: A two-arm, parallel, randomized controlled clinical trial with concealed allocation and blinding of the outcome assessor was conducted in university students with chronic or recurrent nonspecific neck pain (NSNP). Participants received either a painful or pain-free MT session. Psychophysical variables including pressure pain thresholds, CPM, temporal summation of pain and cold pain intensity were assessed before and immediately after treatment. In addition, changes in neck pain intensity over the following 7 days and self-perceived improvement immediately and 7 days after treatment were assessed. RESULTS: No significant differences were found between groups in any of the psychophysical variables or in patients' self-perceived improvement. Only a significantly greater decrease in neck pain intensity immediately after treatment was found in the pain-free MT group compared to the painful MT group. CONCLUSION: The results suggest that the immediate and short-term effects of MT on NSNP are not mediated by CPM-related mechanisms.

Evolution of physical function, cognition, depressive mood, and quality of life during the Covid-19 pandemic in prefrail elderly people: A longitudinal cohort study (Covid-Mefap).

Confinement due to the COVID-19 pandemic has had a major impact on the living habits and health of the population, notably in the pre-frail elderly. This study aimed to study the effect of the COVID-19 pandemic on the physical function, mental function (cognition and mood), and quality of life of pre-frail elderly individuals over 70 years of age following confinement as well as to analyze the variables associated with the observed changes. METHODS: Observational study of a cohort of pre-frail community-dwelling older adults over 70 years of age during the COVID-19 pandemic conducted in primary care. VARIABLES: The main outcome variables were recorded during face-to-face interviews between December 14 of 2020 and August 12 of 2021 using scales for the evaluation of physical function (Short Physical Performance Battery), cognition (Lobo's Mini-Examen Cognoscitivo), depressive mood (Geriatric Depression Scale), and quality of life (EuroQol-5D-3L). Covariates: sociodemographic data and variables related to the pandemic and general health (social support network, COVID-19 infection, exercising, and leisure activities) were also collected. ANALYSIS: The Student's t-test for paired samples and multivariate linear regression models were employed for the statistical analyses. RESULTS: Ninety-two subjects were included in the study. Physical function, cognition, and depressive mood improved during the pandemic, whereas no changes were observed in quality of life. Suffering from COVID-19 was associated with deterioration of the cognitive function (-1.460; CI95%: -2.710 to -0.211). CONCLUSION: Confinement due to the COVID-19 pandemic was not associated with a decline in physical function, cognition, depressive mood, or quality of life in pre-frail individuals over 70 years of age.

Effects of Virtual Reality versus Exercise on Pain, Functional, Somatosensory and Psychosocial Outcomes in Patients with Non-specific Chronic Neck Pain: A Randomized Clinical Trial.

Background: Virtual reality (VR) applied to patients with neck pain is a promising intervention to produce positive effects when used alone or combined with exercise. Therefore, the objective of this manuscript is to compare the effects of VR versus exercise treatment on pain intensity, conditioned pain modulation (CPM), temporal summation (TS) and functional and somatosensory outcomes in patients with non-specific chronic neck pain (NS-CNP). Methods: A single-blinded, randomized clinical trial was carried out. A total sample of 44 patients with NS-CNP was randomized into a VR treatment group or neck exercises group. The intervention consisted of two treatment sessions per week, for four weeks and eight sessions. Four measurement moments (at baseline, immediately, 1 month, and 3 months after intervention) were considered. Pain intensity, CPM, TS, functional and somatosensory outcomes were measured. Results: Statistically significant differences were revealed for time factor (F = 16.40, p < 0.01, ηp2 = 0.28) and group*time interaction for kinesiophobia (F = 3.89, p = 0.01, ηp2 = 0.08) showing post-hoc differences in favor of the VR group at 3 months (p < 0.05, d = 0.65). Significant effects were shown for time factor (p < 0.05) but not for the group*time interaction (p > 0.05) for pain intensity, rotation range of motion (ROM), Neck Disability Index, pain catastrophizing, fear-avoidance beliefs, left side pressure pain threshold (PPT) and anxiety. Statistically significant differences were not found for time factor (p > 0.05) and neither in group*time interaction (p > 0.05) for CPM, TS, right side PPT, flexo-extension and lateral-flexion ROM. Conclusions: Kinesiophobia was the only outcome that showed differences between VR and exercise at 3 months. Nevertheless, pain intensity, CPM, TS, ROM, neck disability, pain catastrophizing, fear-avoidance beliefs, PPT and anxiety did not show differences between both interventions.