Comparing targeted thrust manipulation with general thrust manipulation in patients with low back pain. A general approach is as effective as a specific one. A randomised controlled trial.

BACKGROUND: Spinal manipulation is commonly used to treat back pain. The application of spinal manipulation has traditionally involved an element of targeting the technique to a level of the spine where the proposed movement dysfunction is sited. We evaluated the effects of a targeted manipulative thrust versus a thrust applied generally to the lumbar region. METHODS: A randomised controlled clinical trial in patients with low back pain following CONSORT (Consolidated Standards of Reporting Trials) guidelines. Sixty subjects were randomly allocated to two groups: one group received a targeted manipulative thrust (n=29) and the other a general manipulation thrust (GT) (n=31) to the lumbar spine. Thrust was either localised to a clinician-defined symptomatic spinal level or an equal force was applied through the whole lumbosacral region. We measured pressure-pain thresholds (PPTs) using algometry and muscle activity (magnitude of stretch reflex) via surface electromyography. Numerical ratings of pain and Oswestry Disability Index scores were collected. RESULTS: Repeated measures of analysis of covariance revealed no between-group differences in self-reported pain or PPT for any of the muscles studied. SUMMARY: A GT procedure-applied without any specific targeting-was as effective in reducing participants' pain scores as targeted approaches. TRIAL REGISTRATION NUMBER: ISRCTN11994230.

Do the effects of testosterone on muscle strength, physical function, body composition, and quality of life persist six months after treatment in intermediate-frail and frail elderly men?

CONTEXT: Short-term testosterone (T) treatment in frail elderly men improves muscle mass and strength. It is unclear whether these effects can be maintained post treatment. OBJECTIVE: To assess the durability of androgen effects in frail men. DESIGN AND SETTING: Single center, randomized, double-blind, placebo-controlled trial to investigate the effects of 6 months T (25-75 mg daily) on muscle strength, body composition, physical function, and quality of life (QoL). Participants were assessed at the end of treatment (6 months) and 6 months after treatment cessation (12 months). PARTICIPANTS: 274 intermediate-frail and frail elderly men aged 65-90 years with low T levels. RESULTS: Mean T increased from 11.1 (3.1) nmol/liter at baseline to 18.4 (3.5) nmol/liter at 6 months, then declined to 10.5 (3.7) nmol/L at 12 months, in the T-treated group. Isometric knee extension peak torque increased in the T-treated group compared with placebo to give an adjusted mean difference (95% CI) between groups of 8.1 (-0.2 to 16.5) Nm at 6 months. Lean mass increased in the T-treated group giving a difference between groups of 1.2 (0.8 to 1.7) kg at 6 months. Somatic and sexual symptoms improved during treatment. None of these differences between groups remained at 12 months. Prostate specific antigen (PSA) levels and haematocrit increased slightly during treatment but returned to baseline by 12 months. CONCLUSION: The effects of 6-month T treatment on muscle strength, lean mass, and QoL in frail men are not maintained at 6 months post treatment.

Effects of testosterone on skeletal muscle architecture in intermediate-frail and frail elderly men.

BACKGROUND: Testosterone increases lean mass and may help to counter the changes in muscle architecture associated with sarcopenia. This study was designed to investigate the effects of testosterone replacement therapy on skeletal muscle architecture in intermediate-frail and frail elderly men. METHODS: A subgroup of 30 intermediate-frail and frail elderly men (65-89 years) with low to borderline-low testosterone levels were enrolled from a single-center randomized, double-blind placebo-controlled trial. Participants received either a transdermal testosterone (50 mg) or placebo gel daily for 6 months. Architecture (muscle thickness, fascicle length, and pennation angle) of the gastrocnemius medialis muscle was assessed by ultrasound imaging at baseline and after 6 months of treatment. RESULTS: Serum testosterone increased from 11.6 ± 3.5 to 18.0 ± 8.1 nmol/L by 10 days after randomization in the active group (but not the placebo group) and was maintained throughout the treatment period. Testosterone treatment resulted in a preservation of muscle thickness at 6 months while it decreased in the placebo group (effect size 1.4 [95% confidence interval = 0.3-2.5; p = .015]). There was no significant effect of treatment on fascicle length (effect size 1.9 mm [95% confidence interval = -1.2 to 5.0 mm; p = .22]) or pennation angle (effect size 1.2° [95% confidence interval = -1.3 to 3.7°; p = .32]). CONCLUSIONS: Testosterone replacement in intermediate-frail and frail elderly men is associated with preservation of muscle thickness. The results suggest that testosterone mitigates sarcopenia by improving muscle tissue to maintain a state of normality in aging men.

Effects of testosterone on muscle strength, physical function, body composition, and quality of life in intermediate-frail and frail elderly men: a randomized, double-blind, placebo-controlled study.

CONTEXT: Physical frailty is associated with reduced muscle strength, impaired physical function, and quality of life. Testosterone (T) increases muscle mass and strength in hypogonadal patients. It is unclear whether T has similar effects in intermediate-frail and frail elderly men with low to borderline-low T. OBJECTIVE: Our objective was to determine the effects of 6 months T treatment in intermediate-frail and frail elderly men, on muscle mass and strength, physical function, and quality of life. DESIGN AND SETTING: We conducted a randomized, double-blind, placebo-controlled, parallel-group, single-center study. PARTICIPANTS: PARTICIPANTS were community-dwelling intermediate-frail and frail elderly men at least 65 yr of age with a total T at or below 12 nmol/liter or free T at or below 250 pmol/liter. METHODS: Two hundred seventy-four participants were randomized to transdermal T (50 mg/d) or placebo gel for 6 months. Outcome measures included muscle strength, lean and fat mass, physical function, and self-reported quality of life. RESULTS: Isometric knee extension peak torque improved in the T group (vs. placebo at 6 months), adjusted difference was 8.6 (95% confidence interval, 1.3-16.0; P = 0.02) Newton-meters. Lean body mass increased and fat mass decreased significantly in the T group by 1.08 +/- 1.8 and 0.9 +/- 1.6 kg, respectively. Physical function improved among older and frailer men. Somatic and sexual symptom scores decreased with T treatment; adjusted difference was -1.2 (-2.4 to -0.04) and -1.3 (-2.5 to -0.2), respectively. CONCLUSIONS: T treatment in intermediate-frail and frail elderly men with low to borderline-low T for 6 months may prevent age-associated loss of lower limb muscle strength and improve body composition, quality of life, and physical function. Further investigations are warranted to extend these results.

Expectations and satisfaction of patients with low back pain attending a multidisciplinary rehabilitation service.

BACKGROUND AND PURPOSE: To identify the expectations of service, and degree of satisfaction, with a multidisciplinary service for patients with low back pain, and to examine the strength of association between patients' satisfaction and expectations. METHOD: A three-stage study design was used. concerns were identified by a focus group; priority issues were identified by ranking by use of a Delphi consensus questionnaire; satisfaction or expectation questionnaires were also used to rate patients' satisfaction and the degree to which expectations were met. SUBJECTS: Three convenience samples of patients with low back pain were recruited. Ten patients attended the focus group, 55 completed the Delphi consensus questionnaire and 40 completed the satisfaction or expectation questionnaires. RESULTS: Patients rated a clear diagnosis and effective treatment as important, and the ease with which they could access the service and post-discharge follow-up as important issues when judging satisfaction. Patients rated their overall satisfaction and meeting their expectations higher than specific service issues, and the strengths of the associations between the two constructs varied from concern to concern. CONCLUSION: Certain aspects of service provision are rated with greater importance than others when patients judge a service they have experienced. There are differences in the strength of associations between the constructs of patient satisfaction and meeting expectations of service, specific to the individual service concern that is being evaluated. The present study provides more evidence that specific concerns within service provision should be identified before evaluating patients' expectations and satisfaction with the service overall.