None of the ergonomic interventions was more beneficial for any outcome measures when compared with another treatment or with no treatment or with placebo .
Behavioural interventions had inconsistent effects on pain and disability , with some subgroups showing benefit and others showing no significant improvement when compared with no treatment , minor intervention controls or other behavioural interventions .In the eight studies that evaluated various other interventions , there was no evidence of a clear beneficial effect of any of the interventions provided .
We found very low- quality evidence indicating that pain , recovery , disability and sick leave are similar after exercises when compared with no treatment , with minor intervention controls or with exercises provided as additional treatment to people with work-related complaints of the arm , neck or shoulder .
Low- quality evidence also showed that ergonomic interventions did not decrease pain at short-term follow-up but did decrease pain at long-term follow-up .
There was no evidence of an effect on other outcomes .
For behavioural and other interventions , there was no evidence of a consistent effect on any of the outcomes .
BACKGROUND Work-related upper limb disorder ( WRULD ) , repetitive strain injury ( RSI ) , occupational overuse syndrome ( OOS ) and work-related complaints of the arm , neck or shoulder ( CANS ) are the most frequently used umbrella terms for disorders that develop as a result of repetitive movements , awkward postures and impact of external forces such as those associated with operating vibrating tools .
Work-related CANS , which is the term we use in this review , severely hampers the working population .
OBJECTIVES To assess the effects of conservative interventions for work-related complaints of the arm , neck or shoulder ( CANS ) in adults on pain , function and work-related outcomes .
Effect of contrasting physical exercise interventions on rapid force capacity of chronically painful muscles.
Rapid force capacity of chronically painful muscles is inhibited markedly more than maximal force capacity and is therefore relevant to assess in rehabilitation setting s. Our objective was to investigate the effect of two contrasting types of physical exercise on rapid force capacity , as well as neural and muscular adaptations in women with chronic neck muscle pain . A group of employed women ( n = 42 ) with a clinical diagnosis of trapezius myalgia participated in a 10-wk r and omized controlled trial ; specific strength training of the neck/shoulder muscles , general fitness training performed as leg-bicycling ; or a reference intervention without physical activity . Maximal voluntary shoulder abductions were performed at static angles of 35 degrees and 115 degrees with simultaneous recording of electromyography ( EMG ) in the trapezius and deltoid . Maximal muscle strength and activation ( peak torque and peak EMG ) as well as rapid muscle strength and activation [ rate of torque development ( RTD ) and rate of EMG rise ] were subsequently determined . Trapezius muscle fiber characteristics were determined with ATPase histochemistry . Significant changes were observed only in the specific strength training group . Whereas peak torque increased 18 - 29 % ( P < 0.01 ) , RTD increased 61 - 115 % ( P < 0.001 ) . Peak EMG and rate of EMG rise increased correspondingly ( P < 0.05 - 0.001 ) , and trapezius type II muscle fibers hypertrophied 20 % ( P < 0.001 ) . In conclusion , rapid force capacity of chronically painful muscles is highly responsive to rehabilitation with specific strength training . The underlying mechanisms were related to both pain reduction and general neuromuscular adaptations to strength training . Potentially , the present method can be a useful clinical screening tool of muscle function in rehabilitation setting
None of the ergonomic interventions was more beneficial for any outcome measures when compared with another treatment or with no treatment or with placebo .
Behavioural interventions had inconsistent effects on pain and disability , with some subgroups showing benefit and others showing no significant improvement when compared with no treatment , minor intervention controls or other behavioural interventions .In the eight studies that evaluated various other interventions , there was no evidence of a clear beneficial effect of any of the interventions provided .
We found very low- quality evidence indicating that pain , recovery , disability and sick leave are similar after exercises when compared with no treatment , with minor intervention controls or with exercises provided as additional treatment to people with work-related complaints of the arm , neck or shoulder .
Low- quality evidence also showed that ergonomic interventions did not decrease pain at short-term follow-up but did decrease pain at long-term follow-up .
There was no evidence of an effect on other outcomes .
For behavioural and other interventions , there was no evidence of a consistent effect on any of the outcomes .
BACKGROUND Work-related upper limb disorder ( WRULD ) , repetitive strain injury ( RSI ) , occupational overuse syndrome ( OOS ) and work-related complaints of the arm , neck or shoulder ( CANS ) are the most frequently used umbrella terms for disorders that develop as a result of repetitive movements , awkward postures and impact of external forces such as those associated with operating vibrating tools .
Work-related CANS , which is the term we use in this review , severely hampers the working population .
OBJECTIVES To assess the effects of conservative interventions for work-related complaints of the arm , neck or shoulder ( CANS ) in adults on pain , function and work-related outcomes .