***TASK*** the task is to summarize an input biomedical literature in six sentences 
    ***INPUT*** the input is a biomedical literature 
    ***OUTPUT*** the output is the summary of an input biomedical literature in six sentences 
    ***DOCUMENTATION*** 
    ***EXAMPLES*** 
    Input: Abstract Objective : To evaluate the effectiveness of combinations of three methods to promote physical activity . Design : R and omised controlled trial . Baseline assessment with post-intervention follow up at 12 weeks and 1 year . Setting : One urban general practice , 1995 - 7 . Participants : 523 adults aged 40 to 64 years , r and omised to four intervention groups and a control group . Interventions : Brief ( one interview ) or intensive ( six interviews over 12 weeks ) motivational interviewing based on the stages of change model of behaviour change , with or without financial incentive ( 30 vouchers entitling free access to leisure facilities ) . Main outcome measures : Physical activity score ; sessions of moderate and vigorous activity in the preceding four weeks . Results : Response rate was 81 % at 12 weeks and 85 % at one year . More participants in the intervention group reported increased physical activity scores at 12 weeks than controls ( 38 % v 16 % , difference 22 % , 95 % confidence interval for difference 13 % to 32 % ) , with a 55 % increase observed in those offered six interviews plus vouchers . Vigorous activity increased in 29 % of intervention participants and 11 % of controls ( difference 18 % , 10 % to 26 % ) , but differences between the intervention groups were not significant . Short term increases in activity were not sustained , regardless of intensity of intervention . Conclusions : The most effective intervention for promoting adoption of exercise was the most intensive . Even this did not promote long term adherence to exercise . Brief interventions promoting physical activity that are used by many schemes in the United Kingdom are of question able effectiveness . Key messages Schemes promoting physical activity are currently popular in general practice in Britain , but few have been rigorously evaluated and their effectiveness is unknown . In this study , the most effective intervention for promoting adoption of physical activity was the most intensive , involving six motivational interviews and a financial incentive A comparatively brief intervention ( one interview ) was only effective in the short term in around a third of participants Short term increases in physical activity were not maintained at one year follow up and even the most intensive intervention was ineffective in promoting long term adherence to increased physical activity . National and local government , health authorities , and primary healthcare teams should be cautious about current and future expenditure on , and implementation of , exercise prescription or referral BACKGROUND Using peer volunteers as delivery agents may improve translation of evidence -based physical activity promotion programs for older adults . This study examined whether tailored support from older peer volunteers could improve initiation and long-term maintenance of physical activity behavior . METHODS Participants were r and omized to 2 16-week , group-based  programs : ( 1 ) peer-delivered , theory-based support for physical activity behavior change ; or ( 2 ) an intervention typically available in community setting s ( basic education , gym membership , and pedometer for self-monitoring ) , attention-matched with health education .  Moderate-to-vigorous physical activity ( MVPA ) was assessed via daily self-report logs at baseline , at the end of the intervention ( 16 weeks ) , and at follow-up ( 18 months ) , with accelerometry validation ( RT3 ) in a r and om sub sample . RESULTS Seven peer volunteers and 81 sedentary adults were recruited .  Retention at the end of the trial was 85 % and follow-up at 18 months was 61 % . Using intent-to-treat analyses , at 16 weeks , both groups had similar significant improvements in MVPA . At 18 months , the group supplemented with peer support had significantly more MVPA . CONCLUSIONS Trained peer volunteers may enhance long-term maintenance of physical activity gains from a community-based intervention . This approach has great potential to be adapted and delivered inexpensively in community setting Background Following an extensive recruitment campaign , a 16-week lunchtime intervention to increase walking was implemented with insufficiently physically active University employees to examine programme feasibility and the effects of the programme in increasing walking behaviour , and in improving well-being and work performance . Methods / design A feasibility study in which participants were r and omised to an immediate treatment or a delayed treatment control ( to start at 10 weeks ) group . For the first ten weeks of the intervention , participants took part in three facilitator-led group walks per week each of thirty minutes duration and were challenged to accumulate another sixty minutes of walking during the weekends . In the second phase of the intervention , the organised group walks ceased to be offered and participants were encouraged to self-organise their walks . Motivational principles were employed using contemporary motivational theory . Outcome measures ( including self-reported walking , step counts , cardiovascular fitness , general and work-related well-being and work performance ) were assessed at baseline , at the end of the 16-week intervention and ( for some ) four months after the end of the intervention . Process and outcome assessment s were also taken throughout , and following , the intervention . Discussion The results of the intervention will determine the feasibility of implementing a lunchtime walking programme to increase walking behaviour , well-being and performance in sedentary employees . If successful , there is scope to implement definitive trials across a range of worksites with the aim of improving both employee and organisational health . Trial registration Current Controlled Trials IS RCT N81504663 Mediation analyses in faith-based physical activity ( PA ) interventions targeting African-American adults are lacking . The purpose of this study was to examine the psychosocial mediators of a faith-based PA intervention with African-American adults . Churches were r and omly assigned to receive immediate or delayed ( 1-year later ) training in PA program implementation . A sub sample of participants from r and omly selected churches took part in telephone surveys at baseline and at 1 year . The primary outcome was percentage of participants meeting PA recommendations . MacKinnon 's product of coefficients was used to test for mediation . Participants ( n = 418 ) from 20 churches completed the baseline and 1-year follow-up surveys . There were no statistically significant changes in PA behavior at 1 year . The intervention had a marginally significant effect on increasing the amount of instrumental church support received by church members . However , none of the psychosocial variables tested were found to be significant mediators of the intervention . Mediation analyses provided insight into potential reasons as to why the Health-e-AME intervention did not change PA . The intervention did not successfully change the targeted mediators hypothesized to change PA . Potential reasons for these shortcomings as well as issues to address in future faith-based studies are discussed This paper reports on the cost-effectiveness of pedometer-based versus time-based Green Prescriptions in improving physical activity and health-related quality of life ( EQ-5D ) in a r and omised controlled trial of 330 low-active , community-based adults aged 65 years and over . Costs , measured in $ NZ ( NZ$1=A$0.83 , December 2008 ) , comprised public and private health care costs plus exercise-related personal expenditure . Based on intention-to-treat data at 12-month follow up , the pedometer group showed a greater increase in weekly leisure walking ( 50.6 versus 28.1min for the time-based group , adjusted means , P=0.03 ) . There were no significant between-group differences in costs . The incremental cost-effectiveness ratios , for the pedometer-based versus time-based Green Prescription , per 30min of weekly leisure walking and per quality -adjusted life year were , ( i ) when including only community care costs , $ 115 and $ 3105 , ( ii ) when including only exercise and community care costs , $ 130 and $ 3500 , and ( iii ) for all costs , -$185 and -$4999 , respectively . The cost-effectiveness acceptability curves showed that the pedometer-based compared with the time-based Green Prescription was statistically cost-effective , for the above cost categories , at the following quality -adjusted life year thresholds : ( i ) $ 30000 ; ( ii ) $ 30500 ; and ( iii ) $ 16500 . The additional program cost of converting one sedentary adult to an active state over a 12-month period was $ 667 . The outcomes suggest the pedometer-based Green Prescription may be cost-effective in increasing physical activity and health-related quality of life over 12 months in previously low-active older adults BACKGROUND Physical activity promotion is a priority , but contribution of physicians ' interventions is unclear . The effectiveness of the PEPAF ( " Experimental Program for Physical Activity Promotion " ) , which was implemented exclusively by physicians in routine primary care from October 2003 to December 2004 , was assessed . METHODS Fifty-six Spanish family physicians were r and omized to either the intervention ( n = 29 ) or st and ard care ( n = 27 ) arm of the trial . The physicians recruited 4317 physically inactive patients ( 2248 for intervention and 2069 for control protocol s ) from a systematic sample after assessing their physical activity in routine practice . Intervention physicians provided advice to all patients and a physical activity prescription to the subgroup attending an additional appointment ( 30 % ) . The main outcome measure was the change in physical activity measured by blinded nurses using the 7-Day Physical Activity Recall . Secondary outcomes included cardiorespiratory fitness and health-related quality of life . RESULTS At 6 months , intervention patients increased physical activity more than controls ( adjusted difference , 18 min/wk [ 95 % confidence interval , 6 - 31 min/wk ] ; metabolic equivalent tasks x hours per week , 1.3 [ 95 % CI , 0.4 - 2.2 ] ) . The proportion of the population achieving minimal physical activity recommendations was 3.9 % higher in the intervention group ( 1.2%-6.9 % ; number needed to treat , 26 ) . No differences were found in secondary outcomes . The effect of intervention was positively modified in subjects older than 50 years ( P < or = .01 ) and in the prescription subgroup ( P < .001 ) . CONCLUSIONS Family physicians were effective for increasing physical activity of primary care patients . Overall clinical effect was small but relevant for population public health . Within the intervention program , clinical ly relevant effects were seen in patients receiving a physical activity prescription . Trial Registration clinical trials.gov Identifier : NCT00131079 Background Limited data are available on the development , implementation and evaluation processes of physical activity promotion programmes among older adults . More integrative insights into interventions describing the planned systematic development , implementation and evaluation are needed . Methods and design The purpose of this study is to give an integrative insight into the development of the Active plus programme applying the six-step Intervention Mapping protocol . The Active plus programme consisted of two theory- and evidence -based tailored physical activity promotion interventions , both comprising three tailored letters delivered over four months and aim ed at raising awareness of insufficient physical activity , and stimulating physical activity initiation and maintenance among the over-fifties . The first intervention , the basic tailored intervention , provided tailored letters that intervened on the psychosocial determinants of physical activity . The second intervention , the intervention plus , provided the same tailored information but additionally provided tailored information about physical activity opportunities in the specific environment in which the older adults lived . This environment-based component also provided access to a forum and e-buddy system on a website . A plan for implementation and evaluation is also described . Discussion The planned development of the Active plus programme result ed in two theory- and evidence -based tailored physical activity interventions targeted at the over-fifties . Trial Registration Dutch Trial Register NTR OBJECTIVE We evaluate the 6-month efficacy of Keep Active Minnesota , a phone- and mail-based physical activity maintenance intervention design ed for use with adults age 50 to 70 years who have increased their physical activity within the past year . METHOD Participants ( N=1049 ) recruited in 2004 and 2005 from one large managed-care organization in Minnesota were r and omly assigned to either treatment ( N=523 ) or usual care ( N=526 ) with physical activity assessed using the Community Healthy Activities Model Program for Seniors question naire , and expressed as kcal/week expenditures . RESULTS Total physical activity at baseline was similar for treatment and usual care participants ( p<0.44 ) as was moderate/vigorous physical activity ( p<0.21 ) . Maintenance of physical activity was higher among treatment participants whose mean 6-month change in total kcal/week energy expenditure was -91 , compared to -683 for usual care participants ( p<0.002 ) . Mean 6-month change in kcal/week expenditure in moderate or vigorous activities was -49 for treatment participants , compared to -612 for usual care participants ( p<0.001 ) . CONCLUSIONS This phone- and mail-based physical activity maintenance intervention is efficacious at maintaining physical activity at 6 months Background Scotl and has a policy aim ed at increasing physical activity levels in the population , but evidence on how to achieve this is still developing . Studies that focus on encouraging real world participants to start physical activity in their setting s are needed . The Walking for Well-being in the West study was design ed to assess the effectiveness of a pedometer-based walking programme in combination with physical activity consultation . The study was multi-disciplinary and based in the community . Walking for Well-being in the West investigated whether Scottish men and women , who were not achieving the current physical activity recommendation , increased and maintained walking behaviour over a 12 month period . This paper outlines the rationale and design of this innovative and pragmatic study . Methods Participants were r and omised into two groups : Group 1 : Intervention ( pedometer-based walking programme combined with a series of physical activity consultations ) ; Group 2 : Waiting list control for 12 weeks ( followed by minimal pedometer-based intervention ) . Physical activity ( primary outcome ) was measured using  pedometer step counts ( 7 day ) and the International Physical Activity Question naire ( long version ) . Psychological processes were measured using question naires relating to the Transtheoretical Model of Behaviour Change , m 
    Output:
    
The most effective interventions applied a tailored approach to the type of PA and used telephone contact to provide feedback and to support changes in PA levels .
We found consistent evidence to support the effectiveness of remote and web 2.0 interventions for promoting PA .
These interventions have positive , moderate sized effects on increasing self-reported PA and measured cardio-respiratory fitness , at least at 12 months .
The effectiveness of these interventions was supported by moderate and high quality studies .