***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 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 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 OBJECTIVES To determine the effects of primary care-based , multicomponent physical activity counseling ( PAC ) promoting physical activity ( PA ) guidelines on gait speed and related measures of PA and function in older veterans . DESIGN R and omized controlled trial . SETTING Veterans Affairs Medical Center of Durham , North Carolina . PARTICIPANTS Three hundred ninety-eight male veterans aged 70 and older . INTERVENTION Twelve months of usual care ( UC ) or multicomponent PAC consisting of baseline in-person and every other week and then monthly telephone counseling by a lifestyle counselor , one-time clinical endorsement of PA , monthly automated telephone messaging from the primary care provider , and quarterly tailored mailings of progress in PA . MEASUREMENTS Gait speed ( usual and rapid ) , self-reported PA , function , and disability at baseline and 3 , 6 , and 12 months . RESULTS Although no between-group differences were noted for usual gait speed , rapid gait speed improved significantly more for the PAC group ( 1.56 + /- 0.41 m/s to 1.68 + /- 0.44 m/s ) than with UC ( 1.57 + /- 0.40 m/sec to 1.59 + /- 0.42 m/sec , P=.04 ) . Minutes of moderate/vigorous PA increased significantly in the PAC group ( from 57.1 + /- 99.3 to 126.6 + /- 142.9 min/wk ) but not in the UC group ( from 60.2 + /- 116.1 to 69.6 + /- 116.1 min/wk , P<.001 ) . Changes in other functional/disability outcomes were small . CONCLUSION In this group of older male veterans , multicomponent PA significantly improved rapid gait and PA . Translation from increased PA to overall functioning was not observed . Integration with primary care was successful This study examined the influence of a 1-year brisk walking programme on endurance fitness and the amount and distribution of body fat in a group of formerly sedentary men . Seventy-two males , aged 42–59 years , body mass index 25.2 ( 0.3 ) kg·m−2 [ mean ( SEM ) ] , were r and omly allocated to either a walking group ( n = 48 ) or control group ( n = 24 ) . Brisk walking speed was evaluated using a 1.6-km track walk . Changes in endurance fitness were assessed by measuring blood lactate concentration and heart rate during submaximal treadmill walking . Body composition was determined by hydrostatic weighing and anthropometry ; energy intake was assessed from 7-day weighed food inventories . Differences in the response of walkers and controls were examined using two-way analyses of variance . Forty-two walkers ( 87.5 % ) completed the study and averaged 27.9 ( 1.4 ) min·day−1 of  brisk walking ( range 11–46 ) . Brisk walking speed averaged 1.95 ( 0.03 ) m·s−1 and elicited approximately 68 ( 1 ) % of maximum heart rate . Heart rate and blood lactate concentration during submaximal treadmill walking were significantly reduced in the walkers after 3 , 6 and 12 months and the oxygen uptake at a reference blood lactate concentration of 2 mmol·l−1 was increased by 3.2 ml·kg−1 . min−1 ( 14.9 % ) in the walkers at 6 months ( P < 0.01 ) . Although skinfold thicknesses at anterior thigh and medial calf sites decreased significantly for the walkers , the response of the two groups did not differ significantly for other body composition variables or for energy intake Background —Family members of patients with cardiovascular disease ( CVD ) may be at increased risk due to shared genes and lifestyle . Hospitalization of a family member with CVD may represent a “ motivational moment ” to take preventive action . Methods and Results —A r and omized , controlled clinical trial was conducted in healthy adult family members ( N=501 ; 66 % female ; 36 % nonwhite ; mean age , 48 years ) of patients hospitalized with CVD to evaluate a special intervention ( SI )  with personalized risk factor screening , therapeutic lifestyle-change counseling , and progress reports to physicians versus a control intervention ( CIN ) on the primary outcome , mean percent change in low-density lipoprotein cholesterol ( LDL-C ) , and other risk factors . Vali date d dietary assessment s and st and ardized risk factors were obtained at baseline and 1 year ( 94 % follow-up ) . At baseline , for 93 % of subjects , saturated fat comprised ≥7 % of total caloric intake , and 79 % had nonoptimal LDL-C levels ( of which 50 % were unaware ) . There was no difference in the SI versus the CIN with respect to the mean percent change in LDL-C ( −1 % versus −2 % , respectively ; P=0.64 ) , owing to a similar significant reduction in LDL-C in both groups ( −4.4 mg/dL and −4.5 mg/dL , respectively ) . Diet score significantly improved in the SI versus the CIN ( P=0.04 ) . High-density lipoprotein cholesterol declined significantly in the CIN but not in the SI ( −3.2 % [ 95 % CI , −5.1 to −1.3 ] versus + 0.3 % [ 95 % CI , −1.7 to + 2.4 ] ; P=0.01 ) . At 1 year , SI subjects were more likely than controls to exercise > 3 days per week ( P=0.04 ) . Conclusion —The SI was not more effective than the CIN in reducing the primary end point , LDL-C. The screening process identified many family members of hospitalized patients with CVD who were unaware of their risk factors , and further work is needed to develop and test interventions to reduce their CVD risk To study the impact of diet and exercise and the combination thereof on cardiovascular risk factors , 157 healthy men aged 35 - 60 years ( mean + /- S.D. ; 46.2 + /- 5.0 ) with slightly to moderately raised cardiovascular risk factors , were r and omized to 4 groups , diet ( D , n = 40 ) , exercise ( E , n = 39 ) , diet plus exercise ( DE , n = 39 ) , and no active intervention ( controls ( C , n = 39 ) ) , and investigated at baseline and after 6 months . BMI was significantly reduced in Groups E and DE ( mean difference and 95 % confidence intervals ( CI ) , -0.3 ( -0.5 , -0.01 ) and -0.6 ( -0.9 , -0.3 ) kg/m2 , respectively ) . Waist circumference was reduced in all 3 intervention groups ( D , E , and DE ) , -1.3 ( -2.5 , -0.1 ) , -2.2 ( -3.2 , -1.3 ) and -3.0 ( -3.9 , -2.0 ) cm , but not in the control group . Blood pressure ( BP ) was reduced in all 3 intervention groups , systolic BP 4 - 7 mmHg and diastolic BP 2 - 6 mmHg . Serum cholesterol was reduced in Group DE , -0.45 ( -0.77 , -0.13 ) mmol/l . VLDL-cholesterol was reduced in Groups E and DE , -0.14 ( -0.26 , -0.03 ) and -0.09 ( -0.18 , -0.01 ) mmol/l , whereas LDL-cholesterol was reduced in Groups D and DE -0.30 ( -0.54 , -0.06 ) and -0.35 ( -0.64 , -0.05 ) mmol/l . In contrast , neither HDL-cholesterol nor serum triglycerides were influenced by the interventions . According to the coronary risk profile derived from the Framingham study , all 3 intervention groups ( D , E , and DE ) significantly reduced their estimated 10-year risk ( -1 
    Output:
    
DATA SYNTHESIS Long-term observational follow-up of intensive sodium reduction counseling showed a decrease in the incidence of cardiovascular disease ; however , other direct evidence for reduction in disease morbidity is lacking .
Medium- and high-intensity counseling result ed in moderate to large changes in self-reported dietary and physical activity behaviors .
CONCLUSION Counseling to improve diet or increase physical activity changed health behaviors and was associated with small improvements in adiposity , blood pressure , and lipid levels .