***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: BACKGROUND Cardiovascular disease ( CVD ) mortality rates are greatly elevated in chronic kidney disease patients receiving maintenance haemodialysis therapy . The purpose of this study was to evaluate the efficacy of intradialytic endurance exercise training on novel risk factors that may contribute to this excessive CVD risk . METHODS Seventeen haemodialysis patients were r and omized to either an intradialytic exercise training ( cycling ) group ( EX ; n = 8) or a non-exercising control group ( CON ; n = 9 ) for 4 months . At baseline and following the intervention , we measured serum parameters related to CVD risk and renal function , used echocardiography to measure variables related to cardiac structure and function and assessed physical performance by a vali date d shuttle walk test . RESULTS Performance on the shuttle walk test increased by 17 % in EX ( P < 0.05 ) , but did not change in CON . There was no change in serum lipids or inflammatory markers ( C-reactive protein , interleukin-6 ) in either group . Serum thiobarbituric acid reactive substances , a marker of oxidative stress , were reduced by 38 % in EX ( P < 0.05 ) , but did not change in CON . In addition , serum alkaline phosphatase ( ALP ) , a putative risk factor for vascular calcification , was reduced by 27 % in EX ( P < 0.05 ) , but did not change in CON . There was no change in left atrial volume , left ventricular mass or myocardial performance index in either group . However , the thickness of the epicardial fat layer was reduced by 11 % in EX ( P < 0.05 ) , but did not change in CON . Furthermore , the change in physical performance was inversely correlated to the change in epicardial fat ( r = -0.63 ; P = 0.03 ) . CONCLUSIONS These results suggest that endurance exercise training may improve CVD risk in haemodialysis patients by decreasing novel risk factors including serum oxidative stress , ALP and epicardial fat BACKGROUND Sedentary behavior is associated with an increased risk for death in the general population . However , the association between inactivity and mortality has not been studied in a large cohort of dialysis patients despite the high prevalence of sedentary behavior in this group . METHODS We used the Dialysis Morbidity and Mortality Study Wave 2 , a prospect i ve study of a national sample of 4,024 incident peritoneal dialysis and hemodialysis patients from 1996 to 1997 , to determine whether sedentary behavior is associated with increased mortality during a 1-year period in this group after adjusting for confounding variables . RESULTS The study population consisted of the 2,837 patients with accurate survival data who were able to ambulate and transfer . Eleven percent of the sedentary patients died during the study period compared with 5 % of nonsedentary patients . In a survival analysis , sedentary behavior ( hazard ratio , 1.62 ; 95 % confidence interval , 1.16 to 2.27 ) was associated with an increased risk for death at 1 year after adjusting for all variables that we postulated might be associated with survival and for differences between sedentary and nonsedentary patients . CONCLUSION Sedentary behavior is associated with an increased risk for mortality among dialysis patients similar in magnitude to that of other well-established risk factors , such as a one-point reduction in serum albumin concentration . More attention should be given to exercise behavior in dialysis patients , and controlled clinical trials are needed to further define the association of sedentary behavior with mortality The aim of the review was to assess the effect of patient education in ischaemic heart disease . Thirteen r and omised controlled trials of moderate to good quality including 68,556 patients were selected . The effect on mortality , cardiac morbidity , hospitalisation and health-related quality of life was assessed and only non-significant tendencies of effect were found . The authors of the review nevertheless conclude that the review supports current rehabilitation programmes that include patient education . Further research in patient education , especially concerning the most effective methods of education delivery , is needed BACKGROUND AND OBJECTIVES Reduced muscle mass and strength are prevalent conditions in dialysis patients . However , muscle strength and muscle mass are not congruent ; muscle strength can diminish even though muscle mass is maintained or increased . This study addresses phenotype and mortality associations of these muscle dysfunction entities alone or in combination ( i.e. , concurrent loss of muscle mass and strength/mobility , here defined as sarcopenia ) . DESIGN , SETTING , PARTICIPANTS , & MEASUREMENTS This study included 330 incident dialysis patients ( 203 men , mean age 53±13 years , and mean GFR 7±2 ml/min per 1.73 m(2 ) ) recruited between 1994 and 2010 and followed prospect ively for up to 5 years . Low muscle mass ( by dual-energy x-ray absorptiometry appendicular mass index ) and low muscle strength ( by h and grip ) were defined against young reference population s according to the European Working Group on Sarcopenia in Older People . RESULTS Whereas 20 % of patients had sarcopenia , low muscle mass and low muscle strength alone were observed in a further 24 % and 15 % of patients , respectively . Old age , comorbidities , protein-energy wasting , physical inactivity , low albumin , and inflammation associated with low muscle strength , but not with low muscle mass ( multivariate ANOVA interactions ) . During follow-up , 95 patients ( 29 % ) died and both conditions associated with mortality as separate entities . When combined , individuals with low muscle mass alone were not at increased risk of mortality ( adjusted hazard ratio [ HR ] , 1.23 ; 95 % confidence interval [ 95 % CI ] , 0.56 to 2.67 ) . Individuals with low muscle strength were at increased risk , irrespective of their muscle stores being appropriate ( HR , 1.98 ; 95 % CI , 1.01 to 3.87 ) or low ( HR , 1.93 ; 95 % CI , 1.01 to 3.71 ) . CONCLUSIONS Low muscle strength was more strongly associated with aging , protein-energy wasting , physical inactivity , inflammation , and mortality than low muscle mass . Assessment of muscle functionality may provide additional diagnostic and prognostic information to muscle-mass evaluation BACKGROUND Individuals on hemodialysis have low physical function and activity levels . Clinical trials have shown improvements in these parameters with exercise programming . Pedometers have not been extensively evaluated in individuals on hemodialysis . This r and omized clinical trial compared the effects of intradialytic cycling versus a pedometer program on physical function , physical activity and quality of life . METHODS Sixty patients were r and omly assigned to two study groups . The ergometer group cycled during each hemodialysis session for 24 weeks . Pedometer participants followed a home-based walking program for 24 weeks . The primary outcome was aerobic capacity [ VO2peak and 6-minute walk ( 6MW ) test ] . Secondary outcomes included lower extremity strength [ sit-to-st and ( SS ) test ] , flexibility [ sit- and -reach ( SR ) test ] , physical activity ( accelerometer ) and health-related quality of life . Measurements were collected at baseline and at 12 and 24 weeks . RESULTS At 12 and 24 weeks , there was no significant change in the VO2peak or 6MW test between or within study groups . SS testing in the ergometer group improved from 10.2 ( SD 3.4 ) to 11.4 ( SD 2.5 ) cycles from baseline to 24 weeks ( P < 0.005 ) . Similarly , in the pedometer group , SS cycles improved from 10.1 ( SD 3.3 ) to 12.2 ( SD 3.5 ) ( P < 0.005 ) . The SR test also significantly improved over time in both the study groups . No significant changes were noted for other secondary outcomes . CONCLUSIONS Both intradialytic cycling and pedometer programming improved aspects of physical function . Neither intervention had a significant effect on aerobic capacity . No significant differences in any outcomes were identified between interventions groups Introduction Despite guidance and evidence for the beneficial effects of intradialytic exercise ( IDE ) , such programmes are rarely adopted within practice and little is known about how they may best be sustained . The Theoretical Domains Framework ( TDF ) was used to guide the underst and ing of the barriers and facilitators to initial and ongoing IDE participation and to underst and how these are influential at each stage . Material s and Methods Focus groups explored patient ( n=24 ) and staff ( n=9 ) perceptions of IDE prior to the introduction of a programme and , six months later , face to face semi-structured interviews captured exercising patients ( n=11 ) and staffs ’ ( n=8 ) actual experiences . Data were collected at private and NHS haemodialysis units within the UK . All data were audio-recorded , translated where necessary , transcribed verbatim and subject to framework analysis . Results IDE initiation can be facilitated by addressing the pre-existing beliefs about IDE through the influence of peers ( for patients ) and training ( for staff ) . Participation was sustained through the observation of positive outcomes and through social influences such as teamwork and collaboration . Despite this , environment and re source limitations remained the greatest barrier perceived by both groups . Conclusions Novel methods of staff training and patient education should enhance engagement . Programmes that clearly highlight the benefits of IDE should be more successful in the longer term . The barrier of staff workload needs to be addressed through specific guidance that includes recommendations on staffing levels , roles , training and skill mix OBJECTIVES The purpose of this study is to determine whether a low-to-moderate intensity pre-conditioning exercise programme linked with exercise counselling could improve behavioural change , physical fitness , physiological condition and health-related quality of life of sedentary haemodialysis patients in The Netherl and s. METHODS Ninety-six haemodialysis patients of the Groningen Dialysis Center were r and omized into an exercise group ( n = 53 ) and a control group ( n = 43 ) . The exercise programme consists of cycling during dialysis together with a pre-dialysis strength training programme lasting 12 weeks . The intensity of the exercise programme is condition level 12 - 16 according to the rate of perceived exertion ( RPE ) . Motivational interviewing techniques were used for exercise counselling . Before and after the intervention , both groups were tested on behavioural change and physical fitness components such as reaction time , manual dexterity , lower extremity muscle strength and VO2 peak . Physiological conditions such as weight , blood pressure , haemoglobin and haematocrit values , cholesterol and Kt/V were obtained from the medical records . Health-related quality of life assessment included R AND -36 scores , symptoms and depression . RESULTS A group x time analysis with MANOVA ( repeated measures ) demonstrates that participation in a low-to-moderate intensity exercise programme linked with exercise counselling yields a significant increase in behavioural change , reaction time , lower extremity muscle strength , Kt/V and three components of quality of life , and no significant effects in the control group . CONCLUSION Participating in a low-to-moderate intensity pre-conditioning exercise programme showed beneficial effects on behavioural change , physical fitness , physiological conditions and health-related quality of life INTRODUCTION We aim ed determine the impact of an 8-week intradialytic exercise program , consisting of 15 minutes of cumulative duration low-intensity exercise during the first 2 hours of dialysis on serum electrolytes levels and hemoglobin . MATERIAL S AND METHODS In a r and omized controlled trial of in an outpatient hemodialysis unit , clinical ly stable hemodialysis patients ( n = 47 ) were included and assigned into the aerobic exercise group ( n = 25 ) and the control group ( n = 23 ) . Aerobic exercises were done in groups , 15 min/d , 3 times a week , for 2 months . The main outcome measures were biochemical variables including serum levels of calcium , phosphate , and potassium levels and hemoglobin level . RESULTS After an 8-week intervention , significant improvements were seen in serum phosphate levels ( decreased by 1.84 mg/dL ) and serum potassium levels ( decreased by 0.69 mg/dL ) . No side-effects were observed . Serum calcium and hemoglobin levels did not change significantly in the exercise group . CONCLUSIONS A simplified aerobic exercise program is a complementary , safe , and effective clinical treatment modality in patients with end-stage renal disease on dialysis Rational : Patients under regular dialysis can also present alterations in the cardiovascular , musculoskeletal , and metabolic systems . Objectives : The aim of this study is to compare the effects of strength and aerobic exercises performed during  hemodialysis ( HD ) in individuals with chronic renal disease . Material s and Methods : R and omized clinical trial . It was developed as a program of exercises three times a week , in the first 2 h of HD for 8 weeks . The patients were divided into three groups : control ( Group 1 , n : 11 ) , strength ( Group 2 , n : 11 ) , and aerobic ( Group 3 , n : 10 ) . G1 has not developed any type of physical training ; G2 utilized a training load of 40 % of one repetition maximum ( 1RM ) with anklets , and developed three series of 15 repetitions . G3 pedaled seated in the dialysis seat , during 20 min , in an ergometric bicycle , with intensity regulated by the perceived effort scale . Before and after 8 weeks , the following variables were evaluated : respiratory muscular strength , pulmonary function , functional capacity , blood biochemistry , and quality of life . Main Findings : In the pre- and 
    Output:
    
Aerobic IDE had a significant positive effect on the QOL physical component score ( QOL-PSC ) and on mental component score ( QOL-MCS ) of SF36 , but not on serum phosphorus or Kt/V. Conclusions IDE incorporation into clinical practice has a significant positive effect on QOL-PSC and QOL-MCS .
In the review ed studies , IDE did not result in any health hazard in hemodialysis patients .