The Emergence of Translational Epidemiology: From Scientific Discovery to Population Health Impact Structured exercise improves physical functioning in women with stages I and II breast cancer: results of a randomized controlled trial. Preoperative pulmonary rehabilitation in patients undergoing lung resection for non-small cell lung cancer. Effects of aerobic exercise on the physical performance and incidence of treatment-related complications after high-dose chemotherapy. Effects of aerobic and resistance exercise in breast cancer patients receiving adjuvant chemotherapy: a multicenter randomized controlled trial. Effect of aerobic exercise on body weight and composition in patients with breast cancer on adjuvant chemotherapy. Effects of Aerobic Interval Training on Cancer Patients' Functional Capacity Effects of physical activity on the fatigue and psychologic status of cancer patients during chemotherapy
Recent emphasis on translational research ( TR ) is highlighting the role of epidemiology in translating scientific discoveries into population health impact . The authors present applications of epidemiology in TR through 4 phases design ated T1–T4 , illustrated by examples from human genomics . In T1 , epidemiology explores the role of a basic scientific discovery ( e.g. , a disease risk factor or biomarker ) in developing a “ c and i date application ” for use in practice ( e.g. , a test used to guide interventions ) . In T2 , epidemiology can help to evaluate the efficacy of a c and i date application by using observational studies and r and omized controlled trials . In T3 , epidemiology can help to assess facilitators and barriers for uptake and implementation of c and i date applications in practice . In T4 , epidemiology can help to assess the impact of using c and i date applications on population health outcomes . Epidemiology also has a leading role in knowledge synthesis , especially using quantitative methods ( e.g. , meta- analysis ) . To explore the emergence of TR in epidemiology , the authors compared articles published in selected issues of the Journal in 1999 and 2009 . The proportion of articles identified as translational doubled from 16 % ( 11/69 ) in 1999 to 33 % ( 22/66 ) in 2009 ( P = 0.02 ) . Epidemiology is increasingly recognized as an important component of TR . By quantifying and integrating knowledge across disciplines , epidemiology provides crucial methods and tools for TR PURPOSE Self-directed and supervised exercise were compared with usual care in a clinical trial design ed to evaluate the effect of structured exercise on physical functioning and other dimensions of health-related quality of life in women with stages I and II breast cancer . PATIENTS AND METHODS One hundred twenty-three women with stages I and II breast cancer completed baseline evaluations of generic and disease- and site-specific health-related quality of life , aerobic capacity , and body weight . Participants were r and omly allocated to one of three intervention groups : usual care ( control group ) , self-directed exercise , or supervised exercise .  Quality of life , aerobic capacity , and body weight measures were repeated at 26 weeks . The primary outcome was the change in the Short Form-36 physical functioning scale between baseline and 26 weeks . RESULTS Physical functioning in the control group decreased by 4.1 points , whereas it increased by 5.7 points and 2.2 points in the self-directed and supervised exercise groups , respectively ( P = .04 ) . Post hoc analysis showed a moderately large ( and clinical ly important ) difference between the self-directed and control groups ( 9.8 points ; P = .01 ) and a more modest difference between the supervised and control groups ( 6.3 points ; P = .09 ) . No significant differences between groups were observed for changes in quality of life scores . In a secondary analysis of participants stratified by type of adjuvant therapy , supervised exercise improved aerobic capacity ( + 3.5 mL/kg/min ; P = .01 ) and reduced body weight ( -4.8 kg ; P < .05 ) compared with usual care only in participants not receiving chemotherapy . CONCLUSION Physical exercise can blunt some of the negative side effects of breast cancer treatment , including reduced physical functioning .  Self-directed exercise is an effective way to improve physical functioning compared with usual care . In participants not receiving chemotherapy  , supervised exercise may increase aerobic capacity and reduce body weight compared with usual care BACKGROUND The impact of short-term preoperative pulmonary rehabilitation on exercise capacity of patients with chronic obstructive pulmonary disease undergoing lobectomy for non-small cell lung cancer is evaluated . METHODS A prospect i ve observational study was design ed . Inclusion criteria consisted of an indication to lung resection because of a clinical stage I or II non-small cell lung cancer and a chronic obstructive disease on preoperative pulmonary function test . In such conditions , maximal oxygen consumption by a cardio-pulmonary exercise test was evaluated ; when this result ed as being < or = 15 ml/kg/min a pulmonary rehabilitation programme lasting 4 weeks was considered . Twelve patients fulfilled inclusion criteria , completed the preoperative rehabilitation programme and underwent a new functional evaluation prior to surgery . The postoperative record of these patients was collected . RESULTS On completion of pulmonary rehabilitation , the resting pulmonary function test and diffuse lung capacity of patients was unchanged , whereas the exercise performance was found to have significantly improved ; the mean increase in maximal oxygen consumption proved to be at 2.8 ml/kg/min ( p<0.01 ) . Eleven patients underwent lobectomy ; no postoperative mortality was noted and mean hospital stay was 17 days . Postoperative pulmonary complication was recorded in 8 patients . CONCLUSIONS Short-term preoperative pulmonary rehabilitation could improve the exercise capacity of patients with chronic obstructive pulmonary disease who are c and i date s for lung resection for non-small cell lung cancer Loss of physical performance is a universal problem of cancer patients undergoing chemotherapy .  We postulated that this impairment can be partially prevented by aerobic exercise . In a r and omized study , 33 cancer patients receiving high-dose chemotherapy followed by autologous peripheral blood stem cell transplantation ( training group , T ) performed an exercise program consisting of biking on an ergometer in the supine position after an interval-training pattern for 30 minutes daily during hospitalization . Patients in the  control group ( C , n = 37 )  did not train . Maximal physical performance was assessed with a treadmill test by admission and discharge . Physical performance of the two groups was not different on admission . The decrement in performance during hospitalization was 27 % greater in the control group than in the training group ( P = .05 ) ; this result ed in a significantly higher maximal physical performance at discharge in the trained patients ( P = .04 ) . Duration of neutropenia ( P = .01 ) and thrombopenia ( P = .06 ) , severity of diarrhea ( P = .04 ) , severity of pain ( P = .01 ) , and duration of hospitalization ( P = . 03 ) were reduced in the training group . We conclude that aerobic exercise can be safely carried out immediately after high-dose chemotherapy and can partially prevent loss of physical performance . Based on the potential significance of the observed outcomes , further studies are warranted to confirm our results PURPOSE Breast cancer chemotherapy  may cause unfavorable changes in physical functioning , body composition , psychosocial functioning , and quality of life ( QOL ) . We evaluated the relative merits of aerobic and resistance exercise in blunting these effects . PATIENTS AND METHODS We conducted a multicenter r and omized controlled trial in Canada between 2003 and 2005 that r and omly assigned 242 breast cancer patients initiating adjuvant chemotherapy to usual care ( n = 82 ) , supervised resistance exercise  ( n = 82 ) , or supervised aerobic exercise  ( n = 78 ) for the duration of their chemotherapy ( median , 17 weeks ; 95 % CI , 9 to 24 weeks ) . Our primary end point was cancer-specific QOL assessed by the Functional Assessment of Cancer Therapy-Anemia scale . Secondary end points were fatigue , psychosocial functioning , physical fitness , body composition , chemotherapy completion rate , and lymphedema . RESULTS The follow-up assessment rate for our primary end point was 92.1 % , and adherence to the supervised exercise was 70.2 % . Unadjusted and adjusted mixed-model analyses indicated that aerobic exercise was superior to usual care for improving self-esteem ( P = .015 ) , aerobic fitness ( P = .006 ) , and percent body fat ( adjusted P = .076 ) . Resistance exercise was superior to usual care for improving self-esteem ( P = .018 ) , muscular strength ( P < .001 ) , lean body mass ( P = .015 ) , and chemotherapy completion rate ( P = .033 ) . Changes in cancer-specific QOL , fatigue , depression , and anxiety favored the exercise groups but did not reach statistical significance . Exercise did not cause lymphedema or adverse events . CONCLUSION Neither aerobic nor resistance exercise significantly improved cancer-specific QOL  in breast cancer patients receiving chemotherapy , but they did improve self-esteem , physical fitness , body composition , and chemotherapy completion rate without causing lymphedema or significant adverse events This study examined the effect of a supervised , aerobic exercise program on change in body weight and composition ( multi-site subcutaneous skinfold measures , percent body fat , and lean body weight ) of women undergoing adjuvant chemotherapy for breast cancer . Stage II patients with breast cancer ( N = 24 ) were r and omized to an exercise treatment group ( EG , n = 12 ) and a control group ( CG , n = 12 ) . The EG participated in the individualized Winningham Aerobic Interval Training ( WAIT ) exercise program with exertional levels set at 60%-85 % of maximal heart rate for 20 - 30 minutes , 3 times per week , for 10 - 12 weeks . The CG received no exercise treatment , but were asked to continue with their daily activities . Subjects were asked to maintain their customary eating patterns throughout their participation . Data were analyzed using covariate analysis , adjusting for age and pre-test values . Comparisons of pre- and post-test results indicated that exercise had a moderating effect on gain in body fat and altered the subcutaneous body fat profile in both obese ( OB ) and nonobese ( NOB ) subjects . Exercising OB subjects showed a greater increase in lean body weight than NOB subjects , indicating an increase in muscle tissue . Results from this study may be useful in design ing safe and effective weight-control programs for patients with breast cancer on chemotherapy The effect of a 10-week aerobic interval-training cycle ergometer protocol on the functional capacity ( VO2Lmax ) of 45 women receiving chemotherapy for treatment of Stage II breast cancer was studied . Subjects were stratified by baseline functional capacity ( ± 1 MET ) and r and omized to experimental ( EX ) , placebo ( PL ) , and control ( CO ) groups . EX subjects completed a 10-week , 3 times/week exercise training program ; PL subjects participated in 10 weeks of nonaerobic stretching and flexibility exercises ; the CO group maintained normal activities . The EX group showed significant , p < .05 , improvement on pre- to posttest VO2Lmax as well as workload and test time compared to the PL and CO groups . The interval-training exercise intervention was effective in improving the functional capacity of Stage II breast cancer patients on adjuvant chemotherapy Fatigue is a common and often severe problem in cancer patients undergoing chemotherapy .  The authors postulated that physical activity training can reduce the intensity of fatigue in this group of patients
UNLABELLED Significant progress has been made in the field of exercise-oncology research over the past two decades .
As the field continues to forge ahead , it is time to reflect on past accomplishments in order to inform and define the critical unanswered questions postulated to have the largest impact on the field and on clinical care .
Against this background , we overview the extant literature base together with ongoing/planned studies examining the role of exercise therapy  following a cancer diagnosis with a view towards identifying major gaps in the knowledge .
METHOD We adapted the Physical Exercise Across the Cancer Experience ( PEACE ) organizational framework to systematic ally overview published as well as ongoing studies of exercise therapy across the cancer survivorship continuum [ i.e. 1 ) pretreatment ; 2 ) during treatment ; and 3 ) post-treatment ] .