{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T13:12:18Z","timestamp":1790773938184,"version":"4.1.0"},"reference-count":71,"publisher":"Oxford University Press (OUP)","issue":"10","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2012,10,1]]},"abstract":"<jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Although clinicians have a number of measures to use to describe walking performance, few, if any, of the measures capture a person's perceived effort in walking. Perceived effort of walking may be a factor in what a person does versus what he or she is able to do.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>The objective of this study was to examine the relationship of perceived effort of walking with gait, function, activity, fear of falling, and confidence in walking in older adults with mobility limitations.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Design<\/jats:title>\n                    <jats:p>This investigation was a cross-sectional, descriptive, relational study.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>The study took place at a clinical research training center. The participants were 50 older adults (mean age=76.8 years, SD=5.5) with mobility limitations. The measurements used were the Rating of Perceived Exertion (RPE) for walking; gait speed; the Modified Gait Abnormality Rating Scale; energy cost of walking; Late Life Function and Disability Instrument (LLFDI) for total, basic, and advanced lower-extremity function and for disability limitations; activity and restriction subscales of the Survey of Activities and Fear of Falling in the Elderly (SAFFE); activity counts; SAFFE fear subscale; and Gait Efficacy Scale (GES). The relationship of the RPE of walking with gait, function, activity, fear, and confidence was determined by using Spearman rank order coefficients and an analysis of variance (adjusted for age and sex) for mean differences between groups defined by no exertion during walking and some exertion during walking.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>The RPE was related to confidence in walking (GES, R=\u2212.326, P=.021) and activity (activity counts, R=.295, P=.044). The RPE groups (no exertion versus some exertion) differed in LLFDI scores for total (57.9 versus 53.2), basic (68.6 versus 61.4), and advanced (49.1 versus 42.6) lower-extremity function; LLFDI scores for disability limitations (74.9 versus 67.5); SAFFE fear subscale scores (0.346 versus 0.643); and GES scores (80.1 versus 67.8) (all P&amp;lt;.05).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Limitations<\/jats:title>\n                    <jats:p>The range of RPE scores for the participants studied was narrow. Thus, the real correlations between RPE and gait, physical function, and psychological aspects of walking may be greater than the relationships reported.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>The perceived effort of walking was associated with physical activity and confidence in walking. Reducing the perceived effort of walking may be an important target of interventions to slow the decline in function of older adults with mobility limitations.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.2522\/ptj.20110326","type":"journal-article","created":{"date-parts":[[2012,6,22]],"date-time":"2012-06-22T12:04:29Z","timestamp":1340366669000},"page":"1268-1277","source":"Crossref","is-referenced-by-count":58,"title":["Perceived Effort of Walking: Relationship With Gait, Physical Function and Activity, Fear of Falling, and Confidence in Walking in Older Adults With Mobility Limitations"],"prefix":"10.1093","volume":"92","author":[{"given":"Leslie M.","family":"Julius","sequence":"first","affiliation":[{"name":"L.M. Julius, PT, DPT, Department of Physical Therapy, University of Pittsburgh, Pittsburgh, Pennsylvania."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jennifer S.","family":"Brach","sequence":"additional","affiliation":[{"name":"J.S. Brach, PT, PhD, Department of Physical Therapy, University of Pittsburgh."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"David M.","family":"Wert","sequence":"additional","affiliation":[{"name":"D.M. Wert, PT, PhD, Department of Physical Therapy, University of Pittsburgh."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jessie M.","family":"VanSwearingen","sequence":"additional","affiliation":[{"name":"J.M. VanSwearingen, PT, PhD, FAPTA, Department of Physical Therapy, University of Pittsburgh, 6035 Forbes Tower, Pittsburgh, PA 15260 (USA)."}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","reference":[{"key":"2019123009375785100_B1","doi-asserted-by":"crossref","first-page":"100","DOI":"10.1007\/BF03324782","article-title":"Fatigue in older adults: an indicator of the aging process?","volume":"22","author":"Avlund","year":"2010","journal-title":"Aging Clin Exp Res."},{"key":"2019123009375785100_B2","doi-asserted-by":"crossref","first-page":"323","DOI":"10.1016\/S0895-4356(97)00296-5","article-title":"Tiredness in daily activities at age 70 as a predictor of mortality during the next 10 years","volume":"51","author":"Avlund","year":"1998","journal-title":"J Clin Epidemiol."},{"key":"2019123009375785100_B3","doi-asserted-by":"crossref","first-page":"579","DOI":"10.1093\/ageing\/afg101","article-title":"Onset of mobility disability among community dwelling older men and women: the role of tiredness in daily activities","volume":"32","author":"Avlund","year":"2003","journal-title":"Age Ageing."},{"key":"2019123009375785100_B4","doi-asserted-by":"crossref","first-page":"967","DOI":"10.1111\/j.1532-5415.2010.02811.x","article-title":"Bedside-to-bench conference: research agenda for idiopathic fatigue and aging","volume":"58","author":"Alexander","year":"2010","journal-title":"J Am Geriatr Soc."},{"key":"2019123009375785100_B5","article-title":"Effects of gender, weight, diet, and physical activity on energetic predictors of fatigue","author":"Ferrucci"},{"key":"2019123009375785100_B6","doi-asserted-by":"crossref","first-page":"S329","DOI":"10.1111\/j.1532-5415.2010.02913.x","article-title":"The energetic pathway to mobility loss: an emerging new framework for longitudinal studies on aging","volume":"58","author":"Schrack","year":"2010","journal-title":"J Am Geriatr Soc."},{"key":"2019123009375785100_B7","doi-asserted-by":"crossref","first-page":"1332","DOI":"10.1093\/gerona\/glq137","article-title":"Energetics of walking in elderly people: factors related to gait speed","volume":"65A","author":"Fiser","year":"2010","journal-title":"J Gerontol A Biol Sci Med Sci."},{"key":"2019123009375785100_B8","doi-asserted-by":"crossref","first-page":"M85","DOI":"10.1093\/geronj\/49.2.M85","article-title":"A short physical performance battery assessing lower extremity function: association with self-reported disability and prediction of mortality and nursing home admission","volume":"49","author":"Guralnik","year":"1994","journal-title":"J Gerontol."},{"key":"2019123009375785100_B9","doi-asserted-by":"crossref","first-page":"M217","DOI":"10.1093\/gerona\/57.4.M217","article-title":"Late Life Function and Disability Instrument, II: development and evaluation of the function component","volume":"57","author":"Haley","year":"2002","journal-title":"J Gerontol A Biol Sci Med Sci."},{"key":"2019123009375785100_B10","doi-asserted-by":"crossref","first-page":"977","DOI":"10.2522\/ptj.20090316","article-title":"Gait biomechanics, spatial and temporal characteristics, and the energy cost of walking in older adults with impaired mobility","volume":"90","author":"Wert","year":"2010","journal-title":"Phys Ther."},{"key":"2019123009375785100_B11","doi-asserted-by":"crossref","first-page":"407","DOI":"10.1249\/00003677-199700250-00017","article-title":"Perception of physical exertion: methods, mediators, and applications","volume":"25","author":"Robertson","year":"1997","journal-title":"Exerc Sport Sci Rev."},{"key":"2019123009375785100_B12","doi-asserted-by":"crossref","first-page":"92","DOI":"10.2340\/1650197719702239298","article-title":"Perceived exertion as an indicator of somatic stress","volume":"2","author":"Borg","year":"1970","journal-title":"Scand J Rehabil Med."},{"key":"2019123009375785100_B13","first-page":"90","article-title":"Perceived exertion: a note of \u201chistory\u201d and methods","volume":"5","author":"Borg","year":"2010","journal-title":"Med Sci Sports Exerc."},{"key":"2019123009375785100_B14","unstructured":"National Institutes of Health. Validity Studies: Validating PROMIS Instruments in Congestive Heart Failure Patients Receiving a Heart Transplant. PROMIS website. Available at: http:\/\/www.nihpromis.org\/documents\/Protocol_Summaries_CHF.pdf. Accessed March 7, 2011."},{"key":"2019123009375785100_B15","doi-asserted-by":"crossref","first-page":"1618","DOI":"10.1111\/j.1532-5415.2000.tb03873.x","article-title":"Subsystems contributing to the decline in ability to walk: bridging the gap between epidemiology and geriatric practice in the InCHIANTI study","volume":"48","author":"Ferrucci","year":"2000","journal-title":"J Am Geriatr Soc."},{"key":"2019123009375785100_B16","doi-asserted-by":"crossref","first-page":"1463","DOI":"10.1046\/j.1532-5415.2001.4911238.x","article-title":"Progressive versus catastrophic loss of the ability to walk: implications for the prevention of mobility loss","volume":"49","author":"Guralnik","year":"2001","journal-title":"J Am Geriatr Soc."},{"key":"2019123009375785100_B17","doi-asserted-by":"crossref","first-page":"84","DOI":"10.1097\/00002060-199304000-00005","article-title":"Performance profiles of the Functional Independence Measure","volume":"72","author":"Granger","year":"1993","journal-title":"Am J Phys Med Rehabil."},{"key":"2019123009375785100_B18","first-page":"12","article-title":"Functional community ambulation: what are your criteria?","volume":"6","author":"Lerner-Frankiel","year":"1986","journal-title":"Clinical Management."},{"key":"2019123009375785100_B19","doi-asserted-by":"crossref","first-page":"672","DOI":"10.1111\/j.1532-5415.1999.tb01588.x","article-title":"Who walks? Factors associated with walking behavior in disabled older women with and without self-reported walking difficulty","volume":"47","author":"Simonsick","year":"1999","journal-title":"J Am Geriatr Soc."},{"key":"2019123009375785100_B20","doi-asserted-by":"crossref","first-page":"1190","DOI":"10.1093\/gerona\/glp098","article-title":"A randomized trial of two forms of therapeutic activity to improve walking: effect on the energy cost of walking","volume":"64","author":"VanSwearingen","year":"2009","journal-title":"J Gerontol A Biol Sci Med Sci."},{"key":"2019123009375785100_B21","doi-asserted-by":"crossref","first-page":"189","DOI":"10.1016\/0022-3956(75)90026-6","article-title":"\u201cMini-mental state\u201d: a practical method for grading the cognitive state of patients for the clinician","volume":"12","author":"Folstein","year":"1975","journal-title":"J Psychiatr Res."},{"key":"2019123009375785100_B22","doi-asserted-by":"crossref","first-page":"314","DOI":"10.1046\/j.1532-5415.2003.51104.x","article-title":"Physical performance measures in the clinical setting","volume":"51","author":"Studenski","year":"2003","journal-title":"J Am Geriatr Soc."},{"key":"2019123009375785100_B23","doi-asserted-by":"crossref","first-page":"313","DOI":"10.1111\/j.1532-5415.1997.tb00946.x","article-title":"Gait changes in older adults: predictors of falls or indicators of fear?","volume":"45","author":"Maki","year":"1997","journal-title":"J Am Geriatr Soc."},{"key":"2019123009375785100_B24","doi-asserted-by":"crossref","first-page":"21","DOI":"10.1186\/1743-0003-2-21","article-title":"Too much or too little step width variability is associated with a fall history in older persons who walk at or near normal gait speed","volume":"2","author":"Brach","year":"2005","journal-title":"J Neuroeng Rehabil."},{"key":"2019123009375785100_B25","doi-asserted-by":"crossref","first-page":"428","DOI":"10.1191\/0269215502cr515oa","article-title":"Comorbidity adjustments for functional outcomes in community-dwelling older adults","volume":"16","author":"Rigler","year":"2002","journal-title":"Clin Rehabil."},{"key":"2019123009375785100_B26","first-page":"1","article-title":"Perceived exertion research in the 21st century: developments, reflections and questions for the future","volume":"6","author":"Faulkner","year":"2008","journal-title":"J Exerc Sci Fit."},{"key":"2019123009375785100_B27","doi-asserted-by":"crossref","first-page":"212","DOI":"10.3138\/ptc.58.3.212","article-title":"Reliability of four functional tests and rating of perceived exertion in persons with multiple sclerosis","volume":"58","author":"Fry","year":"2006","journal-title":"Physiother Can."},{"key":"2019123009375785100_B28","first-page":"125","article-title":"Foot fall measurement technology","volume-title":"Gait Analysis: Theory and Application","author":"Walsh","year":"1995"},{"key":"2019123009375785100_B29","doi-asserted-by":"crossref","first-page":"2293","DOI":"10.1016\/j.apmr.2008.06.010","article-title":"Reliability and validity of measures of gait variability in community-dwelling older adults","volume":"89","author":"Brach","year":"2008","journal-title":"Arch Phys Med Rehabil."},{"key":"2019123009375785100_B30","doi-asserted-by":"crossref","first-page":"1646","DOI":"10.1111\/j.1532-5415.2001.49274.x","article-title":"Gait variability in community-dwelling older adults","volume":"49","author":"Brach","year":"2001","journal-title":"J Am Geriatr Soc."},{"key":"2019123009375785100_B31","doi-asserted-by":"crossref","first-page":"431","DOI":"10.1016\/j.gaitpost.2007.05.016","article-title":"Stance time and step width variability have unique contributing impairments in older persons","volume":"27","author":"Brach","year":"2008","journal-title":"Gait Posture."},{"key":"2019123009375785100_B32","doi-asserted-by":"crossref","first-page":"147","DOI":"10.1093\/ageing\/10.3.147","article-title":"Studies of gait and mobility in the elderly","volume":"10","author":"Imms","year":"1981","journal-title":"Age Ageing."},{"key":"2019123009375785100_B33","doi-asserted-by":"crossref","first-page":"556","DOI":"10.1056\/NEJM199503023320902","article-title":"Lower extremity function in persons over the age of 70 years as a predictor of subsequent disability","volume":"332","author":"Guralnik","year":"1995","journal-title":"N Engl J Med."},{"key":"2019123009375785100_B34","doi-asserted-by":"crossref","first-page":"M221","DOI":"10.1093\/gerona\/55.4.M221","article-title":"Lower extremity function and subsequent disability: consistency across studies, predictive models, and value of gait speed alone compared with the Short Physical Performance Battery","volume":"55","author":"Guralnik","year":"2000","journal-title":"J Gerontol A Biol Sci Med Sci."},{"key":"2019123009375785100_B35","doi-asserted-by":"crossref","first-page":"50","DOI":"10.1001\/jama.2010.1923","article-title":"Gait speed and survival in older adults","volume":"305","author":"Studenski","year":"2011","journal-title":"JAMA."},{"key":"2019123009375785100_B36","doi-asserted-by":"crossref","first-page":"743","DOI":"10.1111\/j.1532-5415.2006.00701.x","article-title":"Meaningful change and responsiveness in common physical performance measures in older adults","volume":"54","author":"Perera","year":"2006","journal-title":"J Am Geriatr Soc."},{"key":"2019123009375785100_B37","doi-asserted-by":"crossref","first-page":"994","DOI":"10.1093\/ptj\/76.9.994","article-title":"The Modified Gait Abnormality Rating Scale for recognizing the risk of recurrent falls in community-dwelling elderly adults","volume":"76","author":"VanSwearingen","year":"1996","journal-title":"Phys Ther."},{"key":"2019123009375785100_B38","doi-asserted-by":"crossref","first-page":"M457","DOI":"10.1093\/gerona\/53A.6.M457","article-title":"Assessing recurrent fall risk of community-dwelling, frail older veterans using specific tests of mobility and the Physical Performance Test of function","volume":"53","author":"VanSwearingen","year":"1998","journal-title":"J Gerontol A Biol Sci Med Sci."},{"key":"2019123009375785100_B39","doi-asserted-by":"crossref","first-page":"676","DOI":"10.1017\/S0012162299001395","article-title":"High- or low-technology measurements of energy expenditure in clinical gait analysis?","volume":"41","author":"Boyd","year":"1999","journal-title":"Dev Med Child Neurol."},{"key":"2019123009375785100_B40","volume-title":"Exercise Physiology: Energy, Nutrition, and Human Performance","author":"McArdle","year":"2001","edition":"5th ed"},{"key":"2019123009375785100_B41","doi-asserted-by":"crossref","first-page":"1245","DOI":"10.2106\/00004623-198567080-00016","article-title":"Energy cost of paraplegic ambulation","volume":"67","author":"Waters","year":"1985","journal-title":"J Bone Joint Surg."},{"key":"2019123009375785100_B42","first-page":"443","article-title":"Energy expenditure","volume-title":"Gait Analysis: Normal and Pathologic Function","author":"Waters","year":"2004"},{"key":"2019123009375785100_B43","doi-asserted-by":"crossref","first-page":"149","DOI":"10.1016\/S1050-6411(98)00046-7","article-title":"Cost of walking and locomotor impairment","volume":"9","author":"Bernardi","year":"1999","journal-title":"J Electromyogr Kinesiol."},{"key":"2019123009375785100_B44","first-page":"85","article-title":"External work of walking in hemiparetic patients","volume":"3","author":"Gersten","year":"1971","journal-title":"Scand J Rehabil Med."},{"key":"2019123009375785100_B45","doi-asserted-by":"crossref","first-page":"326","DOI":"10.1161\/01.STR.28.2.326","article-title":"Treadmill aerobic exercise training reduces the energy expenditure and cardiovascular demands of hemiparetic gait in chronic stroke patients: a preliminary report","volume":"28","author":"Macko","year":"1997","journal-title":"Stroke."},{"key":"2019123009375785100_B46","doi-asserted-by":"crossref","first-page":"879","DOI":"10.1053\/apmr.2001.23853","article-title":"Treadmill training improves fitness reserve in chronic stroke patients","volume":"82","author":"Macko","year":"2001","journal-title":"Arch Phys Med Rehabil."},{"key":"2019123009375785100_B47","doi-asserted-by":"crossref","first-page":"1032","DOI":"10.2106\/00004623-198870070-00011","article-title":"Comparable energy expenditure following arthrodesis of the hip and ankle","volume":"70","author":"Waters","year":"1988","journal-title":"J Bone Joint Surg Am."},{"key":"2019123009375785100_B48","doi-asserted-by":"crossref","first-page":"1017","DOI":"10.1016\/S0003-9993(99)90054-0","article-title":"Validity and reproducibility of crutch force and heart rate measurements to assess energy expenditure of paraplegic gait","volume":"80","author":"Ijzerman","year":"1999","journal-title":"Arch Phys Med Rehabil."},{"key":"2019123009375785100_B49","doi-asserted-by":"crossref","first-page":"1266","DOI":"10.1053\/apmr.2002.34598","article-title":"A new method of using heart rate to represent energy expenditure: the Total Heart Beat Index","volume":"83","author":"Hood","year":"2002","journal-title":"Arch Phys Med Rehabil."},{"key":"2019123009375785100_B50","first-page":"29","article-title":"The objective measurement of physical performance with long term ambulatory physiological surveillance equipment (LAPSE)","volume-title":"ISAM 1979: Proceedings of the Third International Symposium on Ambulatory Monitoring","author":"MacGregor","year":"1980"},{"key":"2019123009375785100_B51","doi-asserted-by":"crossref","first-page":"M209","DOI":"10.1093\/gerona\/57.4.M209","article-title":"Late Life Function and Disability Instrument, I: development and evaluation of the disability component","volume":"57","author":"Jette","year":"2002","journal-title":"J Gerontol A Biol Sci Med Sci."},{"key":"2019123009375785100_B52","volume-title":"International Classification of Functioning, Disability and Health: ICF","year":"2001"},{"key":"2019123009375785100_B53","doi-asserted-by":"crossref","first-page":"145","DOI":"10.1080\/16501970310010501","article-title":"Are the ICF activity and participation dimensions distinct?","volume":"35","author":"Jette","year":"2003","journal-title":"J Rehabil Med."},{"key":"2019123009375785100_B54","doi-asserted-by":"crossref","first-page":"P43","DOI":"10.1093\/geronb\/53B.1.P43","article-title":"Fear of falling and activity restriction: the Survey of Activities and Fear of Falling in the Elderly (SAFE)","volume":"53","author":"Lachman","year":"1998","journal-title":"J Gerontol B Psychol Sci Soc Sci."},{"key":"2019123009375785100_B55","doi-asserted-by":"crossref","first-page":"S450","DOI":"10.1097\/00005768-200009001-00003","article-title":"Estimation of energy expenditure using CSA accelerometers at hip and wrist sites","volume":"32","author":"Schwartz","year":"2000","journal-title":"Med Sci Sports Exerc."},{"key":"2019123009375785100_B56","first-page":"1637","article-title":"Reliability of accelerometry-based activity monitors: a generalizability study","volume":"36","author":"Welk","year":"2004","journal-title":"Med Sci Sports Exerc."},{"key":"2019123009375785100_B57","doi-asserted-by":"crossref","first-page":"1071","DOI":"10.1097\/00005768-199608000-00019","article-title":"Accuracy of five electronic pedometers for measuring distance walked","volume":"28","author":"Bassett","year":"1996","journal-title":"Med Sci Sports Exerc."},{"key":"2019123009375785100_B58","doi-asserted-by":"crossref","first-page":"934","DOI":"10.1249\/00005768-199506000-00021","article-title":"Validity of the Computer Science and Applications, Inc. (CSA) activity monitor","volume":"27","author":"Melanson","year":"1995","journal-title":"Med Sci Sports Exerc."},{"key":"2019123009375785100_B59","doi-asserted-by":"crossref","first-page":"36","DOI":"10.1080\/02701367.2000.10608878","article-title":"Assessment of physical activity with the Computer Science and Applications, Inc., accelerometer: laboratory versus field validation","volume":"71","author":"Nichols","year":"2000","journal-title":"Res Q Exerc Sport."},{"key":"2019123009375785100_B60","doi-asserted-by":"crossref","first-page":"89","DOI":"10.2522\/ptj.20080121","article-title":"Walking skill can be assessed in older adults: validity of Figure-of-8 Walk Test","volume":"90","author":"Hess","year":"2010","journal-title":"Phys Ther."},{"key":"2019123009375785100_B61","doi-asserted-by":"crossref","first-page":"318","DOI":"10.2522\/ptj.20110053","article-title":"The Modified Gait Efficacy Scale: establishing the psychometric properties in older adults","volume":"92","author":"Newell","year":"2012","journal-title":"Phys Ther."},{"key":"2019123009375785100_B62","doi-asserted-by":"crossref","first-page":"299","DOI":"10.1093\/gerona\/55.5.M299","article-title":"Prospective study of the impact of fear of falling on activities of daily living, SF-36 scores, and nursing home admission","volume":"55","author":"Cumming","year":"2000","journal-title":"J Gerontol A Biol Sci Med Sci."},{"key":"2019123009375785100_B63","doi-asserted-by":"crossref","first-page":"1329","DOI":"10.1046\/j.1532-5415.2002.50352.x","article-title":"Falls and fear of falling: which comes first? A longitudinal prediction model suggests strategies for primary and secondary prevention","volume":"50","author":"Friedman","year":"2002","journal-title":"J Am Geriatr Soc."},{"key":"2019123009375785100_B64","doi-asserted-by":"crossref","first-page":"P270","DOI":"10.1093\/geronb\/61.5.P270","article-title":"Physical activity and functional limitations in older women: influence of self-efficacy","volume":"61","author":"McAuley","year":"2006","journal-title":"J Gerontol B Psychol Sci Soc Sci."},{"key":"2019123009375785100_B65","doi-asserted-by":"crossref","first-page":"1967","DOI":"10.1111\/j.1532-5415.2007.01469.x","article-title":"Effects of change in physical activity on physical function limitations in older women: mediating roles of physical function performance and self-efficacy","volume":"55","author":"McAuley","year":"2007","journal-title":"J Am Geriatr Soc."},{"key":"2019123009375785100_B66","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1371\/journal.pone.0011090","article-title":"Metabolic state alters economic decision making under risk in humans","volume":"5","author":"Symmonds","year":"2010","journal-title":"PLoS ONE."},{"key":"2019123009375785100_B67","doi-asserted-by":"crossref","first-page":"320","DOI":"10.1093\/ptj\/82.4.320","article-title":"Identifying early decline of physical function in community-dwelling older adults: performance-based and self-report measures","volume":"82","author":"Brach","year":"2002","journal-title":"Phys Ther."},{"key":"2019123009375785100_B68","doi-asserted-by":"crossref","first-page":"1127","DOI":"10.2105\/AJPH.81.9.1127","article-title":"Comparison of subjective ratings of function with observed functional ability of frail older persons","volume":"81","author":"Elam","year":"1991","journal-title":"Am J Public Health."},{"key":"2019123009375785100_B69","doi-asserted-by":"crossref","first-page":"841","DOI":"10.2105\/AJPH.82.6.841","article-title":"Functional limitations and disability among elders in the Framingham Study","volume":"82","author":"Kelly-Hayes","year":"1992","journal-title":"Am J Public Health."},{"key":"2019123009375785100_B70","doi-asserted-by":"crossref","first-page":"454","DOI":"10.1152\/japplphysiol.00976.2009a","article-title":"Counterpoint: afferent feedback from fatigued locomotor muscles is not an important determinant of endurance exercise performance","volume":"108","author":"Marcora","year":"2010","journal-title":"J Appl Physiol."},{"key":"2019123009375785100_B71","doi-asserted-by":"crossref","first-page":"911","DOI":"10.2165\/00007256-200636110-00001","article-title":"Perceived exertion: influence of age and cognitive development","volume":"36","author":"Groslambert","year":"2006","journal-title":"Sports Med."}],"container-title":["Physical Therapy"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/academic.oup.com\/ptj\/article-pdf\/92\/10\/1268\/31637783\/ptj1268.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"syndication"},{"URL":"http:\/\/academic.oup.com\/ptj\/article-pdf\/92\/10\/1268\/31637783\/ptj1268.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2024,4,25]],"date-time":"2024-04-25T20:10:36Z","timestamp":1714075836000},"score":1,"resource":{"primary":{"URL":"https:\/\/academic.oup.com\/ptj\/article\/92\/10\/1268\/2735112"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2012,10,1]]},"references-count":71,"journal-issue":{"issue":"10","published-print":{"date-parts":[[2012,10,1]]}},"URL":"https:\/\/doi.org\/10.2522\/ptj.20110326","relation":{},"ISSN":["0031-9023","1538-6724"],"issn-type":[{"value":"0031-9023","type":"print"},{"value":"1538-6724","type":"electronic"}],"subject":[],"published":{"date-parts":[[2012,10,1]]}}}