Dr. Jennifer Schrack is Assistant Professor of Epidemiology at Johns Hopkins Bloomberg School of Public Health (JHSPH). Dr. Schrack holds a joint position with the Krieger School of Arts and Sciences, and she is affiliated with several Centers including the Center for AIDS Research, the Johns Hopkins Center on Aging and Health, the Multicenter AIDS Cohort Study, and the Welch Center for Prevention, Epidemiology and Clinical Research.
Dr. Schrack's primary area of research is the epidemiological assessment of physical activity and its associations with health and longevity in older populations. In collaboration with the SMART group from the JHSPH Department of Biostatistics, Dr. Schrack is working to establish methods to analyze and translate heart rate and accelerometry data into accurate and reliable measures of physical activity in older populations. In recognition of these efforts, Dr. Schrack was recently awarded a 2017 Johns Hopkins University Catalyst Award and a U01 from the National Institute on Aging.
Recent Publications
- Dougherty, RJ, Wang, J, Tian, Q, Simonsick, EM, Ferrucci, L, Schrack, JA. Rising energetic cost of walking predicts cognitive impairment. Alzheimers Dement 2026; 22 (2): e71193. PubMed PMID:41732800 PubMed Central PMC12930224.
- Freedman, VA, Schrack, JA. Revisiting socioeconomic disadvantage estimates in the National Health and Aging Trends Study. J Gerontol A Biol Sci Med Sci 2026; : . PubMed PMID:41692964 .
- Chamberlin, KW, Etzkorn, LH, Davoudi, A, Wang, W, Dougherty, RJ, Palta, P, Wanigatunga, AA, Windham, BG, Chen, LY, Spira, AP et al.. Interdaily variability of rest-activity patterns and risk of dementia in older adults: The ARIC Neurocognitive Study. Alzheimers Dement (N Y) 2026; 12 (1): e70219. PubMed PMID:41626291 PubMed Central PMC12854937.
- Beauchamp, MK, D'Amore, C, Raina, P, McIlroy, W, Adesina, N, Ahmadi, M, Alcock, L, Becker, C, Doherty, A, Donnelly, A et al.. Establishing global standards on wearable technology for measuring mobility in ageing populations: an international consensus exercise. Age Ageing 2026; 55 (1): . PubMed PMID:41563342 PubMed Central PMC12821365.
- Davoudi, A, Dougherty, RJ, Wanigatunga, AA, Agrawal, Y, Reed, NS, Ehrlich, JR, Gross, AL, Schrack, JA. Sensorimotor Impairment and Incident Dementia in the US Medicare Beneficiaries. J Am Geriatr Soc 2026; 74 (2): 458-469. PubMed PMID:41531144 PubMed Central PMC12911548.
- Sartini, J, Rooney, MR, Schrack, JA, McEvoy, JW, Ndumele, CE, Zeger, S, Selvin, E, Fang, M. Light Physical Activity and All-Cause Mortality in US Adults Across Cardiovascular-Kidney-Metabolic Syndrome Stages. J Am Heart Assoc 2026; 15 (3): e046271. PubMed PMID:41499165 .
- Hillsdon, M, Metcalf, B, Newton, JN, Wanigatunga, AA, Schrack, JA. Every move counts: but some more than others. Int J Behav Nutr Phys Act 2026; 23 (1): 10. PubMed PMID:41484632 PubMed Central PMC12865967.
- Freedman, VA, Schrack, JA. Drawing inferences about Medicare mortality from the National Health and Aging Trends Study: response to Gill et al. J Gerontol A Biol Sci Med Sci 2026; 81 (1): . PubMed PMID:41482502 PubMed Central PMC12758961.
- Yévenes-Briones, H, García-Morales, EE, Coco, L, Stickel, AM, Schrack, JA, Reed, NS, Martinez-Amezcua, P. Prevalence of Hearing Loss and Hearing Aid Use Among Hispanic Medicare Beneficiaries 65 Years and Older. JAMA Otolaryngol Head Neck Surg 2025; 152 (1): 65-70. PubMed PMID:41196606 PubMed Central PMC12593663.
- Liu, F, Schrack, JA, Walker, KA, Walston, J, Mathias, RA, Griswold, ME, Palta, P, Windham, BG, Jackson, JW. The effect of long-term adherence to physical activity recommendations in midlife on plasma proteins associated with frailty in the Atherosclerosis Risk in Communities (ARIC) study. Eur J Epidemiol 2026; 41 (1): 51-69. PubMed PMID:41144111 PubMed Central PMC12881102.
