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
- Donahue, PT, Schrack, JA, Thrul, J, Carlson, MC. Response to: Refining the clinical interpretation of activity variability in cognitive impairment: The need for phenotypic specificity. Alzheimers Dement (N Y) 2025; 11 (3): e70128. PubMed PMID:40589488 PubMed Central PMC12206944.
- Callow, DD, Yue, Y, Diallo, I, Rabinowitz, JA, An, Y, Alfini, AJ, Wu, MN, Wanigatunga, SK, Wanigatunga, AA, Ferrucci, L et al.. Associations of Accelerometer-Estimated Sleep with Cardiorespiratory Fitness and Energetic Efficiency among Middle-Aged and Older Adults. J Gerontol A Biol Sci Med Sci 2025; : . PubMed PMID:40577079 .
- Pomeroy, ML, Ornstein, KA, Schrack, JA, Cudjoe, TKM. Off the Grid: Reaching the Most Socially Isolated Among Us. J Am Geriatr Soc 2025; : . PubMed PMID:40530614 .
- Kulik, GL, Umbleja, T, Brown, TT, Ribaudo, HJ, Grinspoon, SK, Schrack, JA, Zanni, MV, Diggs, MR, Aberg, JA, Fichtenbaum, CJ et al.. Prognostic Factors of Physical Function Decline Among Middle-Aged Adults With HIV. Open Forum Infect Dis 2025; 12 (6): ofaf311. PubMed PMID:40519631 PubMed Central PMC12163370.
- Zhang, YS, Gross, AL, Dougherty, RJ, Kobayashi, LC, Schrack, JA, Freedman, VA. Co-calibration of cognitive performance in the National Health and Aging Trends Study with the Health and Retirement Study's Harmonized Cognitive Assessment Protocol: Implications for dementia classification. SSM Popul Health 2025; 30 : 101796. PubMed PMID:40474946 PubMed Central PMC12138453.
- Goman, AM, Tan, N, Pike, JR, Bessen, SY, Chen, ZS, Huang, AR, Arnold, ML, Burgard, S, Chisolm, TH, Couper, D et al.. Effects of hearing intervention on falls in older adults: findings from a secondary analysis of the ACHIEVE randomised controlled trial. Lancet Public Health 2025; 10 (6): e492-e502. PubMed PMID:40441816 PubMed Central PMC12203021.
- Twardzik, E, Desjardins, MR, Curriero, FC, Swenor, BK, Jackson, JW, Schrack, JA, Pollack Porter, KM. Inclusive Mobility: Dismantling transportation injustice at the intersection of race and disability. Disabil Health J 2025; : 101848. PubMed PMID:40379557 .
- Reed, NS, Chen, J, Huang, AR, Pike, JR, Arnold, M, Burgard, S, Chen, Z, Chisolm, T, Couper, D, Cudjoe, TKM et al.. Hearing Intervention, Social Isolation, and Loneliness: A Secondary Analysis of the ACHIEVE Randomized Clinical Trial. JAMA Intern Med 2025; : . PubMed PMID:40354063 PubMed Central PMC12070280.
- Cai, Y, Zhou, J, Scott, PW, Tian, Q, Wanigatunga, AA, Lipsitz, L, Simonsick, EM, Resnick, SM, Ferrucci, L, Ren, D et al.. Physical activity complexity, cognition, and risk of cognitive impairment and dementia in the Baltimore Longitudinal Study of Aging. Alzheimers Dement (N Y) 2025; 11 (2): e70077. PubMed PMID:40225241 PubMed Central PMC11982518.
- Donahue, PT, Schrack, JA, Thrul, J, Carlson, MC. Activity variability: A novel physical activity metric and its association with cognitive impairment. Alzheimers Dement (N Y) 2025; 11 (2): e70079. PubMed PMID:40225239 PubMed Central PMC11982928.
