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
- Hunzinger, KJ, Skow, L, Schneider, ALC, Griswold, ME, Zhu, X, Ali, F, Lutsey, PL, Schrack, JA, Ferrucci, L, Simonsick, EM et al.. Gait characteristics in older adults using the ProtoKinetics Zeno walkway: the atherosclerosis risk in communities (ARIC) study. Front Aging Neurosci 2026; 18 : 1901340. PubMed PMID:42787172 PubMed Central PMC13601270.
- Chamberlin, KW, Etzkorn, LH, Spira, AP, Jiang, K, Chen, LY, Crainiceanu, C, Zipunnikov, V, Schrack, JA. Novel sleep metrics derived from chest-worn accelerometers are associated with dementia risk: the Atherosclerosis Risk in Communities neurocognitive study. Sleep Adv 2026; 7 (3): zpag093. PubMed PMID:42761777 PubMed Central PMC13587100.
- Pike, JR, Huang, AR, Reed, N, Arnold, ML, Chisolm, TH, Couper, D, Deal, JA, Faucette, S, Goman, AM, Gottesman, RF et al.. Effects of hearing intervention on blood-based biomarkers of neuroinflammation and neurodegeneration: a secondary analysis of the ACHIEVE randomised controlled trial. EClinicalMedicine 2026; 99 : 104164. PubMed PMID:42733779 PubMed Central PMC13571546.
- Chen, D, Rabinowitz, JA, Wu, F, Wei, Z, An, Y, Schrack, JA, Tanaka, T, Chia, CW, Wu, MN, Wanigatunga, SK et al.. Association of Vitamin D and B12 Levels with Actigraphic Sleep in Cognitively Unimpaired Middle-Aged and Older Adults. J Gerontol A Biol Sci Med Sci 2026; : . PubMed PMID:42696426 PubMed Central PMC13577193.
- Klamm, MM, Gabriel, KP, Sung, JH, Yan, Y, Duck, A, Schrack, JA, Spira, AP, Stosor, V, Detels, R, Patel, SR et al.. Exploring the Interplay of Movement Dispersion, Sleep, and Quality of Life Among Men With and Without HIV. AIDS Behav 2026; : . PubMed PMID:42671695 PubMed Central PMC13591559.
- Tilves, C, Holingue, C, Wanigatunga, SK, Chia, CW, Zhao, N, Wu, MN, Schrack, JA, Simonsick, EM, Ferrucci, L, Tanaka, T et al.. Associations of self-reported and actigraphic sleep with gut microbiome composition and diversity among older adults. Sleep 2026; : . PubMed PMID:42570316 .
- Moradi, K, Hadidchi, R, Majbri, A, Hughes, TM, Lu, H, Zhu, Y, Mohammadi, S, Momtazmanesh, S, Mukherjee, P, Abdullah, M et al.. Temporalis muscle biomarkers from routine brain MRI and risk of dementia in two independent cohorts. Alzheimers Dement 2026; 22 (8): e71622. PubMed PMID:42559821 PubMed Central PMC13445788.
- Ma, W, Filigrana, P, Kaplan, RC, Kim, RS, Cordero, C, Daviglus, ML, Gallo, LC, Amezcua, PM, Matsushita, K, Pirzada, A et al.. Socioeconomic mobility and the prevalence and incidence of difficulties in daily living in US Hispanic/Latino adults. Ann Epidemiol 2026; 122 : 110238. PubMed PMID:42498144 .
- Lamoureux, NR, Saavedra, JM, Downer, B, Schrack, JA, Wanigatunga, AA. Physical activity fragmentation and functional decline among older adults: findings from the National Health and Aging Trends Study. J Gerontol A Biol Sci Med Sci 2026; 81 (9): . PubMed PMID:42423287 .
- Alver, SK, Cuthbertson, CC, Evenson, KR, Schrack, JA, Sotres-Alvarez, D, Anita, NZ, Mossavar-Rahmani, Y, Gallo, LC, Carlson, JA, Allison, M et al.. Non-Vigorous Physical Activity Associated with Reduced Hospitalization Risk with or without Diabetes or Peripheral Artery Disease: Study of Latinos. Med Sci Sports Exerc 2026; 58 (9): 2007-2019. PubMed PMID:42350300 PubMed Central PMC13446917.
