Prof. Gayline F. Manalang Jr. is a physical therapist and occupational health professional. Before joining the College of Public Health, she was an instructor of physical therapy at the College of Allied Medical Professions.

As faculty of the University, most of Prof. Manalang’s extension and community service work had been with the Philippine Physical Therapy Association (PPTA), the Institute of Aging of the UP Manila-National Institutes of Health, and more recently the Philippine Society of Geriatrics and Gerontology (PSGG).

Prof. Manalang’s main research pursuits are with PhilSHIFT interdisciplinary group from the University of the Philippines and the Ludwig Maximilians University Munich (LMU Munich) whose collaborative efforts aim to study the Filipino chronotype (biological clock) and shift work. PhilSHIFT was a research program of the UP Center for Integrative and Development Studies (CIDS, 2016 to 2019) that aimed to work with industry towards strategies that
promote health, productivity, and sustainability of the local contact center workforce. Prof. Manalang stood as Principal Investigator of a PhilSHIFT project implementing the Philippine Chronotype and Social Jetlag Survey and developing a chronotype questionnaire for shift workers, co-funded by the CIDS and Philippine Council for Health Research and Development (PCHRD). She started her doctoral studies at the Center for International Health, LMU Munich with this as her doctoral project.

For her pursuits as a physical therapist, occupational health educator, and researcher in the field of chronobiology, Prof. Manalang is recognized by the Professional Regulation Commission of the Philippines as the 2017 Most Outstanding Professional in the field of Physical Therapy. In 2018 she was the lone recipient of a Researcher Links Travel Grant in the Philippine program of the British Council's Newton Fund. The grant enabled her to undertake a visiting researcher appointment at the Section of Chronobiology, University of Surrey, United Kingdom.