Molecular Transducers of Physical Activity Consortium

Study assessments are completed before and after the intervention period (exercise or control), and at specific interim time points during the intervention. Assessments include measurements of cardiorespiratory fitness, muscular strength, and body composition (including total body bone mineral content) determined by dual-energy x-ray absorptiometry (DXA). There is also collection of blood, muscle, and adipose tissue biospecimens, monitoring of free-living PA level using wearable devices, and completion of participant reported outcomes and health status by interview and/or questionnaire. An additional group of highly active (HA) individuals currently active in either EE (HAEE) or RE (HARE) are recruited for a single acute exercise testing session of either endurance or resistance exercise and other study assessments. MoTrPAC participants are recruited, trained, and assessed via six adult Clinical Centers (CC), involving 10 clinical sites. As part of the MoTrPAC functions, participant data and biological samples are transferred from the clinical sites to the Consortium Coordinating Center (CCC) Data Management, Analysis and Quality Control Center (DMAQC)and to the Biological Sample Repository, and later analyzed by the Consortium Chemical Analysis Sites (CAS) and the Bioinformatics Center (BIC). Biological samples collected in this project undergo molecular phenotyping, including metabolomic, lipidomic, proteomic, epigenomic, transcriptomic, and genomic analyses. These assays are done at the MoTrPAC CAS. Overall coordination of the study and analyses occurs at 4 institutions which make up the CCC and the BIC.