MoTrPAC Study Group, ; Brandt, A. R.; Fleg, J.; Goodpaster, B. H.; Jaeger, B.; Jin, C. A.; Johannsen, N. M.; Katz, D.; Keshishian, H.; Kohrt, W. M.; Kraus, W. E.; Lester, B.; Melanson, E. L.; Miller, M. E.; Montalvo, S.; Rejeski, W. J.; Shimly, S. M.; Smith, G. R.; Stowe, C. L.; Trappe, S.; AbouAssi, H.; Adams, N.; Amar, D.; Ashley, E.; Aslamy, A.; Bamman, M. M.; Belangee, A.; Bennett, W.; Bergman, B. C.; Bessesen, D. H.; Bodine, S. C.; Boyd, G.; Buford, T. W.; Burant, C. F.; Carnero, E. A.; Carr, S.; Chambers, T. L.; Chavez, C.; Chen, H.; Chen, S.-H.; Christle, J. W.; Claiborne, A.; Clark, N

The goal of the Molecular Transducers of Physical Activity Consortium (MoTrPAC) is to examine the physiological and molecular basis for health benefits in response to acute and chronic exercise. Prior to COVID-19 suspension, healthy, sedentary participants (N=206, 18-74y) were randomized to endurance exercise (N=80), resistance exercise (N=81), or non-exercise control (N=45) interventions. The prescribed vigorous acute endurance and resistance exercise bouts induced physiological and metabolic perturbations relative to resting homeostasis. The supervised chronic (3d/wk, 12wk) endurance or resistance training programs robustly improved several physiological parameters (i.e., VO2peak, muscular strength). Temporal biospecimen (blood, muscle, and adipose) collections and processing coupled to the acute exercise bouts were highly successful. In most cases, over 90% success was achieved for blood, muscle, and adipose samples. Endurance and resistance exercise induced distinct acute and chronic physiological responses, which provide a framework to interrogate the molecular basis for health adaptations to these two popular exercise modalities.