Education

  • PhD, Louisiana State University, Baton Rouge, LA, 2001, Clinical Psychology
  • MS, Eastern Washington University, Cheney, WA, 1996, Clinical Psychology
  • BA, Eastern Washington University, Cheney, WA, 1994, Psychology

Research Interests

Dr. Martin directs the Ingestive Behavior, Weight Management, & Health Promotion Laboratory, as well as the Human Phenotyping Core of Pennington Biomedical’s NIH-funded Nutrition Obesity Research Center (NORC).

He regularly conducts studies that involve in depth phenotyping of human participants, and he has extensive experience conducting interventions to modify health behaviors and outcomes, including food intake, exercise, and body weight. His research also includes the application of technology to assess and modify participants’ behavior through mobile health (mHealth) interventions while participants live at home. He was part of a team that developed and validated mathematical models that predict body mass change over time in response to dieting and overfeeding, and they then applied these models to quantify adherence to energy intake prescriptions.

His team incorporated this approach into clinic-based and mHealth weight management interventions, including SmartLoss®, a weight loss intervention that is remotely delivered via internet-connected devices (e.g., smartphones), and SmartMoms®, a weight management program to promote recommended levels of gestational weight gain among pregnant women. The SmartLoss intervention was further adapted in a pragmatic trial to deliver effective weight loss treatment to patients with low health literacy in outpatient clinics throughout the State of Louisiana. Finally, he develops and validates novel methods to assess health behaviors, and these assessment platforms provide the basis for mHealth interventions. To assess food intake, he developed and validated the Remote Food Photography Method© (RFPM) and SmartIntake® smartphone app, which accurately measures the food intake of adults and children based on images of foods captured by participants. More recently, his colleagues and he developed the FoodImage™ app to measure household-level food waste, and the PortionSize™ app to automatically provide feedback to users about portion size, food intake, and dietary adherence in real time. Lastly, via a collaboration with colleagues from Virginia Commonwealth University and East Carolina University, they developed eCigTracker, a novel smartphone app that quantifies e-cigarette users’ device and liquid characteristics remotely and in real-time.

Department: Ingestive Behavior Laboratory

Selected Publications

  1. Diktas, H. E., Cardel, M. I., Foster, G. D., LeBlanc, M. M., Dickinson, S. L., Ables, E. M., Chen, X., Nathan, R., Shapiro, D., & Martin, C. K. (2025). Development and validation of the Food Noise Questionnaire (FNQ). Obesity, 33(2), 289–297. PMID: 39828656; PMCID: PMC11774004. 

  2. Diktas, H. E., Lozano, C. P., Saha, S., Broyles, S. T., Martin, C. K., & Apolzan, J. W. (2025). Validity of the PortionSize™ and MyFitnessPal© smartphone apps for estimating dietary intake. Journal of Nutrition, 155(12), 4296–4306. PMID: 41022156; PMCID: PMC12573665. 

  3. Höchsmann, C., Dorling, J. L., Martin, C. K., Newton, R. L., Jr., Apolzan, J. W., Myers, C. A., Denstel, K. D., Mire, E. F., Johnson, W. D., Zhang, D., Arnold, C. L., Davis, T. C., Fonseca, V., Lavie, C. J., Price-Haywood, E. G., & Katzmarzyk, P. T. (2021). Effects of a 2-year primary care lifestyle intervention on cardiometabolic risk factors – A cluster-randomized trial. Circulation, 143(12), 1202–1214. PMID: 33557578; PMCID: PMC7987882. 

  4. Höchsmann, C., Yang, S., Ordovás, J. M., Dorling, J. L., Champagne, C. M., Apolzan, J. W., Greenway, F. L., Cardel, M. I., Foster, G. D., & Martin, C. K. (2023). The Personalized Nutrition Study (POINTS): Evaluation of a genetically informed weight loss approach. Nature Communications, 14, 6321. PMID: 37813841; PMCID: PMC10562431. 

  5. Jamshed, H., Steger, F. L., Bryan, D. R., Richman, J. S., Warriner, A. H., Hanick, C. J., Martin, C. K., Salvy, S., & Peterson, C. M. (2022). Effectiveness of early time-restricted eating for weight loss, fat loss, and cardiometabolic health. JAMA Internal Medicine, 182(9), 953–962. PMID: 35939311; PMCID: PMC9361187. 

  6. Katzmarzyk, P. T., Martin, C. K., Newton, R. L., Jr., Apolzan, J. W., Arnold, C. L., Davis, T. C., Price-Haywood, E. G., Denstel, K. D., Mire, E. F., Thethi, T. K., Brantley, P. J., Johnson, W. D., Fonseca, V., Gugel, J., Kennedy, K. B., Lavie, C. J., Sarpong, D. F., & Springgate, B. S. (2020). Weight loss in underserved patients. New England Journal of Medicine, 383(10), 909–918. PMID: 32877581; PMCID: PMC7493523. 

  7. Martin, C. K., Bhapkar, B., Pittas, A. G., Pieper, C. F., Das, S. K., Williamson, D. A., Scott, T., Redman, L. M., Stein, R., Gilhooly, C. H., Stewart, T., Robinson, L., & Roberts, S. B. (CALERIE Phase 2 Study Group). (2016). Effect of calorie restriction on mood, quality of life, sleep, and sexual function. JAMA Internal Medicine, 176(6), 743–752. PMID: 27136347; PMCID: PMC4905696.

  8. Martin, C. K., Carmichael, O. T., Carnell, S., Considine, R. V., Kareken, D. A., Dydak, U., Mattes, R. D., Scott, D., Shcherbinin, S., Nishiyama, H., Knights, A., Urva, S., Biernat, L., Pratt, E., Haupt, A., Mintun, M., Svaldi, D. O., Milicevic, Z., & Coskun, T. (2025). Tirzepatide on ingestive behavior in adults with overweight or obesity. Nature Medicine, 31(9), 3141–3150. PMID: 40555748; PMCID: PMC12443625.

  9. Martin, C. K., Correa, J. B., Han, H., Allen, H. R., Rood, J., Champagne, C. M., Gunturk, B., & Bray, G. A. (2012). Validity of the Remote Food Photography Method (RFPM). Obesity, 20(4), 891–899. PMID: 22134199; PMCID: PMC3975169.

  10. Martin, C. K., Heilbronn, L. K., de Jonge, L., DeLany, J. P., Volaufova, J., Anton, S. D., Redman, L., Smith, S. R., Williamson, D. A., & Ravussin, E. (2007). Effect of calorie restriction on resting metabolic rate and spontaneous physical activity. Obesity, 15(12), 2964–2973. PMID: 18198305.

  11. Martin, C. K., Höchsmann, C., Dorling, J. L., Bhapkar, M., Pieper, C. F., Racette, S. B., Das, S. K., Redman, L. M., Kraus, W. E., & Ravussin, E. (2022). Challenges in defining successful adherence to calorie restriction goals. Experimental Gerontology, 162, 111757. PMID: 35240264; PMCID: PMC8976757.

  12. Martin, C. K., Miller, A. C., Thomas, D. M., Champagne, C. M., Han, H., & Church, T. S. (2015). Efficacy of SmartLossSM. Obesity, 23, 935–942. PMID: 25919921; PMCID: PMC4414058.
  13. Martin, C. K., Williamson, D. A., Myers, C. A., Apolzan, J. W., Earnest, C. P., Thomas, D. M., Rood, J. C., Johannsen, N. M., Tudor-Locke, C., Harris, M., Hsia, D. S., & Church, T. S. (2019). Effect of different doses of supervised exercise (E-MECHANIC). American Journal of Clinical Nutrition, 110(3), 583–592. PMID: 31172175; PMCID: PMC6735935.

  14. Redman, L. M., Gilmore, L. A., Breaux, J., Thomas, D. M., Elkind-Hirsch, K., Stewart, T., Hsia, D. S., Burton, J., Apolzan, J. W., Cain, L. E., Altazan, A. D., Ragusa, S., Brady, H., Davis, A., Tilford, J. M., Sutton, E. F., & Martin, C. K. (2017). Effectiveness of SmartMoms. JMIR mHealth and uHealth, 5(9), e133. PMID: 28903892; PMCID: PMC5617906.
  15. Roe, B. E., Qi, D., Beyl, R. A., Neubig, K. E., Martin, C. K., & Apolzan, J. W. (2020). FoodImage™ smartphone app validity. Resources, Conservation & Recycling, 160, 104858. PMID: 32773964; PMCID: PMC7409719. 

NCBI Bibliography