Positions
Education
Areas of Specialization:
Exercise physiology
Research Interests:
Mathematical modelling of physiological phenomena, sport and exercise performance, accelerometry and physical activity measurement
Current & Future Research:
Current research includes projects funded by two CIHR grants (Opportunities for Moving More and Sitting Less: Exploring a Whole School Approach to Improve Children's 24-Hour Movement Patterns, $504,990; and Implementation and Impact Evaluation of a Safe Active School Travel Planning Program, $199,020). Working with a network of collaborators from Nipissing, the Children’s Hospital of Northeastern Ontario, Queen’s University, Wilfrid Laurier University, the University of Prince Edward Island, and the University of Windsor, our goal is to use physical activity and sleep measurements derived from accelerometry data to identify opportunities for improving children’s 24-hr movement and implement low cost, theory-based, context specific school physical activity initiatives with a meaningful impact on target behaviours.
Other ongoing research projects include: investigations into the sex, age, and performance-based differences in pacing for cycling and running portions of triathlon events; the effects of a 6-week nose breathing running program on running performance, breath hold endurance, resting and exercising physiological variables; and, the physiological and biochemical changes occurring in participants who voluntarily consumed an all-wild food diet for 12 months.
Publications
Bruner, B., Rickwood, G., Shwed, A., Karvinen, K., Lévesque, L., Mantha, S., & Raymer, G. Child and parent perspectives on active transportation to school: Facilitators and barriers in a northern, rural environment. Journal of Transport & Health. 2023. 33(2): 101708. DOI:10.1016/j.jth.2023.101708
Gonçalves Galdino da Costa B, Bruner B, Benson SS, Raymer GH, Law B. Canadian Children’s Physical Activity and Sedentary Behaviors During Time-Segments of the School Day. Am J Health Education. 2022. DOI: 10.1080/19325037.2022.2071781
da Costa Bruno G. G. , Bruner Brenda , Raymer Graydon H. , Benson Sara M. Scharoun , Chaput Jean-Philippe , McGoey Tara , Rickwood Greg , Robertson-Wilson Jennifer , Saunders Travis J. , Law Barbi. Association of daily and time-segmented physical activity and sedentary behaviour with mental health of school children and adolescents from rural Northeastern Ontario, Canada. Frontiers in Psychology. 13. 2022. DOI=10.3389/fpsyg.2022.1025444
Belfry GR, Raymer GH, Marsh GD, Paterson DH, Thomas SG. Muscle metabolic status and acid-base balance during 10-s work:5-s recovery intermittent and continuous exercise. J Appl Physiol. 113(3):410-7. 2012.
McNeil CJ, Raymer GH, Doherty TJ, Marsh GD, and Rice CL. Geometry of a weight-bearing and non-weight bearing bone in the legs of young, old, and very old men. Calcif Tissue Int. 85(1): 22-30, 2009.
Raymer GH, Green HJ, Ranney DA, Marsh GD, and Thompson RT. Muscle metabolism and acid-base status during exercise in forearm work-related myalgia measured with 31P-MRS. J Appl Physiol. 106: 1198-1206, 2009.
Forbes SC, Raymer GH, Kowalchuk JM, Thompson RT and Marsh GD. Effects of recovery time on phosphocreatine kinetics during repeated bouts of heavy-intensity exercise. Eur.J.Appl.Physiol. 103(6): 665-675, 2008.
Raymer GH, Forbes SC, Kowalchuk JM, Thompson RT and Marsh GD. Prior exercise delays the onset of acidosis during incremental exercise. J Appl Physiol. 102: 1799-1805, 2007.
Raymer GH, Allman BL, Rice CL, Marsh GD and Thompson RT. Characteristics of a MR-compatible ankle exercise ergometer for a 3.0 T head-only MR scanner. Med Eng Phys. 28: 489-494, 2006.
Bartolini ME, Wilson K, Raja M, Raymer GH, Thompson RT, Webber CE and Moran GR. Dual X-ray absorptiometry model for characterizing water in the human forearm using multiple frequency bioimpedance analysis. Can J Physiol Pharmacol. 84: 181-193, 2006.
Raja MK, Raymer GH, Moran GR, Marsh G and Thompson RT. Changes in tissue water content measured with multiple-frequency bioimpedance and metabolism measured with 31P-MRS during progressive forearm exercise. J Appl Physiol. 101: 1070-1075, 2006.
Forbes SC, Raymer GH, Kowalchuk JM and Marsh GD. NaHCO3-induced alkalosis reduces the phosphocreatine slow component during heavy-intensity forearm exercise. J Appl Physiol. 99: 1668-1675, 2005.