Recent Submissions

  • The sag response in human muscle contraction 

    Smith, Ian C.; Ali, Jahaan; Power, Geoffrey A.; Herzog, Walter; (Springer, Kinesiology, University of Calgary, University of Guelph, http://www.springer.com/gp/open-access/authors-rights/self-archiving-policy/2124, Pre-print, 2018-03-08)
    PURPOSE: We examined how muscle length and time between stimuli (inter-pulse interval, IPI) influence declines in force (sag) seen during unfused tetani in the human adductor pollicis muscle. METHODS: A series of ...
  • Femoral strain during walking predicted with muscle forces from static and dynamic optimization 

    Edwards, W. B.; Miller, R.H.; Derrick, T.R. (Journal of Biomechanics, http://www.jbiomech.com/, Kinesiology, Human Performance Lab, University of Calgary, 2016-05-03)
    Mechanical strain plays an important role in skeletal health, and the ability to accurately and noninvasively quantify bone strain in vivo may be used to develop preventive measures that improve bone quality and decrease ...
  • A Cross-Bridge Based Model of Force Depression: Can a Single Modification Address both Transient and Steady-State Behaviours? 

    Herzog, Walter; Corr, David T. (Elsevier, Kinesiology, Human Performance Laboratory, University of Calgary, 2016-01)
    Force depression (FD), the reduction of isometric force following active shortening, is a phenomenon of skeletal muscle that has received significant attention in biomechanical and physiological literature, yet the mechanisms ...
  • Rapid Hamstring/Quadriceps Strength in ACL Reconstructed Elite Alpine Ski Racers 

    Herzog, Walter; Jordan, Matthew; Aagaard, Per (Medicine and science in sports and exercise, Kinesiology, Human Performance Laboratory, University of Calgary, 2016)
    Due to the importance of hamstrings (HAM) and quadriceps (QUAD) strength for anterior cruciate ligament (ACL) injury prevention, and the high incidence of ACL injury in ski racing, HAM and QUAD maximal and explosive ...
  • Response to Diet-Induced Obesity Produces Time-dependent Induction and Progression of Metabolic Osteoarthritis in Rat Knees 

    Herzog, Walter; Collins, Kelsey; Hart, David A,; Reimer, Raylene A.; Seerattan, Ruth A. (Journal of Orthopaedic Research, Kinesiology, Human Performance Laboratory, University of Calgary, 2016)
    Obesity, and corresponding chronic-low grade inflammation, is associated with the onset and progression of knee OA. The origin of this inflammation is poorly understood. Here, the effect of high fat, high sucrose (HFS) ...
  • The effect of compressive loading magnitude on in situ chondrocyte calcium signaling 

    Herzog, Walter; Madden, Ryan M.J.; Han, Sang-Kuy (Biomech Model Mechanobiol, Biomechanics and modeling in mechanobiology, Kinesiology, Human Performance Laboratory, University of Calgary, 2014-05)
    Chondrocyte metabolism is stimulated by deformation and is associated with structural changes in the cartilage extracellular matrix (ECM), suggesting that these cells are involved in maintaining tissue health and integrity. ...
  • In vivo Sarcomere Lengths and Sarcomere Elongations Are Not Uniform across an Intact Muscle 

    Herzog, Walter; Moo, Eng Kuan; Fortuna, Rafael; Sibole, Scott C.; Abusara, Ziad (Frontiers in Physiology, Kinesiology, Human Performance Laboratory, University of Calgary, 2016-05)
    Sarcomere lengths have been a crucial outcome measure for understanding and explaining basic muscle properties and muscle function. Sarcomere lengths for a given muscle are typically measured at a single spot, often in the ...
  • Relationship between inflammation, the gut microbiota, and metabolic osteoarthritis development: studies in a rat model 

    Herzog, Walter; Collins, Kelsey H; Paul, Heather A; Reimer, Raylene A; Seerattan, Ruth A; Hart, David A (Kinesiology, Human Performance Laboratory, University of Calgary, 2016)
    Western-type diets, high in fat and sugars, lead to obesity. Obesity in turn is associated with chronic inflammation, and thought to be a risk factor for the onset and increased rate of progression of metabolic osteoarthritis ...
  • A new paradigm for muscle contraction 

    Herzog, Walter; Powers, Krysta; Johnston, Kaleena; Duvall, Mike (Frontiers in Physiology, Kinesiology, Human Performance Laboratory, University of Calgary, 2015-06-10)
    Muscle contraction has fascinated lay people and scientists for centuries. However, a good understanding of how muscle contraction occurs seemed only possible once microscopy techniques had evolved to a level where basic ...
  • The stretch-shortening cycle (SSC) revisited: residual force enhancement contributes to increased performance during fast SSCs of human m. adductor pollicis 

    Herzog, Walter; Seiberl, Wolfgang; Power, Geoffrey A.; Hahn, Daniel (Physiological Reports, Physiological reports, Kinesiology, Human Performance Laboratory, University of Calgary, 2015)
    The stretch-shortening cycle (SSC) occurs in most everyday movements, and is thought to provoke a performance enhancement of the musculoskeletal system. However, mechanisms of this performance enhancement remain a matter ...

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