Blog

  • Levels of Complexity in the Biomechanical Analysis of Secondary Limb Participation During Resistance Exercise

    The fundamental premise of resistance exercise is to load a target muscle by applying a resistance source to a limb that is operated by that target muscle, and then contracting that muscle against the opposing resistance. The simplest example of this is grasping a dumbbell in one’s hand, and performing a “Dumbbell Curl” (aka a […]


  • Lombard’s Paradox: Misapplied

    In 1903, professor of physiology Warren Lombard wrote an article in which he described (what he believed was) a paradox that occurs when a person performs any type of Squatting movement. It was dubbed “Lombard’s Paradox” because he was unable to understand how a person was able to perform a Squat, despite an apparent conflict […]


  • “The Direction of Force” in Exercise Analysis

    The direction of the force you produce, during an exercise, determines which muscle is loaded more, and which muscle is loaded less. How do you determine the direction of force you’ll use during an exercise? It is dictated by the direction of resistance provided by each exercise. Let’s say you (at a bodyweight of 200 […]


  • Understanding (Not Misinterpreting)
    “Knee Strain”: Leg Press vs Leg Extension

    This particular study was done in 1993, and was published in PubMed.gov: https://pubmed.ncbi.nlm.nih.gov/8346760/ Unfortunately, some people refer to this study as “evidence” that Leg Extensions are “bad for the knees”. However, that is NOT the conclusion of this study. This is an example of cognitive bias, whereby people hear or read what they WANT to […]


  • Evaluating the Efficiency of a Resistance Exercise

    Determining “exercise efficiency” requires an understanding of biomechanics — and also of your specific goal Doug Brignole January 2020 Exercise, by definition, is used as the “means to an end.” It is not meant to be the end unto itself. Exercise is typically done for the purpose of eliciting a specific developmental response. For that […]