Overcoming vs Yielding Isometrics - When and Why Overcoming isometrics bias intent, neural drive, and force expression. Yielding isometrics bias position specific strength, tolerance and force maintenance. We often use overcoming ISOs as a warm-up or as a primer/contrast pairing. We use yielding isometrics to prepare joints/tissues for more ballistic or dynamic work or when looking to facilitate stress relaxation later in a session. If you want to understand how I actually use isometrics inside