Limited extension of the upper limb following physical exertion often stems from delayed onset muscle soreness (DOMS). This discomfort typically manifests 24-72 hours post-exercise, particularly after activities involving eccentric contractions, where muscles lengthen under load. An example is the controlled lowering phase during bicep curls or push-ups. This phenomenon induces microscopic muscle damage and subsequent inflammation, leading to a temporary restriction in range of motion.
Understanding the etiology of this post-exercise stiffness is crucial for optimizing training regimens and recovery strategies. Historically, this muscular phenomenon was attributed to lactic acid build-up, but contemporary research indicates that microtrauma to muscle fibers and the associated inflammatory response are the primary drivers. Recognizing this mechanism allows for more effective injury prevention and rehabilitation protocols. Addressing the underlying muscle damage can lead to a quicker recovery and improved athletic performance in the long term.
