The purpose of this investigation was to examine the force-velocity relationship during electrically induced, submaximal concentric and eccentric contractions of . soreness (DOMS) (Nosaka & Newton, b; Nosaka, Sakamoto, Newton, The relationship between eccentric torque/force generation and contraction. While concentric contractions initiate movements, eccentric contractions slow or . On the descending limb of the length-tension curve, these sarcomeres will.
Force velocity relationship
During eccentric exercise the contracting muscle is forcibly lengthened. One commonly encountered example of eccentric exercise is downhill walking. As we step down the slope, the contracting quadriceps muscle controls the rate of knee flexion against the force of gravity and in the process the muscle undergoes an eccentric contraction with each step.
Immediately after the exercise there is no pain. This sets in several hours later and peaks at about 48 h. It is thought to result from muscle damage produced by the eccentric exercise.Force-velocity relationship
An interesting and important feature is the adaptation process. A second bout of eccentric exercise, a week after the first, leaves us much less stiff and sore.
The ability of muscle to rapidly adapt to the damage from eccentric exercise, to prevent further damage, provides the opportunity for a number of clinical applications. The subject of eccentric exercise and its mechanism has been discussed previously in a number of reviews Armstrong et al.
Brief perusal of the literature indicates that the subject is of growing interest. The aim in this review is to focus attention particularly on some of the indicators of the damage from unaccustomed eccentric exercise and their possible mechanisms. The discussion will consider how such indicators might be used to assess the degree of protection available to an individual in the event of exposure to further eccentric exercise and how this kind of knowledge might be useful in the clinic.
Initial event It is generally agreed that there are two prominent signs of damage in a muscle immediately after it has been subjected to a series of eccentric contractions. There are the presence of disrupted sarcomeres in myofibrils and damage to the excitation-contraction E-C coupling system. It remains a point of controversy which of these two represents the primary event. The alternative view is that the starting point is damage to components of the excitation-contraction E-C coupling process.
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Force velocity relationship – Strength & Conditioning Research
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