According to Nasarov an outstanding improvement of flexibility could be reached by using the rhythmical neuromuscular stimulation (RNS). For proving this statement a study with 112 healthy fitness sportsmen and women was performed for three weeks at chest muscles. Overall, there was no clear advantage of RNS versus static stretch shown. However, it exists a dependence of improving flexibility by static stretch at simultaneous strength training. Persons who perform strength training obtain a higher improvement in flexibility than others. Using RNS the results in reaching high range of motions are independent of strength training and comparable to static stretch at simultaneous strength training. The results were discussed by a higher rate of biosynthesis induced by strength training respectively by the eccentric load of RNS.
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