Strengthening of Muscles with 1 KHz Alternating Current

Background: Different types of currents with varying stimulus parameters are used in clinical practice to serve different purposes. Out of these different forms of currents, medium frequency alternating currents are preferred due to their advantages over the other currents. For the purpose of strengthening the muscles, the most common frequencies used are 2.5 kHz and 4 kHz, and there is a dearth of literature regarding the use of other frequencies in the range.Methods: This study was conducted to luate the effect of 4 weeks of neuromuscular electrical stimulation with 1 kHz alternating current on the strength of wrist extensors of 18 healthy subjects.Results: The 4 week protocol of neuromuscular electrical stimulation with 1 kHz alternating current was found to result in a significant strength gains in the wrist extensor muscles of the included subjects.Conclusion: From this study it may be concluded that a carrier frequency of 1 kHz is an effective frequency for strengthening of muscles.