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Abstract
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Background: Neuromuscular coordination and the ability to maintain
one-legged balance are two important prerequisites for successful
taekwondo performance. This study investigated the effect of six weeks
neuromuscular training (NMT) and calcium-magnesium-zinc (Ca-MgZn) supplementation on balance and electromyographic (EMG) activity
of lower limb muscles among taekwondo athletes.
Methods: In a randomized control trial from September to December
2023 in the Regional Sports Concussion Center, sixty elite taekwondo
athletes were enrolled and assigned to four fifteen-member groups,
namely the control, Ca-Mg-Zn, NMT, and Ca-Mg-Zn+NMT groups.
NMT was performed three times a week for sixty minutes for six
consecutive weeks. Between-group and within-group analyzes were
performed to determine differences in demographics, static, control of
dynamic balance, and EMG between the 4 groups.
Results: The mean value of displacement of the center of pressure
decreased in all groups. There were significant differences between the
groups in terms of static and dynamic balance with eyes open. There was
no significant difference between the groups in the mean value of dynamic
balance with eyes closed. EMG activity of the tibialis anterior, rectus and
biceps femoris muscles 100-200 milliseconds after first contact did not
change significantly between the groups, while the effect size of the CaMg-Zn+NMT intervention on the increase in EMG activity and balance
control after the intervention was higher than other groups.
Conclusion: The combination of NMT and Ca-Mg-Zn supplementation
was more effective than NMT and Ca-Mg-Zn supplementation to improve
static and dynamic balance and EMG activity in taekwondo athletes.
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