Effeets of Two Exercise Therapies on Ankle Muscle Strength and Static Balance Ability
The NJF technique is an emerging exercise therapy based on the PNF technique.In recent years,both exer-cise therapies have been utilized in various of fields,especially in sports and musculoskeletal rehabilitation.However only some studies have compared the effects of the two therapies.In the research,we wish to investigate the long-term intervention effects of the lower limb PNF technique and the ankle NJF technique in the balance and musculo-skeletal perspective.Methods:Twenty subjects were included and divided into PNF and NJF groups.Static balance and ankle muscle strength were collected using tecnobody balance test and training system and CON-TREX multi-joint isometric muscle strength test and training system and were tested before the intervention,on the first day after the intervention,and on the seventh day after the intervention.Lower limb PNF technique and ankle NJF technique interventions were performed on the PNF and NJF groups,respectively,for 20-25 minutes seven times a week for two weeks.Statistical methods were analyzed using two-way repeated measures ANOVA with significance levelα=0.05.Results:The time main effect was significant(P<0.05)for COP envelope area and relative peak moment of extensor muscles,while the interaction effect and group main effect were not significant(P>0.05);the group main effect and interaction effect of COP trajectory length were significant(P<0.05),while the time main effect was not significant(P>0.05).Further simple effects analyses revealed that the simple effects of COP trajectory length were significant(P<0.05),except for the group simple effect of COP trajectory length when time was fixed,which was not significant(P>0.05).Statistical results of relative peak flexor moments showed significant differences in the main effects of time and group(P>0.05),and no significant differences in the interaction effect(P>0.05).Conclu-sion:Both the lower limb PNF technique and the ankle NJF technique have long-term effects on improving static balance and ankle muscle strength,and the lower limb PNF technique was more effective than the ankle NJF tech-nique for static balance.
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