Effects Of Instructional Intervention And Self-exercise On Fitness In Middle Aged And Elderly Women

Objective: This study was designed as a randomized controlled trial, we give the aerobic exercise and strength training intervention to middle aged and elderly women in instructional intervention and self-exercise exercise mode. in order to explore the improvement of handgrip strength, Stand on one leg with closed eyes and functional fitness after 24-week exercise intervention.Methods: A total of 105 female Line Dancers aged 50~69 were recruited from Yangpu district,and they were randomly assigned to an aerobic exercise group(AEG, n=35), a combined aerobic and strength training group(CTG, n=35) and a combined aerobic and strength training add handgrip training group(CTG+, n=35), the AEG was the control group. Handgrip strength, Stand on one leg with closed eyes and functional fitness were tested to all participants before intervention, after instructional intervention and self-exercise. CTG and CTG+ both did the Chair exercise and dumbbell exercise two times per week, CTG+ add the handgrip training. All the three groups did the aerobic exercise five times per week for 24 weeks. In addition, both instructional intervention and self-exercise mode intervention 12 weeks.Results:(1)Compared instructional intervention with before intervention, AEG Chair sit and reach, Back scratch had improved significantly(p<0.05),30-second arm curl and 2-minute step test had decreased significantly(p<0.05). CTG 30-second chair stand, Chair sit and reach had improved significantly(p<0.05). CTG+ Handgrip, Stand on one leg with closed eyes and all functional fitness indictors except 8-foot up-and-go have improved significantly(p<0.05). After instructional intervention period, CTG improved in Stand on one leg with closed eyes and 2-minute step test compared with AEG(p<0.05);CTG+ improved in handgrip, Stand on one leg with closed eyes, 30-second chair stand, 30-second arm curl, 2-minute step test and Chair sit and reach compared with AEG(p<0.05);CTG+ improved in Chair sit and reach compared with CTG(p<0.05).(2) Compared self-exercise with instructional intervention, AEG 30-second arm curl and 2-minute step test had improved significantly(p<0.05). CTG 30-second chair stand, AEG 30-second arm curl, 2-minute step test and 8-foot up-and-go had improved significantly(p<0.05). CTG+ 8-foot up-and-go had improved significantly(p<0.05), but Chair sit and reach had decreased significantly(p<0.05). After self-exercise period, CTG improved in Stand on one leg with closed eyes compared with AEG(p<0.05);CTG+ improved in handgrip, Stand on one leg with closed eye, Back scratch, 30-second arm curl, 2-minute step test and Chair sit and reach compared with AEG(p<0.05).(3) Compared self-exercise and before intervention, AEG 30-second chair stand and 2-minute step test had improved significantly(p<0.05). CTG Handgrip, Stand on one leg with closed eye and all functional fitness indictors except Back scratch have improved significantly(p<0.05). CTG Handgrip, Stand on one leg with closed eye and all functional fitness indictors except 8-foot up-and-go have improved significantly(p<0.05).Conclusion: Instructional intervention modality combined training improve middle aged and elderly women’s balance ability, muscle strength and endurance better than aerobic exercise; after self-exercise the upper and lower limb strength, aerobic endurance and balance ability were improved, flexibility’s improvement is poor compared with instructional intervention; Add handgrip strength training could improve flexibility better.