What was lee last lunge

Apply sEMG to the four muscle groups under the above conditions to compare the activity of each muscle with maximal voluntary isometric contraction MVIC and compare the differences in activity of the lower extremity muscles due to instability. Before applying electrodes, they were sterilized with alcohol to minimize errors caused by skin resistance. In addition, hair was removed from the applying spot to reduce skin's resistance to muscle conduction signals.

The surface electrode is attached to the center of the muscle, taking into account the change in position of the muscle belly as the muscle contracts. All collected muscle conduction signals processed as the root mean square RMS to quantify.

To prevent data errors due to differences in muscle strength of each participants used the MVIC, the average muscle conduction signal was normalized to the MVIC for the remaining 3 seconds except the first and last 1 second, after measuring for 5 seconds during maximum isometric contractions for quantitative comparison analysis.

The mean values of measured data were used in this study, and the data processing collected was calculated and compared with the mean and standard deviations for each variable using the commercial statistics program, SPSS ver The general characteristics of participants were analyzed using technical statistics.

The Shapiro-Wilk test was used for a normal distribution. While participants were doing 4 types of lunge exercises, there was a difference in muscle activity according to exercise method. Post-test results to see the difference in muscle activity between each movement showed that Lunge 4 showed higher activity in all muscles, and the calf muscles were more active than when Lunge 1 performed Lunge 2.

The effect of weight and instability caused by olympic-bar and Surge was identified by the muscle conduction value of Lunge 1 is higher than Lunge 3 and Lunge 4. Also, muscle vastus medialis showed the highest muscle activity of Lunge 2 Table 2 Figure 1.

Comparison of each muscles EMG during to lunge exercise, G. The purpose of this study is to propose an unstable resistance device that is most effective in the lunge to balance and strengthen the muscles of the lower extremities of normal adult males. The results of the preceding study showed needs to explore again for the purpose of the instability device. The lunge requires more left and right movement and balance than the squats, since weight is applied to the legs on the floor, storing the propulsion in elastic energy, and then converting it back into a thrust that returns to its place.

And also requires continuous and dynamic control of the lower extremities to maintain adequate stability because it is applied on narrow floors. Also, lunge exercises can be easily performed by anyone, even if there are no special devices or assistants in narrow areas and spaces, and as one of the closed chain exercises for special functional needs, they are beneficial for the activity and training of muscle tissue.

In this study, the following four motion muscles were compared and analyzed. EMG was attached to the 4 target muscles, muscle gluteus medius, muscle vastus medialis, gastrocnemius muscle and anterior to measure the activity of the muscles and compared by MVIC. Although Lunge 1 had lower muscle activity than Lunge 2, the muscle activity of gastrocnemius muscle in Lunge 1 was rather high. This means that the ground reaction force of Lunge 1 has become more active on the dominant foot located in the front.

This means that the weight of the olympic-bar and the weight of the surge, the ground reaction force and the top-down method contributed to the instability. Nairn et al. In the exercise on bosu, a condition similar to lunge 2, the muscle activity of gastrocnemeus was higher than that of all other movements However, Lunge 2 showed vastus medialis higher than all other movements.

This means that muscle vastus medialis contributes to the stability of the knee compared to Lunge 1. And higher than the types using olympic-bar and Surge show that more weight loads and instability have made them more active as a reward for other muscles. This is consistent with the results of a prior study that, if instability increases above a certain level, the activation value of the muscle quadriceps femoris are reduced.

All 4 muscle activity levels in Lunge 3 were lower than in Lunge 4. Lunge 4 is a combination of bottom-up instability and top-down instability that affects lower extremity muscle activity than lunge 3 performed with bottom-up instability. The use of bottom-up instability for the purpose is considered to be an effective means of intervention for tasks that consider the characteristics of the patient's individual, as well as the lunge exercises. The generally application of the results of this study has the following limitations.

First, this study limited the participants to only young adults in 20s, so clinical application to patients is too much. In addition, the lasting effects of the lunge were not known.

However, this study will provide clinically sufficient value for application of purpose-appropriate instability resistance devices by presenting the results of the lunge exercise methods performed in various environments. In future studies, I wish to complement the limitations of this study, including the identification of various exercise movements, various participants, and continuous motion effects, so, can present lunge methods that can be closer to generalization.

The purpose of this study was to compare the activity of lower extremity muscles among 20 healthy adult males in terms of instability, and to identify the device for instability that can be effectively applied.

Thus, in this study, 4 lunge actions Lunge 1,2,3,4 were performed using sEMG devices and instability devices. There was a total of 4 target lower extremity muscles, muscle gluteus medius, muscle vastus medialis, gastrocnemius muscle and anterior, and activity was measured and compared through surface muscle conduction tests. The effect of top-down method on lower limb muscles was checked. In conclusion, top-down methods, like Bottom-up devices, can be used as training and intervention methods to provide an environment suitable for athletes' rehabilitation programs or athletic purposes, if used in accordance with their situations and purposes.

Title Author Keyword Volume Vol. Jae-Hong Lee E-mail heart dhc. Methods The study subjects were healthy twenties and were selected to have no orthopedic or neurological diseases. Conclusion This study showed the muscular activity of the lower extremities according to the lunge exercise using the instability tools.

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