عنوان مقاله [English]
Background and Aim: Strengthen the back muscles such as trapezius and latissimus dorsi muscles can be considered as an essential part of any strength training program. The purpose of this study was to compare the electromyography activities in the latissimus dorsi and trapezius muscles during two different types of strength exercises. Materials and Methods: Twelve males (age: 23.4±3.19 years, weight: 78.5±2.84 kg, height: 179.8±4.28 cm) who were familiar with strength training exercises participated in this quasi-experimental study. Surface electromyography activity of the latissimus dorsi and trapezius (upper, middle and lower portions) muscles were recorded during performing lat pull-down and row cable exercises with different hands positions namely, close, wide and parallel grip. ANOVA with repeated measures was employed for data analyses. Results:The latissimus dorsi muscle indicated significantly greater electromyography activity during lat pull-down exercise with the wide grip position compared to other positions. All parts of the trapezius muscle showed greater activity during performing row cable exercise in all three hand grip positions in comparison with lat-pull down exercise. Conclusion: The results indicate that lat pull-down movement using the wide grip hand position could affects the activities of latissimus dorsi muscle whereas, the row cable exercise is more effective for strengthening the trapezius muscle.
De Nooij, R., Kallenberg, L. A. C., & Hermens, H. J. (2009). Evaluating the effect of electrode location on surface EMG
amplitude of the m. erector spinae p. longissimus dorsi. Journal of Electromyography and Kinesiology,19(4), e257-e266.
Paton, M. E., & Brown, J. M. (1994). Functional differentiation within latissimus dorsi. Electromyography and Clinical
neurophysiology, 35(5), 301-309.
Signorile, J. E., Zink, A. J., & Szwed, S. P. (2002). A comparative electromyographical investigation of muscle utilization
patterns using various hand positions during the lat pull-down. The Journal of Strength & Conditioning Research, 16(4), 539-546.
Snyder, B. J., & Leech, J. R. (2009). Voluntary increase in latissimus dorsi muscle activity during the lat pull-down
following expert instruction. The Journal of Strength & Conditioning Research, 23(8), 2204-2209.
Sperandei, S., Barros, M. A., Silveira-Júnior, P. C., & Oliveira, C. G. (2009). Electromyographic analysis of three different
types of lat pull-down. The Journal of Strength & Conditioning Research, 23(7), 2033-2038.
Wills, R., Signorilo, J., Perry, A., Tromblay, L., & Kwiatkowski, K. (1994). Differences in emg activity due to handgrip
position during the LAT pulldown. Medicine & Science in Sports & Exercise, 26(5), S21.
Yasushi, K., Hirofumi, K., Shuji, S., & Roger M. (2010) Enhancing the weight training experience: a comparison of
limb kinematics and EMG activity on three machines. European Journal of Applied Physiology, 109, 789–801.
Yoo, W. G. (2013). Effect of the Foot Placements on the Latissmus Dorsi and Low Back Muscle Activities during Pull-down Exercise. Journal of Physical Therapy Science, 25(9), 1155.
Youdas, J. W., Amundson, C. L., Cicero, K. S., Hahn, J. J., Harezlak, D. T., & Hollman, J. H. (2010). Surface electromyographic activation patterns and elbow joint motion during a pull-up, chin-up, or perfect-pullup™ rotational exercise. The Journal of Strength & Conditioning Research, 24(12), 3404-3414.
Bea, J. W., Blew, R. M., Howe, C., Hetherington-Rauth, M., & Going, S. B. (2017). Resistance Training Effects on Metabolic Function Among Youth: A Systematic Review. Pediatric exercise science, 1-42.
Ferrari, R., Kothe, G., Bottaro, M., Cadore, E. L., & Kruel, L. F. M. (2017). Muscle Mass and Training Status Do Not
Affect the Maximum Number of Repetitions in Different Upper-Body Resistance Exercises. The Open Sports Sciences
Doma, K., Deakin, G. B., & Ness, K. F. (2013). Kinematic and electromyographic comparisons between chin-ups and
lat-pull down exercises. Sports Biomechanics, 12(3), 302-313.
Escalante, G. (2017). Exercise Modification Strategies to Prevent and Train Around Shoulder Pain. Strength & Conditioning Journal, 39(3), 74-86.
Ekstrom, R. A., Donatelli, R. A., & Soderberg, G. L. (2003). Surface electromyographic analysis of exercises for the
trapezius and serratus anterior muscles. Journal of Orthopaedic & Sports Physical Therapy, 33(5), 247-258.
Ha, S. M., Kwon, O. Y., Cynn, H. S., Lee, W. H., Park, K. N., Kim, S. H., & Jung, D. Y. (2012). Comparison of
electromyographic activity of the lower trapezius and serratus anterior muscle in different arm-lifting scapular posterior tilt exercises. Physical Therapy in Sport, 13(4), e227-e232.
Itoi, E., Motzkin, N. E., Morrey, B. F., & An, K. N. (1992). Scapular inclination and inferior stability of the shoulder. Journal of Shoulder and Elbow Surgery, 1(3), 131-139.
Jackson, J. A., Mathiassen, S. E., & Dempsey, P. G. (2009). Methodological variance associated with normalization
of occupational upper trapezius EMG using sub-maximal reference contractions. Journal of Electromyography
and Kinesiology, 19(3), 416-427.
Lehman, G. J., Buchan, D. D., Lundy, A., Myers, N., & Nalborczyk, A. (2004). Variations in muscle activation levels
during traditional latissimus dorsi weight training exercises: An experimental study. Dynamic Medicine, 3(1), 4.
Lusk, S. J., Hale, B. D., & Russell, D. M. (2010). Grip width and forearm orientation effects on muscle activity during
the lat pull-down. The Journal of Strength & Conditioning Research, 24(7), 1895-1900.
Park, S. Y., & Yoo, W. G. (2013). Selective activation of the latissimus dorsi and the inferior fibers of trapezius at various
shoulder angles during isometric pull-down exertion. Journal of Electromyography and Kinesiology, 23(6), 1350-1355.