Akademik Veri Yönetim Sistemi
fessh efsht 2023 congress, Rimini, İtalya, 10 - 13 Mayıs 2023, ss.413-414
purpose: triceps brachii is an important player especially in holding, pushing or pulling something even our own body weight. strengthening of this muscle can be done with isolated or combined elbow extension movements. to understand |
| the best method to activate the each of the muscle head, it is aimed to measure the electrical activity of M.triceps Brachii during three common strengthening exercises used in gyms. Methods: the study included unıversity students at the age range of 18-25 years with normal body mass index and without any neurologıcal or musculoskeletal problems. participants were excluded if they had hypermobility, pain in upper extremity, instability, abnormal elbow carrying angle. all participants were informed about the study and consent form was signed by all participants. triceps pulldown, triceps low push down and cable overhead triceps extension exercises were selected for electromyographic (EMg) measurements. for skin preparation, shaving was performed if necessary. the skin under the electrodes was cleaned by a skin preparation gel (nuprep, do Weaver and co, usa) until the electrical impedance of the skin was less than 5 KΩ by using an impedance meter (noraxon usa, inc, impedance meter). Before measurement process, the movement patterns and body postures of three different exercises were shown to the participants and a hands-on learning repetition was performed. the electrodes were placed on the long and the medial head of trıceps brachii. the placements were done according to surface ElectroMyography for the non-invasive assessment of Muscles (sEniaM) criteria. silver/silver chloride, pre-gelled surface EMg electrodes (ambu Blue sensor, denmark) and portable 8 channel teleEMg (Bts, Milan, italy) were used to record EMg signals during exercises. first, the participants completed three isometric maximum voluntary contraction (Mvics) test in prone position where the shoulder is in 90° abduction. then, EMg was recorded in 3 exercises. to avoid the potential effect of fatigue, the order of the tests was randomized. in each test participants were told to do the exercise 3 times, hold the maximum force for 5 seconds. rest for 2 minutes were allowed between exercises. to regulate the rythm of the start and end points of the exercise, 50 bpm metronome was used. the avarage of maxımum voluntary peak contraction was recorded from each head during each exercise. the difference between tests was analyzed with Wicoxon and student t test. results: Eleven students (7 male, 4 female) at the mean age of 21.72±1.42 years completed the study. the EMg signals of long and lateral head of triceps was significantly less in three exercises than Mvics (p<0.05). the activation of the muscle did not differ significantly between exercises (p>0.05), however long head was mostly activated during cable overhead triceps extension and the lateral head activation was higher during triceps low push down. discussion: for triceps strengthening, three exercises may have a similar effect. as activation of the muscle was greater during maximum isometric test, clinicans should be careful while designing isometric exercises. |