Investigation of acute effect of plyometric training combined with core strenght exercises on EMG values and some physical and physiological parameters

The aim of this study is to determine 30 meters (m) speed, vertical jump height (DS), leg-back strength (BSK) values, lumbar erector spinae (LES) after plyometric training (PA) and plyometric training (CKPA) combined with core strength exercises, gastrocnemius (GC), vastus lateralis (VL) and vastus medialis (VM) muscles are to examine the acute changes in time-dependent EMG values. 13 women who play active handball at A level team voluntarily participated in this study. Participants were divided into 3 groups according to the crossover design: CKPA, PA and control (KG). The groups switch as CKPA, PA and KG every week according to the study plan. Measurements were made after the exercising at 24 hour intervals, 3 days a week for 3 weeks. While the 30m sprint and DS tests are performed immediately after the exercising (USH), at the 5th minute (min.), and at the 10th minute, the EMG measurements performed simultaneously with the BSK test are repeated at the 5th, 10th and 15th minutes after the exercising made as measurements. The results showed; On 30m speed and DS, between exercising, between periods and in exercising-time interaction; On BSK, between the 5th and 10th minutes after PA training; On LES muscle EMG values, between exercising, 10th minute between CKPA and PA and 15th minute between PA and KG; A statistically significant difference was found between the 10th and 15th minutes after PA training on VL muscle EMG values (p≤0.05). On the LES muscle EMG values, between periods and in the interaction of exercising-time; There wasn't statistically significant difference in BHC performance, GC, VL and VM muscle EMG values between treatments, between the times, and in the interaction time-interaction (p>0.05). As a result; this study recommends the use of CKPA and PA as it improves the sportive performance of active handball players at the A team level. In addition, it increases and maintains speed and DS performance for 5 minutes after CKPA and PA training, increases and maintains BSC performance for 5 minutes after PA training, VL muscle EMG values for 15 minutes, LES muscle EMG values for 10 minutes after CKPA and PA training. It is recommended more for its enhancement and protection.