Effect of electromyostimulation and plyometrics training on sports-specific parameters in badminton players

Badminton is one of the world's most popular racquet sports,demanding motor skills such as agility and vertical jump mainly for striking a shuttlecock.This study compared the effects of four weeks of plyometric training and electromyostimulation of knee extensor and ankle plantar flexor muscles on agility,30-m sprint,lower limb explosive power and jumping ability amongst badminton players.State-level badminton players(n=90)were randomly allocated into three groups:plyometric(PG),electromyostimulation(EG)and control group(CG),each with 30 players.Randomized-to-Groups Pretest-Posttest Design with two experimental(plyometric and electromyostimulation)groups and a control group was used.The plyometric training was carried out two times/week while the EMS training was four times/week for four weeks.The control group did not receive any intervention.All three groups continued their general badminton training throughout the study.Players were assessed for agility,a 30-m sprint,a standing broad jump and a vertical jump height before and after four weeks.A significant improvement(p=0.01)in 30-m sprint time was observed(3.83%)in PG as compared to controls.Jumping ability was significantly improved in both the PG and EG in comparison to the controls(4.45%,p=0.003 for PG and 3.95%,p=0.048 for EG).No significant improvement was found in agility and lower limb explosive power in either of the PG or EG groups in comparison to the controls.Plyometric training showed significant improvement in sprint time and jumping ability,whereas electromyostimulation training showed significant improvement only in jumping ability.