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  • Title: Overhead throwing biomechanics in cricketers: The effect of a run-up approach.
    Author: Dutton M, Gray J, Divekar N, Prins D, Tam N.
    Journal: Eur J Sport Sci; 2022 Nov; 22(11):1686-1694. PubMed ID: 34498548.
    Abstract:
    Overhead throwing by cricketers when fielding with different approaches has been described using two-dimensional analysis. Currently, the three-dimensional kinematic and kinetic characteristics of an overhead throw performed by cricketers following a run-up are unknown. Fifteen South African cricketers performed six overhead throws, from a stationary position and with a run-up over 15-20 m prior to fielding a ball, respectively. Kinematic data and ground reaction forces were collected throughout the throwing trials. Joint kinetics were calculated using inverse dynamics. An independent t-test or Mann-Whitney U-test was used to determine joint kinetic differences between throwing approaches. Differences between the kinematic waveforms for stationary and run-up throwing approaches were assessed using one-dimensional statistical parametric mapping ANOVA (P < 0.05). The shoulder, elbow and thoraco-lumbar joints displayed similar kinematics between throwing approaches. The run-up approach displayed increased hip flexion between 0-34% and 57-100% (F(1, 28) = 6.726; P = 0.01) of the throwing cycle; and lumbo-pelvic flexion between 57 and 65% (F(1, 28) = 6.823; P = 0.02) of the throwing cycle; greater shoulder compression (F(1, 28) = 1.036; P = 0.02) and posterior force (F(1, 28) = 1.052; P = 0.009) at maximum external rotation; yet less superior shoulder force (F(1, 28) = 1.744; P = 0.005) and elbow compression (F(1, 28) = 4.331; P = 0.03), superior (F(1, 28) = 1.212; P = 0.002) and medial (F(1, 28) = 1.370; P = 0.03) elbow forces at ball release, when compared to a stationary position. Cricketers maintain similar upper limb kinematics between overhead throwing approaches. However, throwing with a run-up approximately doubles the forces exerted on the shoulder at maximum external rotation, which is most likely caused by the greater dominant hip and lumbo-pelvic flexion noted. This may amplify the potential risk for shoulder injury when throwing.HighlightsThrowing arm motion is similar irrespective of the approach used by cricketers to throw.Throwing with a run-up produced increased angles of lumbo-pelvic and dominant hip flexion in various phases of the throwing cycle.Throwing with a run-up resulted in greater shoulder compression and posterior force at maximum external rotation.
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