Warm-up with weighted bat and adjustment of upper limb muscle activity in bat swinging under movement correction conditions.
The effects of weighted bat warm-up on adjustment of upper limb muscle activity were investigated during baseball bat swinging under dynamic conditions that require a spatial and temporal adjustment of the swinging to hit a moving target. Seven male college baseball players participated in this study. Using a batting simulator, the task was to swing the standard bat coincident with the arrival timing and position of a moving target after three warm-up swings using a standard or weighted bat. There was no significant effect of weighted bat warm-up on muscle activity before impact associated with temporal or spatial movement corrections. However, lower inhibition of the extensor carpi ulnaris muscle activity was observed in a velocity-changed condition in the weighted bat warm-up, as compared to a standard bat warm-up. It is suggested that weighted bat warm-up decreases the adjustment ability associated with inhibition of muscle activation under movement correction conditions.
Yoichi
Y
Ohta
Yasumitsu
Y
Ishii
Sachi
S
Ikudome
Hiroki
H
Nakamoto
D000222:Adaptation, Physiological / Q000502:physiology*; D001484:Baseball / Q000502:physiology*; D001696:Biomechanical Phenomena; D004576:Electromyography; D006801:Humans; D008297:Male; D018482:Muscle, Skeletal / Q000502:physiology*; D019876:Sports Equipment; D013997:Time Factors; D034941:Upper Extremity / Q000502:physiology*; D063996:Warm-Up Exercise / Q000502:physiology*; D016474:Weight-Bearing / Q000502:physiology; D055815:Young Adult