Tanimoto, M.; Arakawa, H.; Sato, M.; Nagano, A. Lateral Force and EMG Activity in Wide- and Narrow-Grip Bench Press in Various Conditions. Sports2023, 11, 154.
Tanimoto, M.; Arakawa, H.; Sato, M.; Nagano, A. Lateral Force and EMG Activity in Wide- and Narrow-Grip Bench Press in Various Conditions. Sports 2023, 11, 154.
Tanimoto, M.; Arakawa, H.; Sato, M.; Nagano, A. Lateral Force and EMG Activity in Wide- and Narrow-Grip Bench Press in Various Conditions. Sports2023, 11, 154.
Tanimoto, M.; Arakawa, H.; Sato, M.; Nagano, A. Lateral Force and EMG Activity in Wide- and Narrow-Grip Bench Press in Various Conditions. Sports 2023, 11, 154.
Abstract
The purpose of this study was to investigate the horizontal force and contribution of shoulder horizontal adductor and elbow extensor muscles activity during wide and narrow grip bench press (BP) in various conditions, such as resistance trained/non-trained, concentric/eccentric and muscle fatigue/non-fatigue. We measured the horizontal force on the bar and the electromyographic (EMG) muscle activity of pectoralis major (PM) and triceps brachii (TB) during 10RM BP with wide grip (81cm) and narrow grip (40cm) in 7 resistance trained men and 7 non-trained men. The all-reps average of the horizontal to vertical force ratio both in resistance trained and non-trained subjects was about 30% outward for the wide grip, and about 10% inward for the narrow grip. The EMG contribution ratio PM/TB shows no significant differences between narrow and wide grip in all evaluated conditions except in non-trained subjects muscle fatigue eccentric phase. Both resistance trained and non-trained subjects did not push the bar straight upward, and the EMG PM/TB was almost unchanged by hand width. The direction adjustment of the force on the bar that achieves almost the same muscle activity degree of the shoulder and elbow joints might be optimal BP kinetics.
Keywords
bench press; lateral force; electromyography; training experience; concentric and eccentric movement; muscle fatigue
Subject
Public Health and Healthcare, Other
Copyright:
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