At the beginning of the lift, the lifter's force is greater than the weight of the barbell to overcome inertia and initiate movement. During the middle of the lift, the lifter's force is equal to the weight of the barbell to maintain constant velocity. Towards the end of the lift, the lifter's force is less than the weight of the barbell due to deceleration and control.
folic acid
Muscular Endurance : NovaNet
Muscular Endurance : NovaNet
Muscular Endurance : NovaNet
The power during the lift is (weight of the barbell in Newtons)/4.4 watts.Note:Power is not "expended". Energy is. Power is the rate at which energy is expended.
Muscular Endurance : NovaNet
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barbell
This weightlifter did work on the barbell to lift it over her head.
Muscular energy is used when someone lifts a barbell to momentary muscular failure. This involves the contraction of muscles against resistance to lift the weight. Additionally, potential energy is converted to kinetic energy as the barbell is lifted against gravity.
Barbell