Shoulder
During the concentric phase of a reverse fly exercise, the shoulder joint primarily goes through horizontal abduction as the arms move outward away from the body. The scapulothoracic joint also engages to stabilize the shoulder blades and maintain proper alignment. This coordinated action involves the posterior deltoid and other muscles of the upper back to perform the movement efficiently and effectively.
hamstring
horizontal abduction
flexion exstention
Flexion
[pectoralis major
To see eccentric contraction, look at the biceps curl with flexion around the elbow. As you lower a weight, you are working against resistance, letting the joint angle increase to lower that object under your control.The opposite is the concentric contraction were the arm is flexed upward to decrease the angle at the elbow.
Forward kinematics calculates the end-effector position of a robot based on the joint angles. Reverse kinematics, on the other hand, determines the joint angles required to position the end-effector at a desired location. Essentially, forward kinematics looks at the robot from joint angles to end-effector position, while reverse kinematics works from end-effector position back to joint angles.
It should not. A U-Joint that is worn will make a knocking sound when it starts or reverses.
Concentric
The concentric phase of a dumbbell fly occurs when you lift the dumbbells from the starting position out to the sides back to the center, engaging the chest muscles. During this phase, the pectoral muscles contract to bring the weights together, which helps in strengthening and developing the chest. Proper form is crucial to maximize effectiveness and minimize the risk of injury.
Platonix joint ventures's motto is 'Work. Grow. Hatch. Fly. Together.'.