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Cable leg press machine. The leg press is a compound weight training exercise in which the individual pushes a weight or resistance away from them using their legs. The term leg press machine refers to the apparatus used to perform this exercise. [1] The leg press can be used to evaluate an athlete's overall lower body strength (from the ...
The development of a linear cam is similar to, but not identical to, that of a rotating cam. [17] Key duplicating machine. The original key (mounted in the left-hand holder) acts as a linear cam to control the cut depth for the duplicate. A common example of a linear cam is a key for a pin tumbler lock. The pins act as followers.
A straight-knee calf raise is often done using the leg press machine. The sledge is kept nearly locked out and the exerciser is meant to keep the hip and knee joints immobile. This is not a bodyweight exercise, the only body part actually being lifted is the small weight of the foot. The resistance comes from the sledge.
An example of a simple open chain is a serial robot manipulator. These robotic systems are constructed from a series of links connected by six one degree-of-freedom revolute or prismatic joints, so the system has six degrees of freedom. An example of a simple closed chain is the RSSR (revolute-spherical-spherical-revolute) spatial four-bar linkage.
Six degrees of freedom also refers to movement in video game-play. First-person shooter (FPS) games generally provide five degrees of freedom: forwards/backwards, slide left/right, up/down (jump/crouch/lie), yaw (turn left/right), and pitch (look up/down). If the game allows leaning control, then some consider it a sixth DOF; however, this may ...
The leg raise is a strength training exercise which targets the iliopsoas (the anterior hip flexors). Because the abdominal muscles are used isometrically to stabilize the body during the motion, leg raises are also often used to strengthen the rectus abdominis muscle and the internal and external oblique muscles.
Traditionally, the ideal pastern joint of the front leg was a 45-degree angle. However, this angle has been revised to a slightly steeper angle of 47-55 degrees, as the traditional angle, although it makes for comfortable riding, greatly increases the chance of breakdown.
A 45 degree back extension bench (note the different type of leg support from the Roman chair) Using a reverse back extension machine (reverse hyperextension machine) This machine has been used to strengthen not only the erector spinae muscle, but also gluteus maximus and part of hamstring muscles (biceps femoris).