The form for the squat thrust is relatively easy, but effortful, in which the real work starts from the initial (LeCuyer, 2001). The change in position depends on the variation in the movement of fibrous, cartilaginous and synovial joints. These types of different movements of the shoulder, knee joints, hips, and elbow and wrist joints are explained in this report with the help of an individual doing squat thrust. This paper also shows the factors that may affect the range of body movement.
Squat Thrust and Movements of Body Parts/ Joints
Squat thrust is a kind of exercise, in which the changes in the position of shoulders is mainly seen due to the bending of hands with the straight arms and keeping them on the floor (LeCuyer, 2001). At the same time, legs are also straightened out by quickly drawn towards the body (Griffis, 2016). Squat thrust can be seen in the diagram (appendix), in which an individual is doing this form of exercise.
From the starting point to the second position, it can be seen that the movements of body parts are being changed with the change in angles. The starting point shows that the angle of the body is 90 degrees. At this stage, the type of body movement can be flexion and extension (Nelson & Kokkonen, 2014). These movements may affect the angle between two parts of the body.
The angle of the body in first position is 45 degree, while the type of the body movement is called rotation, in which body moves towards or away from the centre point (Cohen & Taylor, 2005). On the other hand, this movement has been changed at second stage, where the angle has been reduced from 45 degree and the body movement is called abduction, as the motion is pulling the parts or legs away from the midline of the body.
There are different types of joints called fibrous, cartilaginous and synovial joints (Waugh & Grant, 2014). In this squat thrust, the types of movement of all these types of joints are different. For instance, fibrous joints (connects bones) allow no movement at all instead of the time of birth. Therefore, there is no movement of this in the squat thrust. On the other hand, the cartilage joints (present in long bones as humerus (upper-arm) and femur (upper-leg) are allowing a limited degree of smooth/flexible movement of the hand and legs to be moved.
Synovial joints are known as the freely movable joints, which have numerous types such as ball and socket joints, hinge joints, gilding joints, and compound joints (Twietmeyer & McCracken, 2001). Ball and socket joint is important to be noticed in the concerned squat thrust, as this is formed at the place where the rounded head of one bone is fitted into the hollow and a cup-shaped socket of another bone. Shoulder joint and hip joint are the example of this type.
The movement of the shoulder joint of the individual in the all three positions is circumduction, which is a combination of all the flexion, extension, adduction and/or abduction movements. At the starting point, these joints allow to move in all the directions. However, mainly the flexion is being observed that further can be changed with the angles. On the other hand, the hip joint movement is also circumduction, which is flexion at first position and extension at the second.
Hinge joints are shown at the point where convex surface of one bone is fitted into another bone’s concave surface such as knee and the elbow and wrist joints (Pandy, 2001). These joints are allowed to move in any plan freely using rotation. In different steps of squat thrust, their movements are different. For instance, starting position shows that these joints are at rest. The first and second positions reflect that the elbow and wrist joints are doing dorsiflexion (special movement of hand extension). Conversely, the movement of knee joints in both the first and second positions is called abduction, which is pulling the joints away from the centre point.
The flexibility (range of these joints) of the individuals’ body parts is normal but indifferent in all the three conditions. For instance, flexibility is dynamic at the initial point. However, in later stages it has become active, as the body has started doing squat thrust using extension, flexion, and other kinds of movements.
All the joints are positively related to the active range because it occurs in those joints, which do not require huge effort. These ranges might be affected by numerous factors during this squat thrust (Clarkson, 2000). For instance, fat mass, injuries and disease, and tissue extensibility may transform active range to the passive range where body is not able to move or might be paralysed (Cohen & Taylor, 2005; Clarkson, 2000).
Squat thrust of the individual in the diagram showing different kinds of movements of joints at every step of the exercise. However, these movements might be affected if the injuries, disease, or other irregular events occur.
Clarkson, H.M., 2000. Musculoskeletal assessment: joint range of motion and manual muscle strength. Lippincott Williams & Wilkins.
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Griffis, S., 2016. Substitute for a Straight Leg Squat Thrust. [Online] Available at: http://livehealthy.chron.com/substitute-straight-leg-squat-thrust-8908.html [Accessed 20th February 2016].
LeCuyer, J., 2001. Designing the Fitness Program: A Guide for Public Safety Organizations. PennWell Books.
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Pandy, M.G., 2001. Computer modeling and simulation of human movement. Annual review of biomedical engineering , 3(1), pp. 245-273.
Twietmeyer, A. & McCracken, T., 2001. Coloring Guide to Human Anatomy. Lippincott Williams & Wilkins.
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