Impulse is simply a measure of the force applied for a specific time. Impulse = force x time and has units Ns (Newton seconds). It is an important concept in sport because many techniques, particularly throwing activities, require the performer to apply as large a force possible for as long as possible. The area of
Impulse & Force Time Graphs In Sport Read More »
A force is a push or a pull that alters the state of motion of a body and is measured in Newtons (N). As explained in Newton’s first law of motion a force is required to make a stationary body move, change speed, direction or stop. In sport, an internal force is one which is
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Graphs are a good way of showing motion visually. The two types of graphs that are of most interest are distance/time graphs and speed/time (or velocity/time) graphs. Graphs are particularly useful when things are moving too fast for the naked eye and brain to understand what is happening, which is often the case in sports.
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Inertia is the reluctance of a body to change whether it is moving or not and is related to its mass. Once a body is moving the momentum of the body is a product of its mass multiplied by its velocity. Mass The mass of a body refers to the amount of substance that it
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Here we explain the difference between distance and displacement, vector and scalar quantities as well as speed and velocity in sport and how to do calculations. Distance and displacement What is the difference between distance and displacement? Displacement is how far away a body has moved from its starting point. It is the shortest distance
Speed and Velocity in Sports Biomechanics Read More »
Acceleration is the rate at which a body changes its velocity and, similarly to velocity, it is a vector quantity which means it has a direction as well as a magnitude. We measure it in m/s/s or metres per second per second (metres per second squared – ms-2). For example, in the first 30m of
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HCG is a glycoprotein hormone that is produced during pregnancy by the embryo shortly after conception and later in large amounts, by the placenta. In fact, early pregnancy tests are based on the presence of HCG. The function of HCG during pregnancy is to maintain the corpus luteum (an endocrine structure found in the ovaries,
Human Chorionic Gonadotrophin (HCG) Read More »
Hormone antagonists and modulators, sometimes known as anti-oestrogenic substances act to either decrease the amount of oestrogen in the body or block the oestrogen receptors. Medical Uses of Hormone Antagonists and Modulators Some forms of Anti-oestrogenic drugs have been used in the treatment of breast cancer, contraception, osteoporosis and anovulatory infertility (infertility through cessation of
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Glucocorticosteroids are anti-inflammatory steroid hormones produced in the adrenal glands. Examples are Hydrocortisone, Prednisolone, and Prednisone. Medical Uses of Glucocorticosteroids Glucocorticosteroids are used as anti-inflammatories, in conditions such as severe asthma and allergic reactions. They are also used as immunosuppressants to prevent transplant rejection and in certain autoimmune disorders. Effects on Performance Some research has shown
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Cannabinoids are a compound contained in the Marijuana plant and its products. The cannabinoid compound contains a substance called THC which has psychoactive properties. Due to the fast absorption rate of THC by the lungs, cannabinoids have a rapid onset, with the effect on the central nervous system being obvious within 20 minutes with a
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