Muscular dystrophy

One of the main goals in the field of exercise science is to determine methods of enhancing performance during exercise or competition. When comparing methods of performance enhancement two essential theories come to mind: utilization of the stretch-shortening cycle (SSC) and post activation potentiation (PAP), which both result from pre-activation (Fukutani, Misaki & Isaka, 2016, Nibali, Chapman, Robergs & Drinkwater, 2013) The SSC focuses on increases in muscle force output through a…

What would happen if we had no ankles? Ankles are crucial to our movement and play a huge part in moving our feet and walking. The ankle is a large joint made up of three main bones. These three main bones are the tibia, the fibula and the talus which all join together to make the ankle joint which helps control movement in your foot.The ankle contributes to a lot of lower limb stability which allows humans to run, jump and perform various other activities which require moving.The ankles…

Introduction Some of the most important organs in the human body are muscles. Muscles usually make up 30-50% of the body and are responsible for producing skeletal movement, maintaining body position, and regulating body temperature. In a lab, the process of muscle contraction was investigated by exploring the sliding filament theory. An experiment was conducted to determine whether muscle length played a role in the amount of force a muscle produces. In order to fully understand how a muscle…

Power Power is a relevant and one of the most important skill-related components of fitness to the performance of a javelin throw. Muscular power is the ability to combine strength and speed in an explosive action and this is shown in a javelin throw. There are two types of powers, speed-dominated power, which is power generated through a greater emphasis on speed and is essential in activities such as sprinting and throwing which javelin includes. As well as strength-dominated power, which is…

For this lab report the class goal was to figure out if our dominate hand is stronger than our non-dominate hand. There are a few factors that come into play when measuring this, the first thing that is important to know is what a muscle is and how it works. According to Medicine net a muscle is “the tissue of the body which primarily functions as a source of power.” A muscle is also used for movement and keeping body parts in their right positions. There are 3 different types of muscles,…

Research In 1903, Robert Osgood, a US orthopedic surgeon, and Carl Schlatter, a Swiss surgeon, concurrently described the disease that now bears their names. They found a pattern in which teenagers who are still growing often experience knee pain and inflammation in the area just below the knee and they called it Osgood-Schlatter disease. Teens experience symptoms of this while doing athletic activities or doing some regular exercise like climbing stairs. They feel pain in their knee,…

The adult human skeletal system consists of tendons, ligaments, and cartilage that connects two hundred and six bones in the body. Each element plays a vital role in the function of support, movement, protection, blood cell production, calcium storage, and endocrine regulation. Typically a bone has a dense and tough outer layer followed by a spongy layer that is lighter and flexible. In the middle of the bones are bone marrow, where new cells are constantly being made for blood. The skeletal…

1. Let the spinous processes release. Imagine them dropping and melting downward and stacked on the same plane. 2. Notice the balanced alignment of the left and right joints between the head and the top of the vertebrae, and the left and right joints between the ilium and sacrum. Become aware of the state of these joints and how they relate to each other, and trust the nervous system to start you on the path of better alignment. 3. Imagine the arrangement of the paired organs in the torso.…

In a skeletal system joints, ligaments, and tendons all go hand in hand. A joint is defined by two or more bones that meet. However, with the use of fibrous connective tissue, ligaments allow the joints to be held together. Ligaments are what prevent us from moving in an undesirable plane, another purpose they serve is that they limit the range or extent of normal movement (Wallace 2013). Unlike ligaments where the bone might be attached to another, tendons are fibrous tissue connecting the…

Due to the fact that one of the two ways to increase the strength of a muscle contraction is to increase the frequency at which the motor units fire in order to create a summed effect, it is expected that the shorter the time interval between consecutive stimuli, the greater the force of contraction. If there is a greater amount of time between the stimuli, the muscle would be able to relax before the next stimulus is fired. However, as that time decreases, the individual twitches begin to…