In addition to atelectrogens, a high concentration of oxygen can lead to alveolar damage with edema, inflammation, fibrin deposits and hyalinization. The exact extent of hyperoxia resulting in injury is unclear and varies with age and underlying lung pathology, but a reasonable rule of thumb is to assume that a concentration of more than 80% for more than 36 hours is likely to result in significant lasting damage; 60% to 80% are likely associated with a slower progressive injury. An inspired oxygen concentration of 50%, even when administered over a long period of time, is unlikely to cause pulmonary toxicity. Slow-twitch fibers are designed for endurance activities that require repeated long-term contractions, such as maintaining posture. B or running over a long distance. The ATP necessary for the slow contraction of fibers is produced by aerobic respiration (glycolysis and Krebs cycle), producing 30 ATP molecules from each glucose molecule in the presence of oxygen. The reaction is slower than anaerobic breathing and therefore not suitable for fast movements, but much more effective, which is why slow-twitch muscles do not get tired quickly. However, this reaction requires the supply of large amounts of oxygen to the muscle, which can quickly lead to a speed-limiting effect if the respiratory and circulatory systems cannot keep up. These fast-twitch muscle fibers are also known as fast-twitch intermediate fibers. You can use both aerobic and anaerobic metabolism almost equally to generate energy. In this way, they are a combination of type I and type II muscle fibers.
Understanding how the body`s physiology adapts to exercise can help you develop more effective exercise programs for your specific needs. Genetics determines how much of each type of muscle fiber you have; However, to determine if you contract dominant quickly or slowly, an invasive muscle biopsy would be necessary. So if you find that you tend to enjoy more endurance-focused activities and that they are relatively easy for you, you probably have a greater number of slow-twitch fibers. Conversely, if you really don`t like to run long runs, but you like to play sports that rely on short bursts of explosive movements, or if you like strength training because it`s relatively easy, you`re likely to be fiber dominant by contracting quickly. An exercise program that applies the right training strategies for your muscle fibers can help you maximize the efficiency and enjoyment of your workout time. Fast-twitch fibers are good for fast movements such as jumping or sprinting, which require short-term rapid muscle contractions. Unlike slow-twitch fibers, fast-twitch fibers depend on anaerobic respiration (glycolysis alone) to produce two ATP molecules per glucose molecule. Although it is much less effective than aerobic breathing, it is ideal for rapid movement spurts because it is not limited by oxygen demand. Lactate (lactic acid), a byproduct of anaerobic respiration, accumulates in muscle tissue, reduces pH (makes it more acidic and creates the tingling sensation in the muscles during exercise). This inhibits subsequent anaerobic respiration. While this may seem counterintuitive, it is a feedback cycle to protect muscles from overwork and the resulting damage.
Endurance training, while a less continuous stimulus, also produces similar adaptations in the early stages of the response to electrical stimulation. However, Luthi et al. (1986) found no change in fibrous distribution patterns of trained muscles after 6 weeks of intense resistance training. They also observed no significant changes in capillary-to-fiber ratio or hair density. Explosive body weight movements use fast-twitch muscle fibers. Skeletal muscle contains various fibers that allow for both fast short-term contractions and slower, reproducible long-term contractions. It is generally accepted that types of muscle fibers can be divided into two main types: slow-twitch muscle fibers (type I) and fast-twitch muscle fibers (type II). Fast-twitch fibers can be divided into type IIa and type IIb fibers.
Kiss mouth: deep, slow and steady breathing with prolonged exhalation; Observed with diabetic ketoacidosis and salicylate ingestion Skeletal muscle consists of bundles of individual muscle fibers called myocytes. Each myocyte contains many myofibrils, which are strands of protein (actin and myosin) that can cling and squeeze together. This shortens the muscle and causes muscle contraction. Muscle fibers can usually be divided into two categories based on how quickly they create tension, although all fibers generate the same amount of strength. Slow-twitch muscles contract more slowly (hence the name) and can function for long periods of time without running out of energy. Fast-twitch muscles are stronger, but they get tired faster. Nitrogen is absorbed by the alveoli more slowly than oxygen. In indoor air (with its 78% nitrogen), alveolar collapse is minimized by the persistent presence and pressure of nitrogen gas (the “nitrogen relay”). However, with 100% oxygen respiration, the high solubility of oxygen in the blood can lead to absorption ascectase in poorly ventilated areas and intrapulmonary bypass. The two types of skeletal muscle fibers are slow contractions (type I) and rapid contractions (type II). Slow-twitch muscle fibers support long-distance endurance activities such as marathon running, while fast-twitch muscle fibers support fast and powerful movements such as sprinting or weightlifting. One study looked at changes in muscle fibers in recreational runners who trained for a marathon.