Free Advanced Personal Trainer Certification Course - Types of contraction || isotonic contraction

Our muscles can undergo mainly three types of contraction which are:- 1. Isotonic contraction. 2. Isometric contraction. 3. Isokinetic contraction. ISOTONIC CONTRACTION The isotonic contraction has two phases which are:- 1. Concentric phase (positive phase) 2. Eccentric phase (negative phase) Eccentric contraction for muscle growth:- https://www.youtube.com/watch?v=U6VKIbhLtG8&t=73s In isotonic contraction, muscles generate force in which the length of the muscle changes but the tension in the muscle remains constant and it can be a concentric contraction or eccentric contraction. 1. CONCENTRIC CONTRACTION A concentric contraction is an isotonic contraction where the muscle shortens. In this, the muscle tension rises to meet the resistance, then remains the same as the muscle shortens. In a concentric contraction, the muscle tension is sufficient to overcome the load, and the muscle shortens as it contracts. This occurs when the force generated by the muscle exceeds the load opposing its contraction. During a concentric contraction, a muscle is stimulated to contract according to the sliding filament theory. This occurs throughout the length of the muscle, generating a force at the origin and insertion, causing the muscle to shorten and changing the angle of the joint. A concentric contraction is a type of muscle contraction in which the muscles shorten while generating force and overcoming resistance. For example, when lifting a heavy weight while doing a biceps curl exercise a concentric contraction of the biceps would cause the arm to bend at the elbow, lifting the weight towards the shoulder. 2. ECCENTRIC CONTRACTION Eccentric contractions cause muscles to elongate (muscle lengthen) in response to a greater opposing force. Here, the muscle lengthens due to the resistance being greater than the force the muscle is producing. Rather than working to pull a joint in the direction of the muscle contraction, the muscle acts to decelerate the joint at the end of a movement or otherwise control the repositioning of a load. This can occur involuntarily (i.e when attempting to move a weight too heavy for the muscle to lift) or voluntarily (i.e when the muscle is 'smoothing out' a movement or resisting gravity such as during downhill walking). Over the short-term, strength training involving both eccentric and concentric contractions appear to increase muscular strength more than training with concentric contractions alone. During an eccentric contraction of the biceps muscle, the elbow starts the movement while bent and then straightens as the hand moves away from the shoulder.    Muscles undergoing heavy eccentric loading suffer greater damage when overloaded as compared to concentric loading. When eccentric contractions are used in weight training, they are normally called negatives.  Exercise featuring a heavy eccentric load can actually support a greater weight (muscles are approximately 40% stronger during eccentric contractions than during concentric contractions) and also results in greater muscular damage. Exercise that incorporates both eccentric and concentric muscular contractions (i.e. involving a strong contraction and a controlled lowering of the weight) can produce greater gains in strength than concentric contractions alone. Isotonic Contraction https://www.youtube.com/watch?v=Kq3oAQ7MlTk&t=25s Isometric Contraction https://www.youtube.com/watch?v=T6fTJJMZwPs&t=329s33 Isokinetic Contraction https://www.youtube.com/watch?v=k_JeHedUJ9w&t=60s JAI SINGH -(Gold-Medalist IITian) -Founder, Physique Engineer -Specialised Nutritionist, -Advanced Personal Trainer, -Female Fitness Trainer -Special Population Trainer - Author - Motivational speaker SHOP https://www.amazon.in/shop/physiqueengineer DESCRIPTION LINKS FACEBOOK PAGE :-https://www.facebook.com/physiqueengineer1/ INSTAGRAM :-https://www.instagram.com/physiqueengineer1/ WEBSITE:- https://www.physiqueengineer.net #isotonic #muscle #contraction #hypertrophy #fitness #health