Whether a muscle's job is to push or pull, bend or stand, lift or lower, muscle activity isn't rocket science. They contract according to the demands on your body and the request you have made of the muscle at that time. Understanding contractions...
There are many different theories and ways to resistance train. So many that it may become confusing when you are first starting out. The basics of a resistance training program lie in the type of contraction that you are performing. Dynamic...
Muscles are comprised of many individual fibers, in much the same way a rope is. When these fibers are stimulated, the muscle contracts. If there is a force acting in opposition, such as a weight, the fibers stretch, increasing tension. Different...
Isotonic and isometric contractions are changes that occur in your muscles when they move or come under some form of physical stress. Isotonic contraction occurs when your muscles change length and produce the force necessary to move the joints in...
An isometric contraction occurs when the muscles fire but there is no change in the muscle length. The wrist contracts isometrically when you carry a plate of food. The wrist flexors and extensors are both firing so you do not bend your wrist and...
Muscle contractions occur when your brain signals to your body to move a muscle or keep a muscle in a certain position. Two muscle contraction types are isometric and isotonic muscle contractions. Each muscle contraction type can help you to build...
Results with isometric muscle contractions range from beneficial to harmful. Beneficial results can help muscular strength while harmful results can prove damaging to muscular health. Knowing when to use isometrics properly can help your overall...
Isometric exercises are those that involve no movement. Instead, the muscle is contracted and then held in that position. Initially developed for use by patients with injured joints, isometric exercises are now performed by athletes and patients...
An isometric contraction is one in which a muscle is contracted but does not change length --- in fact, isometric actually means "of equal length." An example of an isometric contraction would be carrying a heavy box, which would require the...
Exercise and movement of the body in general consists of employing different muscle contractions, happening all the time. Whether you are walking, lifting weights, playing sports or washing your hair, muscles are contracting to allow the movement....
The deadlift is a full body exercise. Though mainly used to help strengthen the back and legs, the deadlift does have an impact on the arm muscles. Proper technique and grip can help you get the most out of your training. To gain strength, do...
Isometric exercises are static holds as opposed to moving a muscle through a range of motion. Examples of isometric exercises are pushing against a wall, holding a barbell over your head or holding a yoga pose for a fixed period. The opposite of...
The squat does not just work your legs, but also your hips and core musculature. The squat builds strength and power, improves your vertical jump and burns fat. This requires consistent training, effort and dedication as well as a basic...
When you think of resistance training, you most likely think of moving a joint back and forth, working both the lengthening and shortening of the muscle fibers. However, an isometric contraction does not work this way. When you perform an...
During an isometric contraction, your muscles maintain a constant length as resistance is applied, and no joint position occurs. The American College of Sports Medicine reports that increases in strength resulting from isometric training are...
When it comes to weightlifting, there are a number of ways you can go about it. Two of those different ways are isometric and isotonic weightlifting. Amateur weightlifters may not be familiar with these terms or what the differences between them...
Stretching the quadratus lumborum offers a few benefits. When your quadratus lumborum is tense, this limits muscle actions of the hip and torso. The quadratus lumborum muscle bends the spine to the side and raises the hip, and both movements are...
The muscles of the stomach can tear just like other muscles. A partial tear typically happens in the oblique muscles on the sides of the stomach, though the rectus abdominis (six-pack muscle) may also suffer a tear. Gentle abdominal contractions...
Your calf is made up of three muscles collectively called the triceps surae and, like other muscles, are vulnerable to strains and other injuries. A strain occurs when your muscle is stretched too far resulting in pain, swelling and sometimes...
Isometric exercises, or static contraction exercises, do not involve any joint movement or change in muscle length. You simply hold a position against resistance. Although this type of training has its place in some exercise routines, it does not...
Pullups are used to test muscular strength and endurance. Doing pullups requires a lot of work from many different muscles. Not only are you holding yourself up on the bar using your arms, you must support every muscle in between. Your body uses...
Medical conditions such as rheumatoid arthritis can lead to cartilage and mechanical deterioration in the shoulder joint, says the American Academy of Orthopaedic Surgeons. The condition causes friction in the shoulder joint, resulting in severe...
Good ballet dancers require a high level of muscle endurance, coordination, flexibility, posture and core stability. They must launch off the ground into spins, hold leg splits in the air and maintain correct posture and balance throughout the...
Isometric exercise, also called static tension, is a muscle contraction without significant movement or alteration in the distance between the two bones the muscle is attached to. You do not need any weights or other equipment for isometric...
The muscles on the sides of the waist are called the obliques. There are a pair on each side -- the internal obliques and the external obliques -- running diagonally in the opposite direction of the other. They are responsible for trunk rotation,...
Hanging on a pullup bar helps you increase your muscular strength, especially if you are not yet able to complete a pullup. The muscles strengthened while hanging on the bar depend on whether you are hanging with your arms straight or with your...
The piriformis muscle is a tiny muscle jutting out from a hole in your pelvic bones to the very top of your thigh bone. When your thigh is behind you, it rotates your thigh outward, but if your thigh is in front of your, it pulls your thigh away...
Isometrics are exercises without movement and can be used to improve your ability to jump. Also known as static strengthening, isometric exercises for your legs can develop improved strength at specific angles in your muscles. During your jump,...
Exercising at home is very convenient. The American College of Sports Medicine advises that developing a simple, convenient program at home increases your chances of maintaining an exercise program. You can work your biceps using soup cans, manual...
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