Doctor insights on:
The Effects Of Strength Or Force In Skeletal Muscle Contractions
Different: Cardiac muscle is different than skeletal muscle (arms, legs, back, etc). Skeletal muscle contracts when stimulated by the nerves that supply it. Heart muscle fires spontaneously as various electrolytes change concentration in the surrounding tissue. The area called the sinus node typically passes the threshold first thus firing the electrical impulse. This area is modulated by brain inputs. ...Read more
It is a body tissue that has the ability to contract. It shortens and generates force. It relaxes and returns to its original length. Muscles move joints, stabilize the body, move air and food through the organs, act as valves for bladder, bowel and other organs. They control movement of the eyes. They help us express ourselves by changing the shape of our ...Read more
Little scoliosis can cause muscle spasms spread in the whole body?
Or it affects only some group of muscles?
Scoliosis: Scoliosis is usually not painful unless severe. Curves greater than 50 degrees most commonly cause pain. Your scoliosis may actually be a result of muscle spasm (sciatic scoliosis). If that is the case, treat the muscle spasm, and the scoliosis may disappear. Treatment of muscle spasms includes pt, stretching, heat/ice, otc meds. But if persistent, md evaluation will likely help to determine cause. ...Read moreSee 1 more doctor answer
Aerobics: Do marathon runners look like arnold schwartenegger? ...Read more
Very complicated: This gets pretty nuanced! Contractility is a concept that refers to the inherent ability for heart muscle cells or the heart in general to develop a certain amount of force for the same given amount of stretch (preload) and load (afterload). Force of contraction is how hard the muscle or the heart is contracting no matter what the loading conditions are. ...Read more
Does working out increase the size or the amount of muscle fibers? Also, is there a way to increase the actual number of fast twitch muscle fibers?
Muscle strengthening: We are born with fixed amount if muscle. Exercise increases the fiber size, but does. It add more fibers per se. Focused strengthening will reduce fat in muscle and improve the efficiency of contractions. I question if the fiber mix will change but there will significant improvement in performance like,this, so result will be the same. PT or exercise trainers can assist here. ...Read more
Can deterioration of the knee cartilage affect the whole leg? ( by way of muscle strain, cramps, or weakness when stepping)
Very Good Chance!: If your knee cartilage is damaged, your knee will not function correctly. Most folks will favor the other knee, or alter their body mechanics to compensate. This may with time lead to dysfunction in other areas. Your body can also involuntarily stop firing muscle groups to try to protect the injured knee. A good physical therapy program or home exercises may be an option if early enough. ...Read moreSee 1 more doctor answer
Which has the potential to increase bone mass density the most, strength training (1-5 reps) or hypertrophy (8-12 reps). I use a pair of dumbbells?
Weight bearing: Weight bearing exercise, such as walking, is the best form of exercise to increase bone mass density. Strength training and hypertrophic exercises can increase muscle strength and size, respectively, and may be somewhat helpful for increasing bone mass density, but the exercise method of choice is weight bearing. Carrying weight while walking can increase benefit. ...Read more
EccentricConcentric: When you lower your body to the floor, this is considered an eccentric exercise, where you're applying the load and lengthening the musculotendonous unit as you go down further. When you push away from the floor, this is considered a concentric exercise, as you shorten the musculotendonous unit as the load is applied. ...Read more
What would happen in the blood as a result of an increased contraction rate of the diaphragm and rib cage muscles?
Cramping: It may be an electrolyte imbalance need to get some lab work it may also be related to some of the medications you are taking. ...Read more
Cardio: It should not but you will loose fat. ...Read more
In dystonia are the muscles subjected to the involuntary contraction ever damaged from the involuntary contraction?
Bulk up: In all the dystonias i've seen, i can't think of one where the abnormal contraction itself caused muscle injury. Usually, the muscle bulks up due to repeated "exercise" from the dystonia. Over time there can be damage to adjacent joints. For example, torticollis can damage the neck joints over the years due to extra wear and tear. Dystoniascan cause the muscle to hurt, but not damage. ...Read more
Exercise: Yes. Of course.Get a more detailed answer ›
What muscle or muscles keep the lower portion of your nose firm? After the bone stops? Will facial paralysis cause complete collapse eventually?
If serotonin induced muscular rigidity causes the muscles to contract then are the blood vessels in those muscles also forced to contract?
Yes: You should talk with your doctor about switching to another medication. ...Read more
This usually has to do with the onset of labor. It is a muscular tightening of the uterus. Contractions are timed from beginning to end of hardening of the uterus (duration) and from beginning of one contraction until the beginning of the next (frequency). A third descriptor is intensity or how hard ...Read more
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