What is the relationship between hand position and muscle activity when lifting an object?
What do the results in Table 1 show about the relationship between hand position and muscle activity when lifting an object? The results show that lifting an object underhand is significantly easier than overhand and it generates a lower amplitude of electrical activity and less muscle contraction.
What could be hypothesized about the number of nerve fibers involved in a reinforced reflex compared to an unreinforced reflex?
What can you hypothesize about the number of nerve fibers involved in a reinforced reflex as compared to one without reinforcement? Answer: when reflex stimuli are reinforced, the muscles throughout the body are more active and more nerve fibers are stimulated with the reflex hammer.
Can individual differences between data be attributed to any physical differences body shape size muscle mass physical fitness level )? Why?
Can individual differences be attributed to any physical differences (body shape/size, mus- cle mass, physical fitness level)? Yes, because the physiology of humans are all diffirent. All of the data collected throughout the class is all diverse as well due to each test subject being anatomical ly diverse.
What does the data in your graph tell you about the number of muscle contractions over time?
What does the data in your graph tell you about the number of squeezes over time? The number of squeezes of both hands decreases over time. The strength of the squeezing hand and arm decreased and became more tired towards the end of the squeezing-time period.
Which fiber type gets tired the fastest?
fast-twitch muscle fibers
What happens to muscle tension when the number of contracting muscle fibers increases?
Assume that a ‘twitch’ involves a single contraction of some portion of the fibers in the muscle. What happens to the amount of muscle tension when the number of contracting muscle fibers increases? The tension increases. The tension stays the same.
How do you calculate muscle fatigue?
Most recent answer. Measuring the Power Spectrum during voluntary activation (usually) or nerve stimulation one can assess the the muscle fatigue. The frequences of the EMG signals tend to drop or shift towards the lower frequencies as the muscle is becoming fatigued.
What does muscle fatigue look like?
Muscle fatigue is a symptom that makes it harder to move as normal. Some people experience a dull aching in the muscles. They may also feel constantly tired and lack the energy to perform everyday tasks. Exercise is a common cause of muscle fatigue.
What effect do fatigue have in performance of your hand muscle?
Fatigue slows the action of hand muscles. There are two reasons for this: The muscles are using up oxygen faster than it is being supplied to them, and there is a toxic effect from a buildup of waste products (carbon dioxide and lactic acid) in the muscle tissue.
What does muscle fatigue look like what causes it how can you measure it?
Muscle fatigue, it seems, can refer to a motor deficit, a perception or a decline in mental function, it can describe the gradual decrease in the force capacity of muscle or the endpoint of a sustained activity, and it can be measured as a reduction in muscle force, a change in electromyographic activity or an …
What are the three pathways to regenerate ATP?
The three mechanisms for ATP regeneration are creatine phosphate, anaerobic glycolysis, and aerobic metabolism.
Why do I get muscle fatigue fast?
Causes of muscle fatigue. Exercise and other physical activity are a common cause of muscle fatigue. Other possible causes of this symptom include: Addison’s disease.
How long does muscle fatigue last?
The time you suffer from muscle fatigue will depend on how far you’ve pushed yourself. With that said, though, you should be fully recovered within three to five days. If it lasts longer than that, then chances are you’ve pushed yourself further than you should and consider that for any future workouts.
Is it OK to workout if still sore?
In most cases, gentle recovery exercises like walking or swimming are safe if you’re sore after working out. They may even be beneficial and help you recover faster. But it’s important to rest if you’re experiencing symptoms of fatigue or are in pain.