Muscle Fatigue Experiment

8. Draw conclusions – Assuming that your experiment produced results identical to those seen in Table 4, would you reject or accept the hypothesis that you produced in question 3? Explain how you determined this.

Six different subjects all between the age of 21-25 from all different physical levels performed four experiments. Each experiment consisted of two sessions a warm-up and lifting both a 10 lbs and 15 lbs dumbbell with a two-minute break between the two loads. The warm-ups were bicep stretches, which involve three different stretches and lasted for about 30 seconds each for a two-minute stretch, cardio, which included step up until max heart rate was

Oxygen debt in the muscles is reached when oxygen levels are much lower than required during strenuous physical activity, causing lactate fermentation to occur in the cells leading to muscle fatigue. The results found in the experiment were the number of squeezes in the first trial for the dominant and non-dominant hands were significantly higher than the remaining ones. The results also showed as the trials continued, the number of muscle contractions decreased steadily which supported the hypothesis. However, there were some increased numbers for the dominant hand from trial 4 to 5 and trial 9 to 10. The non-dominant hand expressed similar unexpected results from trial 6 to 7 and trial 9 and 10. The reasons for these results might be due to the finger muscles being worked at the high intensity for a long period of time causing the muscles to consume higher amounts of oxygen thus producing more ATP production. This would cause the muscles to create more contractions towards the end of the trials. The unexpected results could also be caused by experimental errors such as faulty clothespins. The springs connecting the two ends of the clothespin was tight causing the number of contractions as the trials progressed having a more significant decrease. This is because the amount of energy required to open and close the clothespin would be higher, causing the lactate threshold to occur quicker. Due to this, the number of squeezes would decrease drastically as the trials progressed, in contrast to if the springs were normal. This would change the results by the difference between the trials not being evident therefore, not demonstrating the effects of muscle fatigue. Another factor that altered this experiment was the participant’s condition, Palmar Hyperhidrosis –excessive sweating on the palms – which

Based on the results of your experiment, would you reject or accept the hypothesis that you produced in question 1? Explain how you determined this.

2. This experiment is not able to support Matthew's hypothesis. Suggest specific improvements that will allow the experiment to more effectively test the given hypothesis. Explain why these changes are improvements.

Which of the following conclusions is most valid, given the results of experiment 1? 6-8.2

Draw conclusions – Assuming that your experiment produced results identical to those seen in Table 4, would you reject or accept the hypothesis that you produced in question 3? Explain how you determined this.

Rationale, Significance and Hypothesis. An extrinsic factor, which exerts a dominant influence on skeletal muscle fiber phenotype, is the nervous system. Buller et al. (1960) elegantly demonstrated the plastic nature of skeletal muscle fibers in response to changes in innervation type. Later, Lφmo and Westgaard (Lφmo and Westgaard, 1974; Westgaard and Lφmo, 1988) demonstrated that depolarization of muscle with specific patterns and frequencies of electrical activity are sufficient to cause changes in mature muscle fiber phenotypes. However, how myofibrillar gene expression and structural organization is affected by the frequency of impulses during activity, the amount of activity over time, or other characteristics of patterned activity is essentially unknown. To answer these questions will require the isolation and study of subsets of muscle-specific proteins in relation to different electrical activation patterns in vivo, an issue that cannot be easily addressed in preparations currently used in the study of muscle development and maintenance. However, using novel in vivo approaches can, in part, circumvent this difficulty.

Based on the results of your experiment, would you reject or accept the hypothesis that you produced in question 1? Explain how you determined this.

In this lab, the focus was to study muscular fitness. In muscular fitness, there are two main components of measurements that are being taken, which are muscular strength and muscular endurance. Muscular strength is an individual’s ability to exert their maximum force. To test muscular strength, there are multiple tests such as 1 RM , Static Handgrip Strength, and Back Strength Dynamometer test. Muscular endurance is an individual’s ability to sustain prolonged muscular contractions. Tests that reveal results about an individual’s muscular endurance would be tests such as YMCA Submaximal Bench Press, Push-Up, and Plank test. It is important to remember that there is no single test for endurance and strength that will tell an

The purpose of this lab was to better understand the human body by doing various activities and observing the three different muscle types. The activities were not conducted in order, but we did follow the instructions of each activity. However, there could be deviation since Vivian had allergies and I was sort of sick as well so our result may not be as accurate. By conduction the activities, we were able to analyze the different receptors in the skin and sense—for instance understanding the differences in receptors or taste and smell. Also, we were able to differentiate the three muscle types and observe the striation of the cardiac and skeletal muscle—and observe other differences in muscle types. By noticing that, for instance the tongue has different regions for different taste, we were able to infer that some taste are more important to distinguish than others. Also, by observing the different types of muscle, we were able to discuss the different functions and why the cardiac and skeletal muscle have striation. Lastly, it is important to understand the human body, not

According to the results, the time of prior exercise and the average number of cycles after the exercise were inversely proportional. The time of prior exercise assumed to be approximately proportional to the amount of exercise. Also, the number of cycles presumed to be inversely proportional to muscle fatigue. This is because greater muscle fatigue would prevent faster rate of muscle contraction, this would result in performing a lower number of cycles during a given period. Hence, based on the graph, it was inferred that the amount of previous exercise and muscle fatigue would have a positive linear relationship. This implies that as the amount of previous exercise increased the macule fatigue increased accordingly.

The muscle gets fatigued because of a decrease of oxygen levels, and accumulation of waste products and a loss of cellular energy.

This lab has taught the scientific methods that can be used to gather and test the data to complete a required experiment.Through the scientific methods I was able to develop a hypothesis and test it by collecting the data. As our hypothesis stated that Blue fish is most dominant in our lake because of less predatory threats.But after collecting the samples of fish from the lake We were not able to prove our hypothesis.As according to the data we collected the blue fish was less dominant as compared to green fish.So we compared our data to average class data but still we were not able to prove our hypothesis as green fish was most dominated in the lake because green fish had less predatory threats compared to blue fish .Thats why blue fish

Nearly anyone who works out regularly has experienced sore muscles after exercise. Sometimes you will feel it later that night, or the next morning and in some cases, you may actually think you are out of the woods, only to wake up two days later with stiff, tender muscles that feel as tight as rubber bands. For some people, sore muscles are a reward after a hard workout. In fact, some people are not happy unless they are sore after their workout, while others could live without it. Either way, all of us have probably experienced muscle soreness at one time or another.