Interpretation:
When a muscle exercises, it constantly contracts and relaxes, using energy in the form of ATP to do so. When intensive exercise is conducted (e.g. performing exercise at peak performance), there may be an insufficient amount of oxygen present in the muscles, resulting in the cells performing anaerobic respiration to produce energy. Anaerobic respiration produces much less energy than anaerobic respiration, though does so without the presence of oxygen. Performing anaerobic respiration results in the creation of a toxic substance in the muscles known as lactic acid. The build up of lactic acid in the muscles and the reduction in energy production are the main two causes of muscle fatigue.
Thus, if prior exercise is undertaken,
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Evaluation:
Results:
The results gathered from the experiment demonstrated the predicted trend of the experiment. Overall the reliability of the results would be low, as the sample size only included a cumulative time of 2 and half minutes of exercise. A larger range would have benefited the reliability (e.g. continued exercise till muscle exhaustion) along with an increase in the amount of experiment participants. After comparing results with other groups, it is apparent that the validity of the trend is quite high, as the other groups has similar trends.
The resolution of the timer was reasonably high, as it went to two decimal places when timing, resulting in relatively accurate time keeping.
Experimental Procedure:
Overall, the experimental procedure was relatively strong, as the results gathered supported the predicted outcome. All of the variables that could be realistically controlled were and the resulted collected showed a consistent trend. This resulted in data that had a low scatter form the trend line. Overall the experimental procedure was quite strong, as it was easy to follow and execute, while also providing precise data and shows the relationship between prior exercise and the rate of muscle fatigue. Even though there were many strong aspects of the experiment, there were also some areas that could have been
As an individual who does not exercise on a regular basis, my results overall were quite poor, with a post-test average percentage of 32.5%, but it was still an improvement over my pre-test average of 22.9%. To analyse these results, I shall begin with the smaller components, to get a closer look at my shortcomings, improvements and why my results are generally unsatisfactory.
The mark of physical excretion to decide what is strenuous exercise will be determined by having the participating athletes do a Yo-Yo Intermittent Recovery Test. This is standardized fitness test to find out an
Regarding muscle soreness, the pre-exercise values were not different among groups. Muscle soreness significantly increased above baseline in all groups at all time points (p < 0.05; Fig 2). Peak soreness occurred in all groups at 24 hrs after exercise. Also, the three groups had no effect on soreness scores.
In relation to perceived exertion the subjects breathing rate stayed constant (see figure 2) because protein intake did not affect the subject’s performance and output. In other words, the hypothesis was proven to be true because protein intake did not affect the subject’s ability to perform in the final beep test, which is why the score obtained only had minimal changes from the beep test before the protein intake. Even though increased protein did not affect the subject’s performance, it was still used during recovery, which is why the subject could recover from dry land training the night before and still fill good to perform the beep test the next day. According to Cordain and Friel (2012) protein intake throughout the day, helps repair damaged muscle tissue. Therefore, over the three weeks the subject’s body was utilizing the protein intake as source to repair any tears in the muscle tissue, which lead to a better recovery. Given the following information the hypothesis was proved to be accurate because protein intake did not affect the subject’s performance during the beep test. However, to get a better understanding of increased protein intake, there should be a study performed to estimate how much time and protein the body requires to repair damaged muscle tissue after
well controlled experiment with use of a healthy population and their subjective exertion, in order to
Blood Pressure Similar to how researchers observed the short-term effects of resistance training on blood pressure, other researchers studied these effects for a longer period of time while varying the volumes, intensities, and duration of each exercise in the experimental exercise protocol. Because the studies took place for a longer duration of time, typically researchers utilized a lower to moderate intensity level in order to ensure that their subjects did not suffer any medical complications from a very high intensity exercise regimen for a long duration. Drenowatz et al., Kim et al. and Rondon et al. observed a decrease in blood pressure after the resistance training protocol. In addition to a drop in resting systolic and diastolic blood
After these pre-measurements were taken the study began. The group of 39 participants were split into two groups. One group would take part in the endurance training while the other groups would take part in the high interval training. Each group would take part in this training exercise twice a week for a total of 12 weeks. During the training a total of 9 participants dropped out of the study which allowed the researchers to break the groups into two even groups of 15 and 15.
Began the experiment by gathering the items required to begin (stopwatch, laptop for recording data, and athletic wear). Next, started the stopwatch as the first test subject began to sit in a wall sit position with legs at a ninety degree angle until the burning sensation arose in the quadriceps, then stopped the stopwatch and recorded the initial time used to set a basic level of fatigue in the body. Then rested for a 5 minute resting period to wait for the body to recover enough for another trial, proceeded by beginning the stopwatch and performing another trial, recording data after the time of fatigue is found, when the burning sensation began. Repeated the 5 minute resting period and took more data by performing another trial, then repeated
The duration of the experiment was not nearly enough time to improve the vertical jump extensively. The amount of time the subject was given was 4 weeks, improvement takes time and 4 weeks, as shown in the results was not enough time. The random physical state of the subject is another weakness of this experiment. Before doing the experiment, the health sheet was created to reason for these errors, this can be located in table (which table). Some days the subject feel more tired due to lack of sleep, extra physical exercise (sports), more hungry or full stomach, less motivated, more active and random incidents. Table 1 B shows the reasoning’s and explains the decrease. Another weakness of this experiment is that it is only tested by one subject and not multiple. Some subjects are more active than other making them more likely to have better results, by having multiple subject’s errors such as physical state can be eliminated. For this investigation to have better results the next time it is performed, some improvement will have to be implemented. This investigation can be further enhanced by having multiple subjects, controlling more variables: height of the vertec, clothes and shoes, longer duration of the experiment, get professional information (interview with a trainer) and ensure the usage of the vertec. By doing so, no sudden events can disturb the experiment altering the results. These improvements would reduce errors that have occurred during the experiment. As a result, a more polished experiment and a more reliable result would be collected and
The magnitude of an individual’s peak power, relative power and fatigue index can be directly related to an individuals training status. This can be determined by performing a short duration supramaximal anaerobic test. Peak power output heavily relies on the anaerobic metabolism within the body. Comprising of the adenosine triphosphate - phosphocreatine (ATP-PC) system and glycolytic anaerobic metabolic pathways. When physiological stress is placed on the metabolic, cardiovascular and musculoskeletal system during physical training our body is forced to adapt to cope with it more efficiently. Thus creating the differences in power and fatigue index within trained and untrained individuals.
The first independent variable is a plyometric training regimen. The plyometric training regimen will last for six weeks which allows for adequate time to see change in the athlete’s athletic power, or sprint time in the one hundred meter dash (Turner, 2003). The second independent variable is a traditional weight training regimen. Weight training sessions will stimulate the improvement of muscle strength. The stimulation of muscle strength may result in a direct correlation to the improvement of each participant one hundred meter dash time (Mosby’s 2009). The traditional weight training regimen will last six weeks also. The only dependent variable in the study will be
This experiment sought out to evaluate the affect of physical activity on the strength of a subject, with the use of an electromyogram. It was hypothesized that involvement in physical activity such as squeezing a tennis ball will decrease grip strength
The analysis of the results of the current study demonstrated a significant difference between mean change in pulse rate of subjects able to complete less than and greater than than 25 push ups (p < 0.05). The null hypothesis (H0) is rejected and the alternate hypothesis (Ha) retained. This suggests a correlation between aerobic and anaerobic fitness levels in completing high intensity exercise
For this particular lab, muscular strength, fatigue and endurance were measured by performing isometric forearm contractions. The purpose of this lab was to determine what happens to MVC during a muscle fatigue test and 4 “recovery” contractions; in addition, various differences between the generation of maximal force and the maintenance of MVC during the endurance test were also established among the subjects. Another reason for this lab was to examine the relationship between the subject characteristics, such as gender and training status, and their performance during both maximal force production and the endurance test. It is predicted that the results will show a decrease in MVC after the subject completes the muscle fatigue test as well as an increase in MVC during the recovery process. It is also anticipated that the male subjects will generate higher force values in comparison to the female participants due to increased muscle
Participants were instructed to perform as many push-ups as they could, then after resting, their pulse rate was taken. Then they undertook a moderate step-up exercise for 4 minutes and their pulse rate was measured again. The maximum number of push-ups was recorded and these values were compared against the individuals’ change in pulse rate before and after the step-up exercise. Statistical significance was determined using a t-test.