Muscle Fatigue Experiment

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

Nerve and muscle twitch recruitment: External electrode stimulation of a nerve or muscle can lead to a twitch so long as the stimulus voltage is above the muscle or nerve’s threshold value. Electrical stimulation works to open ion channels without the muscle cells, leading to the firing of action potentials. After some time, however, a maximal stimulus voltage will be found. Voltages above this lead to no significant increase in the amplitude of the twitch. Our expectation was that twitch amplitude

Introduction 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 Background Failure to maintain muscular power output is dependent on the intensity and duration of the contractile activity2. Our experiment meant to fatigue the muscles of the foreman, which include eleven separate muscles5 through

between cellular respiration in the muscles, and muscle fatigue due to lactate fermentation in anaerobic respiration. Hypothesis: If the muscles in the fingers are continuously exercised, then the number of squeezes will constantly decrease in the dominant and non-dominant hand. This is because the lactic acid will begin forming due to the lack of oxygen present for the aerobic respiration to take place. The lactic acid would cause the muscles to experience fatigue therefore, reducing the ability to

reflexes involve skeletal muscle stimulation. Both types of reflexes are put into effect via the nervous system. (1) The Patellar reflex, or Knee-Jerk reflex, is used to test the nervous tissue in the spinal cord from L2-L4. The patellar reflex is known as a “reflex arc”. It is a negative feedback circuit that is made 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. This conclusion was supported

Skeletal muscles are in the body are used every day in the lives of humans and many animals. Our body’s muscle contractions are voluntary, meaning that we do not need to tell out muscles when to contract thought our daily activities, which is a truly an amazing phenomenon happening in our bodies. There are three different types of muscle tissues, these are the skeletal, smooth and cardiac. The smooth muscle is apart of the involuntary muscle contraction, this type of muscle tissue is important

Muscle Fatigue Date: 20/5/14 Introduction: I know that the more times I skip, lactic acid will build up in my legs, from my own experience this makes you fell horrible. As our bodies perform strenuous exercise, we begin to breathe faster as we attempt to move more oxygen to our working muscles. The body prefers to generate most of its energy using aerobic methods, meaning with oxygen. The cells follow the aerobic process when the blood supplies enough oxygen to

During each of the experiments, our hypotheses were either supported by the results or the data we gathered was inconclusive. For experiment 1, the focus was to determine the effect of stimulus intensity. These results are displayed in Figure 1 and Table 1. The voltage that caused the maximal contraction (supramaximal stimulus) of our muscle was 0.4V. The focus of Experiment 2 was measuring twitch duration. In Figure 2 and Table 2, the duration of each of the three twitches is displayed. As shown

The aim of the experiment was to examine the effects of carbohydrate supplements on the body and to determine if it helps increase the endurance performance. The main finding from the experiment was that carbohydrates do play an important role in helping endurance performance. The metabolic measurements from the experiment clearly demonstrate that carbohydrate supplements has a positive effect on the body which the data gather supports as well as the research studies on the effects of CHO loading