Muscle Fatigue Lab Report

The Wingate Anaerobic Test is used to evaluate anaerobic cycling performance. This study was undertaken to determine whether there is a relationship between peak power and fatigue index for endurance (n=9) vs power (n=4) athletes. A total of 13 subjects, including 8 males and 5 females, were included in the study. The subjects were divided into sporting types, such as endurance and power. Data collected from the Wingate test included peak power (W), mean power (W), time to peak (S), minimum power (W) and fatigue index (%). When the peak power and fatigue index were considered together for endurance athletes, a significant relationship

Four interval times (PR, RT, TP and RR) measured in seconds were recorded both with the subject at rest and after the subject had exercised. The PR and RT intervals remained virtually unchanged with the PR intervals remaining the same both before and after exercise with an interval time of 0.15 seconds, and the RT interval increase by 0.01 seconds from 0.37 at rest to 0.38 seconds after exercise. More substantial changes were noted in TP and RR intervals. The TP interval decreasing from 0.32 seconds at rest to just 0.08 seconds after exercise, a decrease of 0.24 seconds (just 25% of the resting 0.32 seconds). The RR interval decreased from 0.84 seconds at rest to 0.61 seconds seconds after exercise, a decrease of 0.23 seconds

In this assignment I will be reviewing the different effects of exercise on the body system including the acute and long term using the pre-exercise, exercise and post-exercise physiological data which I collected based on interval and continuous training method. I will also be including the advantages and disadvantages of these, also the participants’ strengths and areas where they can improve on.

It was hypothesized that intermittent exercise bouts are more effective than moderate continuous training, because participants will be able to exercise long and therefore, will have a greater work output. The main findings from this lab can be categorized into three sections, heart rate during exercise bout refer to figure 1. Total work over exercise type, refer to figure 2. Time to fatigue over exercise type, refer to figure 3.

EMG - Motor Recruitment and Fatigue Author’s Name: Institutional Affiliation: EMG - Motor Recruitment and Fatigue Introduction The main purpose of this laboratory was to help understand the relationship between electrical activity in the forearm muscles, known as electromyography (EMG), and fatigue. By using the information obtained between EMG and Dynamometry (DYN), motor unit recruitment and skeletal muscle fatigue was examined. When a motor unit in the skeletal muscle is activated, it generates electrical impulse signals, which result in contraction of a muscle.

Abstract Branched-chain amino acids (BCAAs) are commonly used as a pre-workout enhancement supplement for endurance and resistance. The objective of this experiment was to explore the effects BCAAs had on muscle contraction. Muscle contractions were measured twice on each of the five subjects; once before the BCAA supplement was consumed and again twenty-minutes following the consumption of the BCAA supplement. It was hypothesized that consumption of the BCAAs would result in increased muscle contraction levels while performing a simple arm movement with a weighted object. Subjects were fit with three vinyl electrodes with electrode gel on their dominant forearms.

(2004) and Dorling and Earnest (2003) studies are very well designed with few factors that could have significantly influenced the results. The explicit difference between both studies is the different type of exercise that was used in order to evaluate the effect of CMR on performance. Along the other previously cited studies, it seems clear that in the majority of cases, CMR has a nonsignificant effect on high intensity interval exercise unlike longer periods of exercise ( >30 minutes), where CMR shows to have an ergogenic effect on performance. Despite those results, relatively few studies have been conducted on this subject. There are still many unsettled areas such as the implication of the CNS, which makes it hard to adopt a definitive position. In order to help elucidate this theme, further research should be done especially regarding the CNS, which seems to have the missing

The purpose of the experiment in lab 5 was to see how force and EMG of the muscles would be affected when the wrist angles were changed. In order to determine how much the myosin and actin were interacting and how many times the muscle cell was stimulated we had to measure the force. When the wrist was fully flexed at 90-degrees the muscle was more contracted. Therefore, causing the sarcomere to be pushed closer together and the zone of overlap to be larger. This causes the myosin and actin to be on top of each other making it more difficult to have a quality cross bridge formation. This makes it harder to stimulate the muscle. As we continued to squeeze at different angles the force would get greater as the angle became more flat. We had the

This essay is based on research done over a study of mitochondrial myopathy, which is a disease of the muscular system. This is a consideration of the short communication article titled; “Short- and long-term effects of endurance training in patients with mitochondrial myopathy”, published by the European Journal of Neurology 2009. This was a collaborative project authored by; T.D. Jeppesen, M. Duno, M. Schwartz, T Krag, J. Rafiq, F. Wibrand, and J. Vissing. Hosted by; Neuromuscular Research Unit, Depatment of Neurology, and the Copenhagen Muscle Center; and “Department of Clinical Genetics, University of Copenhagen, Rigshospitalet, Copenhagon, Denmark. The purpose of this research was to determine whether endurance training was safe for patients with mitochondrial myopathy.

Hypothesis: As one exercises for longer amounts of time one’s heart rate will increase and take longer to get back to resting heart rate.

During this investigation individuals were asked to lift the weight and lower it down and repeat the cycle at their peak performance. There is a possibility that some individuals did not perform at their peak performance at all times. This could impact the number of cycles performed each time. Therefore, this error could affect the measurements and the correlation which was concluded from the data. However this error was inevitable, but to minimise its effect shortening the period of weight lifting could be suggested. This could promote participants to actually perform at their best rate. Also, selecting a larger sample size could minimise the effect of this random error by averaging.

If the subject started exercising again for another cycle the volunteer’s heart rate, breathing rate, and respiration will increase again to accommodate

This process is accelerated by an increase in sympathetic stimulation of adipose tissue during exercise. Maintaining a sufficient production of ATP during moderate to heavy dynamic exercise is required and dependent upon the breakdown of glycogen as well. Exhaustion occurs when glycogen stored in the muscles are depleted. Therefore, the capacity for sustained work at moderate to heavy intensities depends on the amount of stored glycogen, which varies from person to person and can be altered by prior activity and diet (Pflanzer

This paper will present studies indicating the affect exercise has on the human body and how it is useful in keeping us at our optimum physical and mental health. For now, aging is inevitable. Physiologically, we age because individual cells are preprogrammed to overwork and then

In this experiment, the purpose of this experiment was to study anaerobic metabolism and blood lactate levels after different periods of rest. Anaerobic metabolism is used when aerobic metabolism can no longer fuel energy needs. Anaerobic metabolism is used in certain conditions such as when in low oxygen conditions and exercising exceeding the capacity for oxygen delivery to tissues and aerobic energy production. In these conditions during glycolysis, glucose is broken down to pyruvate, resulting in the production of ATP, while at the same time reducing NAD+ to NADH. When oxygen is readily available, pyruvate enters the Kreb’s cycle where it is completely oxidized to carbon