PENGARUH LATIHAN AEROBIK DAN ANAEROBIK TERHADAP AMBANG ANAEROBIK

This research is aimed at demonstrating: 1) the effects of aerobic exercise towards the increase of anaerobic threshold, 2) the effects of anaerobic exercise towards the anaerobic threshold, 3) the difference in effectiveness of aerobic and anaerobic exercise towards anaerobic threshold. This is an experimental study using Pretest – Posttest Group Design. The populations involved in this study were 21 volleyball players of GARUDA from Kulonprogo regency, Yogyakarta. The samples were all players of the population so that it is categorized as population research. The samples were divided into two experimental groups which were aerobic and anaerobic groups using ordinal-pairing approach. The variables were: 1) independent variables: Aerobic and Anaerobic Exercises, 2) the dependant variable: anaerobic threshold. To determine anaerobic threshold, the researcher used running tests from Janssen (1989). The data were analyzed using T-test and mean variation. The results of normality tests using Kolmogorov Smirnov for aerobic exercise, Z count 0.513 P = 0.955, the status of spreading was normal while Z count for anaerobic exercise was 0.625 p = 0.829, the status of spreading was normal. Homogeneity tests using F-tests resulted in F = 0.003, P = 0.959, meaning that the variance of the samples was homogenous. The hypothesis test to experimental group I which was the group of aerobic exercise resulted in t count = -16.686, p = 0.000 which implied that there was significant influence of aerobic exercise towards anaerobic threshold and one to experimental group II which was the group of aerobic exercise resulted in t count = -16.754, p = 0.000 which implied that there was significant influence of aerobic exercise towards anaerobic threshold. The mean pre-test was 58.55, Post-test was 167.557, so that the mean difference was 9. For the anaerobic exercise, the mean of Pre-test was 158.80 and Post-test was 163,30, so that the mean difference was 4.50. Thus, the aerobic exercise had bigger mean differences than anaerobic exercise which implies that aerobic exercise was more effective than anaerobic in relation to the capacity of anaerobic threshold. Keywords: Anaerobic threshold, field exercis

PENGARUH LATIHAN KONTINYU DAN INTERVAL TERHADAP KAPASITAS AEROBIK

This research aims at studying: (1) The influence of continual exercise towards aerobic capacity, (2) The influence of interval exercise towards aerobic capacity, (3) The different effectiveness of continual and interval towards maximal aerobic capacity. This is an experimental research study using Pre-Test-Post-Test Group Design. The populations in this research were 23 volleyball players of “Garuda” from Kulonprogo Regency, Yogyakarta. The samples were all populations so that this study is called as population research. The instruments used in this research were Multistage Fitness Test. The data were analyzed using t test, and mean deficiency. The results show that: (1) there were significant influences of continuous exercise towards the aerobic capacity, (2) there were significant influences of interval exercise towards the aerobic capacity, (3) there were significant differences in the effectiveness of continuous and interval exercise towards the aerobic capacity. Continuous exercise was more effective than the interval one. Keywords: Continuous Exercise, Interval Exercise, Aerobic Capacit

Exercise-induced left septal fascicular block: an expression of severe myocardial ischemia

The electrocardiogram (ECG) criteria for the left septal fascicular block (LSFB) are not universally accepted and many other denominations can be seen in literature: focal septal block, septal focal block, left septal fascicular block, left anterior septal block, septal fascicular conduction disorder of the left branch, left septal Purkinje network block, left septal subdivision block of the left bundle branch, anterior conduction delay, left median hemiblock, left medial subdivision block of the left bundle branch, middle fascicle block, block of the anteromedial division of the left bundle branch of His, and anteromedial divisional block. During exercise stress test, fascicular blocks (left anterior and posterior) seem to indicate severe coronary artery narrowing of left main coronary or proximal left anterior descending artery disease1 and transient exercise-induced left septal fascicular block has been reported a few times2,3. 54-year-old male, with a history of essential arterial systemic hypertension, primary hyperlipidemia and six-month typical chest pain during exercise (Class II – Canadian Cardiovascular Society) underwent an exercise stress test. During the exercise stress test, ECG demonstrated abrupt prominent anterior forces, an increase in R wave amplitude from V1 to V4, extreme left axis deviation and minor ST segment depression in DII, DIII and aVF (Figure 1). The post-exercise period showed progressive return of the QRS axis in both frontal and horizontal planes and the ST depression worsened by 1 mm. Coronary angiogram (Figure 2A) showed a critical proximal left anterior descending artery lesion. An exercise stress test done three months after coronary artery bypass surgery grafting was normal (Figure 2B)

Acute Effects of Exercise on Cognitive Performances of Older Adults

Accelerating rates of structural decline become evident during the third and fourth decades of human life, with disproportionate degeneration occurring in the frontal, parietal, and temporal brain lobes. As the structure of the brain declines, a broad array of cognitive processes involving memory, decision making, and selective attention are reduced as well (Raz 2000, Park et al. 2001). Cardiovascular exercise has been associated with improved cognitive functioning in aging humans, suggesting that increased vascular supply enhances availability of oxygen, nutrients, and other physical entities to nourish the brain. Previous experimentation on older adults revealed significant positive effects of exercise on a variety of memory types following participation in a program six or more months in duration (Colcombe 2003, Kramer et al.1999). The primary focus of this study was to test the effects of acute aerobic exercise on cognitive functioning of adults over the age of 60. A second purpose was to determine that the positive neurological effects of exercise can start taking place immediately. The hypothesis is that memory retention, mental processing speed, and selective attention would acutely improve in the participants after they had exercised, in comparison to their cognitive state prior to exercise. Cognitive performances both before and after exercise were tested using the Stroop test. All participants completed the post-exercise test with improved scores (p=0.000) indicating an increase in cognitive ability, relating exercise and improved cognitive function

Improvement of heart rate recovery after exercise training in older people.

Twenty-four subjects aged 70 and older were retrospectively selected from our archives and screened for symptoms of cardiovascular disease. Baseline exercise test was negative for myocardial ischemia in all subjects. All subjects had completed an 8-week program, performed for a variety of indications and consisting of an aerobic physical training program including 30 minutes of cycling three times per week at 65% to 75% of maximum heart rate achieved at peak exercise test performed at enrollment, an educational intervention, dietary advice, and psychological support. All subjects underwent a cardiopulmonary exercise test (CPX) before and at the end of exercise training. At the end of each CPX, peak oxygen uptake (VO2peak), the rate of increase of ventilation per unit of increase of carbon dioxide production (VE/VCO2slope), and HRR were recorded. Twenty-five healthy subjects younger than 60 with no evidence of exercise-induced myocardial ischemia and not enrolled in any exercise training program were also retrospectively selected from our archives and used as a control group for analyzing HRR. These patients performed two exercise tests several weeks apart. Several studies have shown that changes in vagal tone can be used as an outcome tool that helps identify patients or subjects with or without cardiovascular disease at risk for a cardiovascular event, although the evidence of a prognostic value of HRR in older subjects without cardiovascular disease is rather poor. In this study, exercise training resulted in HRR improvement in healthy elderly subjects, suggesting that exercise training improves vagal/sympathetic balance in older subjects without cardiovascular disease as well. Whether the observed improvement in HRR may have long-term beneficial prognostic effects was not the aim of the study, although a beneficial effect might be postulated, in light of the Framingham dat

Attentional distraction during exercise in overweight and normal-weight boys

The purpose of this study was to investigate the effect of attentional distraction on field running distance and activity intensity during an exercise session in normal-weight and overweight youngsters and to investigate potential mediators. Fifty-three 12–14 yr-old boys participated twice in a 12-min running test and a 20-min exercise session, once with attentional distraction (by listerning to music) and once without distraction (counterbalanced randomised controlled design). At the end of the endurance test running distance was recorded. During the exercise session activity intensity was assessed by accelerometers. After each experiment, rate of perceived exertion (RPE) was estimated and seven questions were asked about how participants experienced the experiment. Both overweight and normal-weight boys ran further during the running test with music (p < 0.05) and this effect was mediated by a decrease in feelings of annoyance. During the exercise session with music, both overweight and normal-weight boys exercised less at low and high intensity and more at moderate and very high intensity (p < 0.01) and this effect was mediated by a decrease in RPE. We can conclude that attentional distraction has a positive effect on running distance on a field endurance test and on activity intensity during an exercise session through different mechanisms in both overweight and normal-weight boys

The Effect of Dietary and Exercise Self-Management Support Program on Dietary Behavior Exercise Behavior and Clinical Outcomes in Muslim Patients with Poorly Controlled Type 2 DM in a Community Setting in Indonesia

Purpose: The objective of this study was to examine the effect of dietary and exercise self-management support program on the dietary behavior, exercise behavior, and clinical outcomes of Muslim patients with poorly controlled type 2 DM in Indonesia. Methods: This study was a quasi-experimental, two group, pre-test and post-test design. The experimental group received the dietary and exercise self-management support program and usual care, whereas the control group only received the usual nursing care.Result: 35 subjects in the experimental group and 35 subjects in the control group completed the program, respectively. The findings indicated that there are significantly differences in dietary behavior (p=.00), exercise behavior (p=.00) and clinical outcomes: fasting blood glucose (FBG) (p=.00), cholesterol total level (p=.01) and systolic blood pressure (p=.00) between the experimental group and control group. However, for the BMI status (p=.84) and diastolic blood pressure (BP) (p=.32) were no significant differences between two groups. Conclusion: The dietary and exercise self-management support program was effective for improving the dietary behavior, exercise behavior, FBG, and total cholesterol level for individuals with poorly controlled type 2 diabetes mellitus. Further studies should be replicated using larger groups over a longer time frame

Can exercise limits prevent post-exertional malaise in chronic fatigue syndrome? An uncontrolled clinical trial.

&lt;b&gt;Objective&lt;/b&gt;: It was hypothesized that the use of exercise limits prevents symptom increases and worsening of their health status following a walking exercise in people with Chronic Fatigue Syndrome (CFS). &lt;b&gt;Design&lt;/b&gt;: An uncontrolled clinical trial (semi-experimental design). &lt;b&gt;Setting&lt;/b&gt;: Outpatient clinic of a university department. &lt;b&gt;Subjects&lt;/b&gt;: 24 patients with CFS. &lt;b&gt;Interventions&lt;/b&gt;: Subjects undertook a walking test with the two concurrent exercise limits. Each subject walked at an &lt;i&gt;intensity&lt;/i&gt; where the maximum heart rate was determined by heart rate corresponding to the respiratory exchange ratio =1.0 derived from a previous sub-maximal exercise test and for a duration calculated from how long each patient felt they were able to walk. &lt;b&gt;Main outcome measures&lt;/b&gt;: The Short Form 36 Health Survey or SF-36, the CFS Symptom List, and the CFS-Activities and Participation Questionnaire were filled in prior to, immediately and 24 hours post-exercise. &lt;b&gt;Results&lt;/b&gt;: The fatigue increase observed immediately post-exercise (p=0.006) returned to pre-exercise levels 24 hours post-exercise. The increase in pain observed immediately post-exercise was retained at 24 hours post-exercise (p=0.03). Fourteen of 24 subjects experienced a clinically meaningful change in bodily pain (change of SF-36 bodily pain score ³10). Six of 24 participants indicated that the exercise bout had slightly worsened their health status, and 2 of 24 had a clinically meaningful decrease in vitality (change of SF-36 vitality score ³20). There was no change in activity limitations/participation restrictions. &lt;b&gt;Conclusion&lt;/b&gt;: It was shown that the use of exercise limits (limiting both the intensity and duration of exercise) prevents important health status changes following a walking exercise in people with CFS, but was unable to prevent short-term symptom increases

Enhancing performance during inclined loaded walking with a powered ankle-foot exoskeleton

A simple ankle-foot exoskeleton that assists plantarflexion during push-off can reduce the metabolic power during walking. This suggests that walking performance during a maximal incremental exercise could be improved with an exoskeleton if the exoskeleton is still efficient during maximal exercise intensities. Therefore, we quantified the walking performance during a maximal incremental exercise test with a powered and unpowered exoskeleton: uphill walking with progressively higher weights. Nine female subjects performed two incremental exercise tests with an exoskeleton: 1 day with (powered condition) and another day without (unpowered condition) plantarflexion assistance. Subjects walked on an inclined treadmill (15 %) at 5 km h(-1) and 5 % of body weight was added every 3 min until exhaustion. At volitional termination no significant differences were found between the powered and unpowered condition for blood lactate concentration (respectively, 7.93 +/- A 2.49; 8.14 +/- A 2.24 mmol L-1), heart rate (respectively, 190.00 +/- A 6.50; 191.78 +/- A 6.50 bpm), Borg score (respectively, 18.57 +/- A 0.79; 18.93 +/- A 0.73) and peak (respectively, 40.55 +/- A 2.78; 40.55 +/- A 3.05 ml min(-1) kg(-1)). Thus, subjects were able to reach the same (near) maximal effort in both conditions. However, subjects continued the exercise test longer in the powered condition and carried 7.07 +/- A 3.34 kg more weight because of the assistance of the exoskeleton. Our results show that plantarflexion assistance during push-off can increase walking performance during a maximal exercise test as subjects were able to carry more weight. This emphasizes the importance of acting on the ankle joint in assistive devices and the potential of simple ankle-foot exoskeletons for reducing metabolic power and increasing weight carrying capability, even during maximal intensities

Interaction of external, introjected, and identified regulation with intrinsic motivation in exercise: Relationships with exercise enjoyment

The present study examined the way in which the exercise-related motives of external regulation, introjected regulation, and identified regulation interacted with intrinsic motivation to relate to exercise enjoyment. The study was conducted to test the "additive relationship hypothesis" emanating from Vallerand and Fortier's (1998) theoretical position regarding the interplay between extrinsic and intrinsic motivation in exercise. Exercise participants (N = 516) responded to a self-report questionnaire assessing their reasons for exercise participation before the commencement of a single exercise class. One week later, and immediately prior to the corresponding class, participants reported on their levels of exercise enjoyment. Interactional analyses using linear regression showed a significant interaction between identified regulation and intrinsic motivation. Specifically, the coexistence of high levels of identified regulation with high levels of intrinsic motivation corresponded with higher scores on exercise enjoyment. External regulation and introjected regulation did not interact with intrinsic motivation, thus supporting the research hypotheses. Collectively, the present findings supported the validity of Vallerand and Fortier's theoretical propositions in the exercise domain and specifically the additive relationship hypothesis between identified regulation and intrinsic motivation with respect to exercise enjoyment