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PubMed2006

[Cycling after operation for total hip or total knee replacement].

Relatively few elderly people used to practice intensive and competitive sports activities. Following operations on joints of the lower extremity, such as total hip or knee replacement, most patients decrease their physical activity. Sometimes they are even unable to walk without an assisting device. The activation of the hip joint articulation among cyclists is very restricted, since the pelvis does not have practically any mobility. Lowering of the pedal, which requires the more important effort, is carried out by the extensors of the hip, but especially by those of the knee as well as the foot flexors. In cycling, the load on the articulations of the hips is practically reduced, in spite of the great effort. The load placed by the body weight on the hip joint, even in ascents, is reduced during this exercise, though the risk of prosthesis loosening is apparently very small. Knee joints are much more engaged during biking, but it is still considered as low-impact sport, compared to weight-bearing activities such as jogging and even walking.

Arthroplasty, Replacement, Hip↗
PubMed1991

[Non-supervised home exercise programs in a convalescent phase of acute myocardial infarction: their effectiveness and the usefulness of the heart rate at the anaerobic threshold].

The effectiveness of 2 different exercise programs in the convalescent phase of acute myocardial infarction (AMI) was assessed. One hundred and five patients with AMI were enrolled for one of these 2 non-supervised home exercise programs immediately after discharge from the hospital. Before discharge and one month later, they underwent submaximal graded treadmill exercise tests with the application of expiratory gas analysis. All patients were assigned to perform 2 km of walk-jog exercise daily for one month. The heart rate during exercise, duration of exercise and the total steps during 24 hrs were measured. Eighty patients (group A) underwent the exercise program in which their heart rates were maintained at 100-110 beats/min during exercise; while 25 patients (group B) underwent the other program in which their heart rates were maintained at 90-100% of those obtained at their anaerobic threshold (AT). The ventilatory AT was calculated by the standard technique using the Horizon System. In group A, AT increased from 13.4 ml/min/kg to 15.1 ml/min/kg (p < 0.01) after the exercise program and in group B, from 12.8 ml/min/kg to 14.9 ml/min/kg (p < 0.01). In group B, AT increased in all patients, while it remained unchanged in 30% of the patients in group A (p < 0.01). In conclusion, a non-supervised home exercise program can be effective and easily instituted for rehabilitation in a convalescent phase of AMI. The program using 90-100% of the heart rates at the anaerobic threshold seemed to be more suitable for obtaining better effects on exercise tolerance than that using 100-110/min heart rate.

Aged↗
PubMed1991

The effect of exercise training on body weight and peptide hormone patterns in normal weight college-age men.

Resting and peak glucose, insulin, glucagon, gastric inhibitory polypeptide (GIP) and pancreatic polypeptide (PP) levels were evaluated pretraining, 3 weeks and 10 weeks posttraining in seven college age males. The exercise consisted of thrice weekly session of jogging at 70% VO2max for 20 minutes plus warmup and cool down. Following the 10 weeks, VO2max increased significantly. Body weight remained constant and body fat decreased significantly. Fasting and peak blood glucose levels were normal at the beginning of the study yet improved with training. As expected, fasting and peak insulin levels decreased significantly with training. Although GIP did not change significantly with training, an uncoupling of GIP and insulin peak responses was observed. Glucagon levels were essentially unchanged. Fasting and peak PP levels increased slightly as training occurred. These hormone responses suggest that perhaps body weight and/or changes in body fat stores and fuel use might influence peptide hormone responses with training.

Adult↗
PubMed1991

Effect of exercise on blood lipid constituents and aerobic capacity of fire fighters.

The effect of 32 weeks of exercise training, at moderate intensity, on serum lipids, lipoproteins, aerobic power, anaerobic threshold, body composition, and coronary heart disease (CHD) risk factors was examined in 38 male fire fighters (mean +/- SD 42.7 +/- 6.4 yr). Exercise training included cycling, rowing, walking, jogging, running, and circuit weight training 3 d/wk, 30 min/session at 350 to 450 kcal/session. Fasting blood samples collected pre- and post-training were assayed for triglyceride (TG), total cholesterol (CHOL), low-density lipoprotein cholesterol (LDL-C), very low-density lipoprotein cholesterol (VLDL-C), and high-density lipoprotein (HDL-C). Maximum aerobic power (VO2max) was measured during a treadmill test. Anaerobic threshold (AT) was predicted by observing the onset of a systematic increase in VE/VO2 without a concomitant increase in VE/VCO2. Body composition was determined via underwater weighing and skinfold measurements. There were no significant differences in CHOL, CHOL/HDL-C ratio, or LDL-C/HDL-C ratio. Only the AT, HDL-C, VO2max, and CHD risk levels changed significantly (P less than 0.05). Cholesterol, LDL-C, VLDL-C and triglycerides were linearly related to body fat. Maximal oxygen uptake and HDL-C were inversely related to body fat. It was concluded that moderate exercise intensity can yield a marked increase in AT, VO2max, and HDL-C while not significantly affecting the CHOL level. The findings lend support to the contention that risk reduction for CHD lies on a continuum.

Adult↗
PubMed1991

Exercise training, serum lipids, and lipoprotein particles: is there a change threshold?

The role of lipoprotein manipulation in the treatment of atherosclerosis is well established. Improvement in lipoprotein cholesterol concentrations and subclass distribution through exercise training is often advised prior to pharmacologic intervention. As with other therapeutic interventions, dose must be stipulated to the patient. The dose of exercise training required to induce beneficial lipoprotein changes is unclear. This issue is further complicated by the potential effect of exercise training on lipoprotein subclass distribution (LDL I, LDL II, LDL III, LDL IV, HDL2a, HDL2b, HDL3a, HDL3b, HDL3c), enzymes, apoproteins, and transfer proteins and by the changes in diet and body composition that often accompany exercise training. These changes may be responsible for all or part of the lipoprotein change attributed to exercise. From available data, it appears that a threshold of approximately 15 miles.wk(-1) of jogging may be required to induce beneficial change.

Arteriosclerosis↗
PubMed1991

[Special aspects of physical training during the rehabilitation stage of coronary patients].

Practical aspects: Physical exercise is a basic component of the rehabilitation program for patients recuperating from myocardial infarction or bypass surgery. The aim of exercise is to enhance physical performance by improving coordination, flexibility, strength, speed and endurance. The training concept is matched to the individual capability, which is determined by an exercise test at the beginning of the rehabilitation program. On the basis of this test, an "exercise heart rate" is calculated with the aim of protecting the patient from overstrenuous activity. Depending on their physical fitness, the patients are divided into two groups: those with a capability of less, and those with a capability of more than 1 watt/kg. Most elderly patients are no longer active participants in sports, so that guidance through flexibility and coordination exercise is offered. Usually, patients perform a daily program of 15 minutes of physical activity in their individual groups, and spend 45 minutes walking and relaxing. In addition, they have opportunities for swimming, jogging and cycling. Decreased left-ventricular function: The effects of a four-week training program in myocardial infarction (MI) patients with moderate-to-severe left-ventricular dysfunction were investigated in two distinct studies. In neither study was a deterioration in the ejection fraction at rest or during exercise observed. In the second study, an additional parameter was provided by the Swan-Ganz catheter. Neither pulmonary wedge pressure (PWP) nor cardiac output indicated any deterioration in response to dosed training. However, in this second study, four patients in the training group with a resting ejection fraction (EF) less than 30% developed complications. All these patients had a pathological PWP at rest. Nevertheless, five patients with an EF less than 30% but with a normal PWP at rest completed the training program without complications. The long-term prognosis for training post-MI patients with severe left-ventricular dysfunction would appear to be no worse than for controls. Results of the first study: During the four-week training program, no complications occurred. No major changes in the EF at rest and during training were seen. In the training group the EF at rest increased slightly to 40 +/- 10%. The EF during exercise improved to 39 +/- 10%. Delta EF showed a decrease of 3 +/- 8%. After the four-week training period the decrease was 1 +/- 9%. In the control group, a major increase in the EF at rest to 41 +/- 10% was seen. The EF during exercise, however, showed only a small increase to 43 +/- 15%.(ABSTRACT TRUNCATED AT 400 WORDS)

Coronary Disease↗
PubMed1991

Factors associated with leukocyturia in asymptomatic pilots.

We attempted to relate the prevalence of leukocyturia during annual examinations to recent activities and history data in 923 pilots. Urinary analysis was done and the results cross-tabulated with answers from a questionnaire and with a past history of leukocyturia obtained from the pilot's chart. The prevalence of 4 to 6 or more white blood cells (WBCs) in the urinary sediment was 5.3%. Leukocyturia was 35.7 times more common (odds ratio) in those with a previous history of leukocyturia and a concomitant history of urethritis (p less than 0.0001). Yet, a history of leukocyturia accounted for only 18.1% of the cases of leukocyturia. There was a trend for an association between jogging and leukocyturia. The prevalence of leukocyturia was not affected by smoking, other physical exercise, a history of nephrolithiasis, air duty in the preceding 24 h or a history of transient illness during the last 2 weeks. We conclude that there is an association between a history of both leukocyturia and urethritis and leukocyturia. In most cases, however none of the variables tested were found to be associated with leukocyturia.

Aerospace Medicine↗
PubMed1990

Body composition alterations consequent to an exercise program for pre and postmenopausal women.

The purposes of this study were: (a) to evaluate the effects of an exercise program upon the body composition of premenopausal (no. 43) and postmenopausal (no. 66) women, aged 35-70 years, and (b) to compare exercise Ss with age matched control Ss. Body composition was assessed by skinfold measurement and hydrostatic weighing. Exercise Ss walked or jogged and performed light resistive exercise for 60 minutes per day three times per week for 24 weeks. Control Ss remained sedentary. ANOVAs revealed: (a) no significant (p greater than or equal to .05) differences in exercise training effects between premenopausal and postmenopausal Ss, and (b) exercise Ss exhibited less body fatness while control Ss possessed more body fat as represented by significant changes (p less than or equal to .05) for the exercise and control Ss, respectively in: body density (+.002 g/cc, -.001 g/cc); % fat (-1.2%, +.6%); fat weight (-.4 kg, +1.1 kg); suprailiac skinfold (-.3 mm, +7 mm); and abdominal skinfold (-.3 mm, +1.5 mm). It was concluded that: (a) menopausal status did not alter the effects of exercise in this study, and (b) exercise training produced a positive effect in the exercise Ss by reversing body composition trends associated with a sedentary lifestyle.

Adipose Tissue↗
PubMed1990

Thoracic succussion splash: a new symptom and sign of achalasia.

A patient with a "thoracic succussion splash" due to achalasia is described. She noted a splashing or sloshing sensation in her chest related to jogging and bending. On examination a splashing sound could be heard over the mid sternum and the posterior chest when the patient was rocked vigorously back and forth.

Adult↗
PubMed1979

Moderate exercise and high-density lipoprotein-cholesterol. Observations during a cardiac rehabilitation program.

The effects of a 13-week moderate exercise program on fasting plasma insulin, lipids, and lipoprotein cholesterol concentrations were studied in 32 sedentary, middle-aged men with coronary artery disease. The preponderant component of the exercise program was walking or slow jogging. There was no significant change in the systolic blood pressure and pulse rate product response to a standard exercise load. The high-density lipoprotein-cholesterol (HDL-C) level increased, and the fasting plasma insulin concentration decreased. There were no significant changes in plasma triglycerides or low-density lipoprotein cholesterol levels. In sedentary subjects with coronary artery disease, a modest increase in activity can result in an increase in the HDL-C level and a decrease in the plasma insulin concentration. These changes occurred in the absence of variations in diet, smoking habits, adiposity, or plasma triglyceride concentrations and did not require a cardiovascular training effect.

Adult↗
PubMed1990

Effect of an exercise program on the perception of exertion in males at retirement.

To describe the association between perception of exertion and exercise, 138 men at retirement, mean age 62.7 years, were studied before and after a one-year program of exercise. VO2max and ratings of perceived exertion (RPE) using the Borg psychophysical scale were determined by a continuous exercise treadmill protocol to fatigue. The men were randomly assigned to an exercise program (n = 69) or control (n = 69). The program consisted of walking or jogging for 30 min, 3 times per week for one year. After training, the activity group showed a significant improvement in VO2max (12%). Linear regression analysis was used to relate RPE to selected physiological measurements for control and activity groups. The equations for the before and after training relationships were compared. Changes in the relationship of RPE vs VO2 and Ve, after training, were not significant for the activity group. However, the control group showed significant changes in these relationships at one year post retirement. For VO2 and Ve, ratings were 1-2 units higher than at time of retirement. Results indicate that perception of a physical task normally changes at retirement such that a given amount of exertion may seem subjectively greater. Results also suggest that a structured exercise program is successful at maintaining perception of task at pre-retirement levels. This maintenance of a low rating of perception may retard a reluctance to be physically active which often accompanies ageing.

Aged↗
PubMed1990

Relationship between the starting age of training and physical fitness in old age.

The purpose of this study was to test the hypothesis that older persons can minimize the reduction in physical fitness with aging if they start training before approximately 50 years of age, beyond which strength decline has been reported to become more pronounced. Maximal values for isometric strength, dynamic strength and speed of movement of the biceps brachii and quadriceps muscles, back-lift strength, and predicted oxygen uptake (VO2max = VO2max) were measured in 39 male subjects who were 60-68 years old. Four groups were studied: T26, T45, T56, and untrained. The T26 group had been training (jogging 10 km.day-1, 5 days.wk-1 at 10 km.h-1) since before their mid-thirties (mean 26 years), the T45 group since their forties (mean 45 years), the T56 group since their fifties (mean 56 years), and the untrained group had never taken part in any systematic training. Collectively, the T26 and T45 groups had significantly (p less than 0.05) higher values for muscle strength, speed of contraction, and VO2max than the T56 and/or untrained group(s). However, no differences were observed between the T26 and T45 groups. The results support a relation between the starting age of training and the age-dependent decline of physical fitness. Thus, the hypothesis is accepted.

Adult↗
PubMed1990

The effect of weight loss by dieting or exercise on resting metabolic rate in overweight men.

While resting metabolic rate (RMR) is known to decline during periods of energy restriction, the effect of exercise training during weight loss on RMR is less clear. We studied separately the effect of energy restriction and exercise training on weight loss and RMR in a one-year randomized, controlled trial. One hundred twenty-one overweight, sedentary men (age 30-59) who were randomly assigned to a control (C), energy restriction only (D), or exercise only (E) group were examined at baseline and after one year for changes in RMR as measured by standard indirect calorimetry. Relative to controls, E increased fitness and jogged an average of 9.97 +/- 5.6 miles/week and did not change energy intake while D significantly reduced energy consumption. Both groups achieved significant weight loss and fat mass loss when compared to the controls at the end of one year. After one year, the D group showed a small yet significant decline in RMR (kcal/h and kcal/FFM/h) when compared to controls and exercisers, while the E group showed no significant changes. Therefore, in moderately overweight men, a one-year program of weight loss by energy restriction produced a significant decline in RMR while weight loss by exercise did not change RMR.

Adult↗
PubMed1990

Coronary risk factors in type II diabetes: response to low-intensity aerobic exercise.

Patients with non-insulin-dependent diabetes are at greatly increased risk for coronary artery disease. Although exercise training has been shown to decrease risk factors, the presence of obesity, older age, and a sedentary lifestyle make a high-intensity exercise program an unrealistic choice of therapy. Therefore, we examined the effect of a low-to-moderate-intensity (mean 69 per cent of maximal heart rate) walking program on lipids, glucose, insulin, glycosylated hemoglobin and cardiovascular fitness. Nine women and seven men, mean age 56, were randomly assigned to a control or an exercise group which exercised three times per week for two months. Supervised exercise sessions consisted of 40-45 minutes of walking and/or slow jogging. Subjects continued on their usual diets. The trained group showed a significant improvement in VO2max from 1.65 to 1.95 L/min. Resting systolic blood pressure decreased from 141 to 130 mm Hg after training, and resting heart rate decreased from 88 to 81. Glycosylated hemoglobin decreased in the exercise group in seven or eight subjects and in only two of eight controls. Triglycerides decreased in the exercise group from 285 to 223 mg/dl. Body weight, total and HDL cholesterol, glucose, and insulin did not change in either group. These data indicate that a low-to-moderate level of aerobic training, independent of dietary changes, is an effective and feasible method of improving cardiovascular risk factors: physical fitness, systolic blood pressure, plasma triglycerides, and glycemic control in non-insulin-dependent diabetic subjects.

Aged↗
PubMed1990

Physical fitness in relation to amount of physical exercise, body image, and locus of control among college men and women.

The relations of amount of exercise, body image, and locus of control to physical fitness were investigated. The Hall Physical Fitness Test Profile, the Winstead and Cash Body Self-relations Questionnaire, and the Nowicki-Strickland Locus of Control Scale were administered to 243 freshmen. Students estimated the amount of time spent exercising on a 9-point scale ranging from no regular exercise to 10 or more hours per week for the preceding three months. Exercise included brisk walking, jogging, aerobics, and sports activities like soccer, tennis, and swimming. Increased fitness was associated with increased amounts of exercise, internal locus of control, and good body image. There was a statistically significant interaction between sex and amount of exercise. For students who exercised 2-4.9 hours per week, men were more fit than women. Fitness was comparable for men and women exercising less than two hours or at least five hours per week. Women had to exercise 5 or more hours weekly to achieve the fitness level of men who exercised 2 to 4.9 hours per week.

Adolescent↗
PubMed1990

[Experience of expandable metallic stent for tuberculosis bronchial stenosis].

A 41-year-old female who had suffered from a severe left main bronchial stenosis due to bronchial tuberculosis was treated by implantation of self-expandable metallic stent after dilating the stenosis by balloon catheter. After placing the stent symptoms such as dyspnea were disappeared completely. Four months later, the patient can tolerate to do jogging.

Adult↗
PubMed1990

Aerobic capacity of older adults: a training study.

The effects of a four month aerobic conditioning program on heart rate, blood pressure, maximal oxygen consumption (VO2max), and physical work capacity of 55-70 year old sedentary individuals were evaluated. Twenty-eight men and women participated in either 4 months of supervised fast walking or jogging at a prescribed target heart rate or stretching exercises for one hour, three days per week. Gains in VO2max (ml/kg/min) obtained during a Balke maximal treadmill test in aerobic and exercise control subjects were 27% and 9%, respectively. At posttesting subjects in both groups demonstrated improved maximal work rate, increased treadmill time, and experienced lower resting and recovery heart rates, lower resting systolic blood pressure, and fewer premature ventricular depolarizations during exercise testing. In 67 physician-supervised maximal exercise tests, only one subject did not achieve VO2max due to exercise induced arrhythmias. No events of morbidity or mortality occurred as a result of the exercise testing and training. Subjects were contacted 4 years after study participation to determine if they were adhering to an exercise program. Sixty-four percent reported exercising at least 3 days per week in large muscle activities. We conclude that four months of supervised aerobic and nonaerobic exercise training is sufficient to improve aerobic capacity and other indicators of fitness in older, sedentary men and women, and that these previously sedentary people are likely to continue exercising on an individual basis once they have experienced improved physical capacity.

Aged↗
PubMed1989

Effect of endurance training on gross energy expenditure during exercise.

We compared the effect of endurance exercise training on gross energy expenditure (GEE) during steady-state exercise in 20 younger men (31.2 +/- 0.6 years) and 20 middle-aged men (49.2 +/- 1.1 years). The subjects trained for eight months. The training program consisted of three 45-min walking and jogging exercise sessions per week at an intensity of approximately 60-85% of the heart rate at peak VO2. We administered bicycle ergometer tests at 0, 4, and 8 months into training. Participants exercised at a power output of 100 W for 10 min using a pedaling frequency of 50 rpm. We determined GEE (kcal/min) by measuring the oxygen consumption and respiratory exchange ratio. We found a significant reduction (p less than 0.05) in GEE (0.7-1.3 kcal/min) following 4 months of endurance training in both age groups, with a further reduction (p less than 0.05) noted in only the middle-aged group at month 8. We found no difference (p greater than 0.05) in GEE between the younger and middle-aged men. We conclude that chronic exercise may modify GEE during a submaximal exercise bout and that this adaptation is similar in magnitude in younger and middle-aged men.

Adult↗