ISSN:0883-9212    

出版商:OVID    

年代:1992

数据来源: OVID

ISSN:0883-9212    

出版商:OVID    

年代:1992

数据来源: OVID

摘要:

Cardiorespiratory responses to three modes of air-braked ergometry were compared in nine stable patients with cardiac disease (&OV0335; ± standard deviation [SD]: age, 63.7 ± 6.2 years of age; height, 172.2 ± 4.0 cm; weight, 75.8 ± 14.4 kg). Exercise modes included arm ergometry (AE), leg ergometry (LE), and combined arm and leg ergometry (ALE). A discontinuous protocol was selected with 3 minutes of exercise and 1 minute of recovery. Work loads were increased 0.5 kiloponds (kp) per stage. Tests were conducted to volitional fatigue. A two-way repeated analysis of variance (ANOVA) was used to determine significance between the exercise modes. Actual vs American College of Sports Medicine (ACSM) predicted oxygen uptake (VO2) values were evaluated by ANOVA to determine accuracy of predicted values. Heart rate (P < 0.05), minute ventilation (VE) (P < 0.001) ventiatory equivalents for oxygen (O2) (P < 0.001) and carbon dioxide (CO2) (P2) were significantly higher (P < 0.05) for AE than either LE or ALE at work loads of 1.0, 1.5, and 2.0 kp. Oxygen uptake (P < 0.05) and CO2production (VCO2) (P < 0.01) were significantly elevated during AE, and this reflected a significantly elevated respiratory exchange ratio (RER) (P < 0.001). Mechanical efficiency (ME) was lower during AE compared with LE or ALE. Average maximal work loads for AE were 57% lower than for either LE or ALE. This was associated with a 14% lower value for VE, 18% lower value for VO2, 25% lower value for calculated metabolic equivalents (METS), and a 27% lower value for ME. For all exercise modes, actual VO2values were compared with the ACSM predicted VO2values The ACSM equation for AE significantly overpredicted VO2at 1.5 to 2.5 kp work loads. The LE equation tended to underpredict at low work loads (0.5 and 1.0 kp) and overpredicted VO2at the higher work loads (2.5 kp and greater). The results of this study suggested that in this population of patients with cardiac disease, AE is conducted at a higher cardiorespiratory cost than LE or ALE. The use of ACSM prediction equations warrants additional study regarding this type of lever-action upper-body exercise.

ISSN:0883-9212    

出版商:OVID    

年代:1992

数据来源: OVID

摘要:

This study compared the responses of walking with 2.5-lb ankle weights (AW) and wrist weights (WW) to no additional weight (WN) in 16 patients in a Phase III and IV cardiac rehabilitation program (mean patient age, 59.3 years of age). After a practice session, each subject completed 8-minute trials on the treadmill with NW, AW, and WW. Each trial was conducted at an identical speed and grade in a randomized order. Heart rate (HR), systolic blood pressure (SBP), diastolic blood pressure (DBP), oxygen uptake (VO2), and electrocardiographic responses were measured every 2 minutes. The addition of AW and WW significantly (P < 0.05) increased HR responses by 4 and 13 beats /min, respectively, when compared with walking with NW. Walking with WW also resulted in significant (P < 0.05) increases in SBP (16 mm Hg) and DBP (3 mm Hg) when compared with NW and AW. Blood pressure changes for AW were not significantly (P > 0.05) different from NW. Oxygen uptake significantly (P < 0.05) increased by 1.7 ml · kg−1· min−1for AW and by 3.5 mL · kg−1· min−1with WW when comared with NW. Calculated oxygen pulse (mL · O2/beat) indicated that a pressor response did not occur with the addition of AW or WW. There were no differences (P > 0.05) in the frequency of premature ventricular beats observed between trials. There were also no significant (P > 0.05) differences in ischemic responses between trials, as shown by the degree of ST depression in leads II, V1, and V5. It was concluded that AW and WW can be safely prescribed for Phase III and IV patients with cardiac disease as a method to increase the intensity of walking exercise.

ISSN:0883-9212    

出版商:OVID    

年代:1992

数据来源: OVID

摘要:

It has been suggested that patients with chronic obstructive pulmonary disease (COPD) often experience psychologic depression because of a loss of functional ability. According to this hypothesis, a rehabilitation program that improves function should reduce depression. A total of 119 patients with COPD were randomly assigned to a rehabilitation program or to an education control group. The rehabilitation program was designed to enhance physical functioning and performance of activities of daily living. The. education control group received only information without specific instruction or physical activity training. There was a significant improvement in exercise endurance and self-efficacy for the rehabilitation group compared with the education control group after treatment. However, there was not a significant reduction in depression in either group. Patients were then categorized according to increased or decreased depression between the initial assessment and post-treatment evaluation. Within the rehabilitation group, those who had a decrease in depression showed an increase in exercise endurance. Within the education control group, increase or decrease in depression was unrelated to change in exercise endurance. Correlational analyses showed significant associations between baseline measures of depression and functional status. The data are interpreted as partially supporting the functional view of depression in these patients.

ISSN:0883-9212    

出版商:OVID    

年代:1992

数据来源: OVID

摘要:

The relative benefits of dual chamber adaptive rate pacing (DDDR) were compared with ventricular adaptive rate pacing (VVIR) in patients with chronic obstructive pulmonary disease (COPD) who required pacing. Patients with normal lung function (NLF) served as a control group. Eleven patients were studied with a multistage treadmill exercise protocol in the DDDR and VVIR modes. All patients had symptomatic bradycardia, five patients had COPD, and six patients had NLF. Pulmonary gas exchange data was measured at rest and during exercise. Eclio-Doppler cardiac output determinations were made at rest and, immediately after exercise. Rest and exercise performance data in each mode were compared for the COPD and NLF populations. Both groups showed consistently better performance with DDDR, Cardiac output (CO) showed the greatest improvement, with an average adjusted CO at peak exercise of 8.09 L /min DDDR vs 5.73 L/min VVIR in the COPD group and 11.92 L/min DDDR vs 6.69 L/min VVIR for the NLF group. Although the relative degree of improvement differed between the two groups, both showed improved cardiac performance in DDDR mode at rest and during exercise. A delay in the onset of the anaerobic threshold (AT), combined with an increase of 15% in exercise duration in the COPD population, suggested that DDDR would aid in rehabilitation and improve quality of life in patients with COPD who require cardiac pacing.

ISSN:0883-9212    

出版商:OVID    

年代:1992

数据来源: OVID

ISSN:0883-9212    

出版商:OVID    

年代:1992

数据来源: OVID

ISSN:0883-9212    

出版商:OVID    

年代:1992

数据来源: OVID

ISSN:0883-9212    

出版商:OVID    

年代:1992

数据来源: OVID

ISSN:0883-9212    

出版商:OVID    

年代:1992

数据来源: OVID