摘要:

The purpose of this study was to compare the ECG response during land, based (LB) and. water based (WB) exercise rehabilitation of cardiac patients. Thirty-seven patients (&OV0335; age = 55.6 ± 5.0 yrs; 19 Myocardial Infarction; 4 Coronary Bypass Surgery; 5 Angina; 5 Silent Ischemia; 4 Other) completed a maximal exercise test (GXT) (X HRmax= 132 ± 23 bpm; &OV0335; BPmax= 170/85 ± 21/19 mmHg;&OV0335; functional capacity = 9 Mets) and participated in both the LB and WB exercise programs. Both LB and WB were designed to use varying arm and leg exercises eliciting a heart rate response of 70–85% of attained HR max for 40–50 minutes, excluding warm-up and cool down. The ECG was continuously monitored by telemetry during LB and WB, and evaluated for arrhythmias and ST changes. The mean exercise HR was 98 ± 15 bpm and 104 ±17 bpm during LB and swimming WB respectively, which was not significantly different (P > 0.05). Significant ST segment depression was present in 14 subjects during the GXT (38%) and in seven subjects (19%) during both LB and WB (Chi-Square = 4.7; P > 0.05). Ectopy was present in nine (24%) subjects during the GXT and in 14 (38%) and two (5%) subjects during LB and WB respectively (Chi-Square = 11.3; P < 0.01). Thus, WB elicited significantly less ectopy than seen either during LB or GXT but with similar amounts of ST segment depression. Consequently, WB appears to be a safe alternative to LB for cardiac rehabilitation.

ISSN:0883-9212    

出版商:OVID    

年代:1990

数据来源: OVID

ISSN:0883-9212    

出版商:OVID    

年代:1990

数据来源: OVID

摘要:

We examined estimates of &OV0312;O2maxfrom treadmill time, &OV0312;O2submaxfrom treadmill speed and grade, and the % &OV0312;O2max: %HRmaxrelationship in patients receiving (N = 60) or not receiving (N = 72) beta blocking medication (propranolol equivalent of 98 ± 79 mg · day-1). Subjects completed a standard Bruce treadmill test to sign or symptom end points while using handrail support. Significant correlations between measured and estimated &OV0312;O2submaxwere found for patients both off (r = 0.76) and on (r = 0.67) medication. Significant mean differences (T <0.05) did not exceed 0.5 ml · kg-1· min-1. Correlations for the linear relationship between % &OV0312;O2maxand % HRmaxfor patients off(r = .86) and on (r = .87) medication were also significant. An ANOVA showed no significant difference in &OV0312;O2maxbetween patients off or on beta blockers or between measured and estimated values. We conclude that (1) estimation of &OV0312;O2maxis not hindered by beta blocking medication; (2) patients on beta blocking medication have similar submaximal energy expenditures; and (3) the relationship of % &OV0312;O2max: %HRmaxis similar in patients receiving or not receiving beta blockers.

ISSN:0883-9212    

出版商:OVID    

年代:1990

数据来源: OVID

摘要:

This investigation used perceptions of effort (PE) to replicate exercise bouts of low (L), moderate (M), and high (H) intensities. Thirty men (18–25 years) were divided into three groups: Practice with Feedback (PF); Practice without Feedback (PWOF); and Control (C). Four treadmill (TM) trials (T1, T2, T3, T4) were used with supervised TM practice between T2 and T3 and supervised field exercise between T3 and T4. At T1, subjects exercised on a TM at L, M, and H intensities and assigned a perceptual rating to each, using a Borg RPE scale (6–20). For T2, T3, and T4, subjects adjusted the speed of the TM to replicate feelings at T1. Results for the percent inaccuracy scores (%IS) for speed (averaged over intensities) at T2 were: PF = 12.2%; PWOF = 16.1%; C = 14%. Practice with feedback and PWOF reduced %IS by 4.5% at T3, while C increased %IS by 4.5% (P > 0.05). All three groups retained the T3 level of inaccuracy at T4. HR and &OV0312;O2responses to replicated speeds were more accurate at M and H on all trials (P > 0.05). Subjects more accurately reproduced speed using PE after practice for all exercise intensities.

ISSN:0883-9212    

出版商:OVID    

年代:1990

数据来源: OVID

ISSN:0883-9212    

出版商:OVID    

年代:1990

数据来源: OVID