ACCURACY OF PERCEIVED TRAINING HEART RATES IN OUTPATIENT CARDIAC REHABILITATION: RELATION TO SUBJECTIVE RATINGS OF EXERTION.

Heart rate has been reported to increase during nausea and has therefore been used as an indicator of motion sickness. However, the relationship between heart rate and subjective ratings of motion sickness has received little attention, and the autonomic origins of any increase in heart rate during motion sickness are unknown. Spectral analysis of heart rate variability can quantify the degree of sympathetic and parasympathetic stimulation of the heart, as reflected by the low frequency (LF) power and high frequency (HF) power components, and the ratio of LF:HF power (“autonomic balance”). This experiment investigated changes in heart rate and heart rate variability prior to and during the development of nausea. Forty subjects (20 male, 20 female) sat within an optokinetic drum (a visual stimulus) rotating at 5 rpm for a maximum of 32 minutes. Heart rates, measures of heart rate variability, and ratings of sickness were recorded during a resting pre-exposure period and during optokinetic stimulation. Heart rates increased significantly with increasing subjective ratings of sickness (P < .001). This appeared to be attributable to a net increase in sympathetic stimulation of the heart, (P < .05). Sickness ratings were greater for females than males (P = .09), consistent with a significantly greater history of motion sickness reported by females than males over the previous 12 months (P < .02). The findings suggest that a simple measure of heart rate may be a useful indicator of small changes in the degree of sickness that can be of interest in motion sickness research.

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What are we measuring? Considerations on subjective ratings of perceived exertion in obese patients for exercise prescription in cardiac rehabilitation programs

International Journal of Cardiology ◽

10.1016/j.ijcard.2008.11.068 ◽

2010 ◽

Vol 140 (2) ◽

pp. 236-238 ◽

Cited By ~ 10

Author(s):

Luca Alessandro Gondoni ◽

Ferruccio Nibbio ◽

Giulia Caetani ◽

Giovanni Augello ◽

Anna Maria Titon

Keyword(s):

Cardiac Rehabilitation ◽

Perceived Exertion ◽

Exercise Prescription ◽

Obese Patients ◽

Subjective Ratings ◽

Ratings Of Perceived Exertion ◽

Rehabilitation Programs

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3: 45 p.m.: DEMONSTRATION OF BENEFICIAL EFFECTS OF CARDIAC REHABILITATION AND CARDIOVASCULAR TRAINING RESPONSE IN PATIENTS WITH FIXED HEART RATES

Medicine & Science in Sports & Exercise ◽

10.1249/00005768-198101320-00347 ◽

1981 ◽

Vol 13 (2) ◽

pp. 138

Author(s):

H. Robert Superko

Keyword(s):

Cardiac Rehabilitation ◽

Heart Rates ◽

Beneficial Effects ◽

Training Response ◽

Cardiovascular Training

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Relationships Between Subjective Ratings and Objective Measures of Performance in Speechreading Sentences

Journal of Speech Language and Hearing Research ◽

10.1044/jslhr.4004.900 ◽

1997 ◽

Vol 40 (4) ◽

pp. 900-911 ◽

Cited By ~ 6

Author(s):

Marilyn E. Demorest ◽

Lynne E. Bernstein

Keyword(s):

Hearing Impairment ◽

Performance Evaluations ◽

Objective Measures ◽

Large Individual ◽

Subjective Ratings ◽

Objective Performance ◽

Phonetic Distance ◽

Stimulus Length ◽

Measures Of Performance ◽

Confidence Scale

Ninety-six participants with normal hearing and 63 with severe-to-profound hearing impairment viewed 100 CID Sentences (Davis & Silverman, 1970) and 100 B-E Sentences (Bernstein & Eberhardt, 1986b). Objective measures included words correct, phonemes correct, and visual-phonetic distance between the stimulus and response. Subjective ratings were made on a 7-point confidence scale. Magnitude of validity coefficients ranged from .34 to .76 across materials, measures, and groups. Participants with hearing impairment had higher levels of objective performance, higher subjective ratings, and higher validity coefficients, although there were large individual differences. Regression analyses revealed that subjective ratings are predictable from stimulus length, response length, and objective performance. The ability of speechreaders to make valid performance evaluations was interpreted in terms of contemporary word recognition models.

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