ABSTRACT
This study cross-validated statistical models for prediction of peak oxygen consumption using ratings of perceived exertion from the Adult OMNI Cycle Scale of Perceived Exertion. 74 participants (men: n=36; women: n=38) completed a graded cycle exercise test. Ratings of perceived exertion for the overall body, legs, and chest/breathing were recorded each test stage and entered into previously developed 3-stage peak oxygen consumption prediction models. There were no significant differences (p>0.05) between measured and predicted peak oxygen consumption from ratings of perceived exertion for the overall body, legs, and chest/breathing within men (mean±standard deviation: 3.16±0.52 vs. 2.92±0.33 vs. 2.90±0.29 vs. 2.90±0.26 L·min(-1)) and women (2.17±0.29 vs. 2.02±0.22 vs. 2.03±0.19 vs. 2.01±0.19 L·min(-1)) participants. Previously developed statistical models for prediction of peak oxygen consumption based on subpeak OMNI ratings of perceived exertion responses were similar to measured peak oxygen consumption in a separate group of participants. These findings provide practical implications for the use of the original statistical models in standard health-fitness settings.
Subject(s)
Bicycling/physiology , Models, Statistical , Oxygen Consumption/physiology , Physical Exertion/physiology , Adolescent , Adult , Cross-Sectional Studies , Exercise Test , Female , Humans , Male , Perception , Young AdultABSTRACT
Direct kinematic observation was used to measure ratings of perceived exertion at the ventilatory breakpoint (RPE-Vpt) in 10- to 14-yr.-old girls (n=22) and boys (n=22). RPE for the overall body, legs, and chest were simultaneously estimated by a trained observer and self-rated by a subject during treadmill exercise using the Children's OMNI-Walk/Run Scale. Subjects' heart rate and oxygen consumption were measured during each minute of exercise. Vpt for the girls and boys, respectively, were 64.2 and 66.5% VO2 max. RPE-Vpt ranged from 6.0 to 6.5 Overall, 7.1 to 7.6 Legs, and 5.0 to 5.5 Chest for both the observation and self-rating procedures. Responses indicated (a) RPE-Vpt (Overall, Legs, Chest) did not differ (p>.05) between the observer and self-rating procedures and (b) Observer RPE-Vpt-Legs was greater (p<.05) than RPE-Vpt-Chest. Findings validated direct kinematic observation to code group-normalized RPE-Vpt for girls and boys performing treadmill exercise.
Subject(s)
Biomechanical Phenomena/methods , Child Behavior/physiology , Perception/physiology , Physical Exertion/physiology , Respiratory Physiological Phenomena , Adolescent , Child , Exercise Test/statistics & numerical data , Female , Heart Rate/physiology , Humans , Leg/physiology , Male , Oxygen Consumption/physiology , Pulmonary Ventilation/physiology , Thorax/physiologySubject(s)
Conjunctivitis, Bacterial/epidemiology , Disease Outbreaks , Pneumococcal Infections/epidemiology , Adolescent , Adult , Child , Child, Preschool , Conjunctivitis, Bacterial/microbiology , Conjunctivitis, Bacterial/prevention & control , Humans , Infant , Middle Aged , Pneumococcal Infections/microbiology , Pneumococcal Infections/prevention & control , Rural Population , Saskatchewan , Serotyping , Streptococcus pneumoniae/classificationABSTRACT
Relationship between the data on hybridization of the cloned sequences of the satellite DNA III located in the short arm of the acrocentric chromosomes and the hybridization data on the cloned fragments of 28S and 18S rRNA genes, as well as the transcriptional activity of human nucleolus organizer was studied. Negative correlation between the content of the satellite DNA III and the number or expression of rRNA genes was shown.
