OBJECTIVE To analyze associations between health-related physical fitness and the anthropometric and demographic indicators of children at three elementary schools in Botucatu, SP, Brazil. METHODS The sample for this cross-sectional study was 988 elementary school students, recruited from the second to ninth grades (an age range of 7 to 15 years). The children underwent anthropometric assessm...

Larvae of the anurans Rana berlandieri and Xenopus laevis have lungs and can breathe air as well as irrigate buccal and pharyngeal surfaces for aquatic respiration. Larvae of Bufo americanus lack lungs until just before metamorphosis and are obligately aquatic. We examined the relationship between the locomotor stamina (time to fatigue), aquatic oxygen concentration, body size, and respiratory ...

We examined heritabilities and correlations among measures of locomotor performance (speed, stamina) and among possible morphometric determinants of performance (hindlimb span, tail length) in families of hatchling lizards (Sceloporus occidentalis). We were particularly interested in determining whether these traits were heritable and thus might potentially respond genetically to selection. Mor...

The emmetropes and myopes were reported to have different monocular accommodative stamina at distance, but not at near. The purpose of this study was to further investigate the binocular accommodative stamina under natural binocular viewing condition. Methods: Accommodative stamina of 40 young university students was investigated over one-minute duration with a ±2.00 D lens flipper at 40 cm. Th...

We examined correlates (sex, size, age) of variation in maximal burst speed (racetrack) and in stamina (time until exhaustion at 0.5 km . h-1) in twopopulations of the iguanid lizard Sceloporus merriami in Big Bend National Park, Texas. Because these populations were known demographically and were studied in several years, we were able to examine the effects of adult age on performance, the bet...

Hatchling lizards (Sceloporus occidentalis) from a southern population are large and have high locomotor performance (speed and stamina) relative to hatchlings from northern populations. In order to determine whether differences in performance are an allometric consequence of interpopulation differences in size, yolk was removed from southern eggs, thereby producing miniaturized hatchlings equi...

Personal navigation systems have experienced a rising interest in the past few years thanks to the ever-increasing ubiquity of smartphones and in-car navigation systems. In their simplest forms, the goal is to calculate routes that are optimized with respect to criteria such as travel time and distance. Various systems have been proposed that allow for additional dynamic aspects to be included ...