ISSN:
1439-6327
Keywords:
Exercise
;
Children
;
Physiological evaluation
;
Lactate threshold
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Abstract The purpose of this study was to determine the anaerobic threshold of children by the analysis of saliva collected during field tests. A group of 25 children (mean age, 10.5 years) performed an incremental exercise test on a track, consisting of 4-min stages at increasing running velocities. Before each test (at rest) and at the end of each stage, both blood (via finger pricks) and saliva samples (for measurement of salivary concentrations of Na+ and Cl−) were collected to determine lactate threshold (Th1a-) and saliva threshold (Thsa), respectively. There were no significant differences between values of Th1a- and Thsa when expressed either as running velocity [mean Th1a-, 10.73 (SD 1.96) km · h−1; mean Thsa, 10.89 (SD 1.69) km · h−1] or heart rate [Th1a-, 182(SD 14) beats · min−1 Thsa 183 (SD 11) beats · min−1]. In addition, correlations between Thsa and Th1a were high, when both values were expressed as running velocity in kilometres per hour (r = 0.89;P 〈 0.001), or heart rate in beats per minute (r = 0.90;P 〈 0.001). In conclusion, these findings suggested that saliva analysis would be a valid method for anaerobic threshold determination in field tests.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00634384
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