Ventilation threshold and lactate threshold of 9-12 year-old boys and girls.
- VernacularTitle:９～１２歳男女児のＶｅｎｔｉｌａｔａｔｉｏｎ ＴｈｒｅｓｈｏｌｄとＬａｃｔａｔｅ Ｔｈｒｅｓｈｏｌｄ
- Author:
YORIKO YAMAMOTO
;
YORIKO ATOMI
;
HIDEO HATTA
- Publication Type:Journal Article
- From:Japanese Journal of Physical Fitness and Sports Medicine
1985;34(4):211-217
- CountryJapan
- Language:Japanese
-
Abstract:
Ventilation threshold (VET), threshold of decompensated metabolic acidosis (TDMA) and lactate threshold (LT1, LT2) were investigated during incremental bicycle exercise for 20 boys (11.7±0.1 years) and 10 girls (11.2±0.2 years) .
Maximum oxygen uptake (VO2max) was measured by treadmill running. There was significant difference between boys and girls in VO2max per body weight, but no signif-icant difference per LBM. Mean values of each threshold (% peak VO2) were as follows. VET was 53.3±2.2%, TDMA was 69.0±2.2%, LT1was 51.8±2.2% and LT2was 72.8±2.2%. These values were not higher than those of previous adult's data. There was no significant difference in lactate and ventilatory parameters between boys and girls, except LT2and LT4mM.
In conclusion, it seems that no difference is seen in lactate and ventilatory responses between 9-12 year boys and girls. VET and TDMA by bicycle exercise could be estimated by ventilatory responses in prepubertal children.
