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Volume 38 (1989)
- Issue 6 Pages 219-
- Issue 5 Pages 167-
- Issue 4 Pages 133-
- Issue 3 Pages 85-
- Issue 2 Pages 55-
- Issue 1 Pages 1-
Volume 38, Issue 3
Displaying 1-5 of 5 articles from this issue
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TAKEHIKO FUJISE, TETSURO TAMAKI, TAMOTSU TERAO, SHOICHI NAKANO1989 Volume 38 Issue 3 Pages 85-94
Published: June 01, 1989
Released on J-STAGE: September 30, 2010
JOURNAL FREE ACCESSA study was conducted to examine the efficacy of indicators of anaerobic work capacity or estimations of anaerobic energy expenditure by measuring Δ blood lactate and O2 debt after short-term maximal exercise. Eight male subjects performed cycle ergometer pedaling against 5.5-7.0 kp resistance with maximal effort for 45 s. After pedaling, venous blood samples were drawn serially at 1 min intervals from 1 to 10 min, for measurement of peak blood lactate. Anaerobic energy expenditure was determined in terms of both alactacid and lactacid energy expenditure, on the basis of Δ blood lactate (L-method) and O2 uptake kinetics (D-method) during recovery.
The following results were obtained:
1) The correlation coefficient between lactate and performance was higher (about 0.3-0.5) when lactate was expressed as the estimated value of lactate production rather than Δ blood lactate. A significant relationship (r=0.740, p<0.05) was found between lactate production and peak power.
2) When O2 uptake after recovery for 60 min did not recover to the baseline of O2 uptake at rest, O2 debt was calculated using a baseline of O2 uptake just before the end of recovery. This O2 debt was significantly correlated with work at any time of recovery.
3) There was a significant relationship between lactate production and lactic O2 debt, which was significantly correlated with work.
4) When lactacid energy was calculated using a formula of 1.7×Δ blood lactate and 0.3 kcal/g lactate, there was no significant difference between anaerobic energy expenditure calculated by the L- and D-methods for up to 30 min during recovery.
It was concluded that a) the estimated value of lactate production and O2 debt calculated using a baseline of O2 uptake just before the end of recovery could be employed as an indicator of anaerobic work capacity, and b) Δ La multiplied by a coefficient of 1.7 and 0.3 kcal/g lactate was more appropriate for estimating anaerobic expenditure in short-term maximal cycle ergometer pedaling.View full abstractDownload PDF (1224K) -
HIROYO KITAO, MITSUO MATSUDA, ICHIRO KONO, SHUKOU HAGA, HIDEO FUKUSHIM ...1989 Volume 38 Issue 3 Pages 95-104
Published: June 01, 1989
Released on J-STAGE: September 30, 2010
JOURNAL FREE ACCESSTo investigate the effects of caloric restriction combined with physical training on the immunity in athletes, some cellular and humoral immune functions were examined in 9 young female athletes before and after a caloric restriction program. The control group consisted of 7 age-matched female non-athletes who were not on diet. The athletes continued their exercise trainings as usual and ate low-caloric diets (1, 300 kcal/day : including 60 g/day of protein) for 2 weeks. They reduced their body weights by 3.1% and their body fats by 18.2% at the end of the program. As the marker of nutritional condition, serum levels of pre-albumin and retinol binding protein were measured. Both of them at the end of 2 weeks were slightly decreased, but did not reach statistical significance, these athletes, however, showed slight hemoconcentrations after the caloric restriction program combined with physical exercise. Therefore, the total amounts of those two substances were supposed to be significantly decreased. The phagocytic activities of blood monocytes against sheep erythrocytes opsonized with IgG and saccharomyces cerevisiae yeast in the athletes were already higher than those in controls, even before the caloric restriction. After reducing their body weights, those phagocytic activities were significantly decreased (p<0.01, respectively) to the same levels of those activities in controls. The blastgenic response of T lymphocytes isolated from the athletes to the phytohaemagglutinin was also higher than the response in controls before the caloric restriction, and continued the same levels during the caloric restriction period. The complement activity and the serum concentrations of IgG, IgM, and IgA in athletes were not different from those in controls before and after the caloric restriction. The concentration of fibronectin in sera of the athletes were significantly decreased after the caloric restriction program (p<0.05) ; however, these concentrations were not significantly different from those in sera of controls. We concluded that even a moderate caloric restriction program might reduce some immune functions in the athletes continuing their daily physical trainings. The deterioration in immunity, however, might not affect their health, because those functions in the athletes of this study had been originally enhanced, and maintained the normal range after a moderate weight reduction.View full abstractDownload PDF (1207K) -
NOBUO TANAKA, FUMIKO MIMASA, SEIKI HORI1989 Volume 38 Issue 3 Pages 105-114
Published: June 01, 1989
Released on J-STAGE: September 30, 2010
JOURNAL FREE ACCESSObservations on the digital vascular hunting reaction to cold air exposure and measurements of physical characteristics were made among male university students: 88 non-athletic; 18 tall, lean non-athletic; 26 volleyball players. Experiments were carried out at about 3 p, m. in winter. The subjects sat at rest on a chair for 30 min in a room at 22°C and inserted their left hands up to the wrist with the palm downwards into a chamber at -10°C for 30 min. The skin temperature on the center of the dorsal surface of the distal phalanx of the left middle finger was recorded continuously starting at 5 min before the cold exposure. The physical status of volleyball players was characterized by large stature, a low body fat and long fingers, while that of tall and lean non-athletic subjects was characterized by light body weight, a low body fat, and long and slender fingers. In each group, the higher the temperature before cold exposure, the higher were the skin temperature at the first temperature rise during cold exposure and the mean skin temperature during cold exposure. The mean value of the finger skin temperature during cold exposure for volleyball players at a given value of skin temperature before cold exposure tended to be lower than those for non-athletes. The mean value of the finger skin temperature during cold exposure for volleyball players was lower than that for non-athletes. Among the non-athletes, tall and lean subjects showed a lower mean skin temperature during cold exposure. The skin temperature during cold exposure tended to be lower when the length of the finger was longer and the ratio of finger girth to length was smaller. The lower mean skin temperature during cold exposure for volleyball players might result from injuries and shocks to the finger received during volleyball training.View full abstractDownload PDF (1108K) -
1989 Volume 38 Issue 3 Pages 115-121
Published: June 01, 1989
Released on J-STAGE: September 30, 2010
JOURNAL FREE ACCESSDownload PDF (912K) -
1989 Volume 38 Issue 3 Pages 121-130
Published: June 01, 1989
Released on J-STAGE: September 30, 2010
JOURNAL FREE ACCESSDownload PDF (1376K)
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