Search PubMed⌕ Search

Biomedical subjects

E Peltola

Publications and source records attributed to E Peltola.

5 recordsLinked to original sources
PubMed1993

Aerobic characteristics, oxygen debt and blood lactate in speed endurance athletes during training.

Aerobic characteristics, oxygen debt and blood lactate were analysed in 20 male speed endurance athletes (400 m sprinters and 400 m hurdlers). The subjects were tested three times; at the beginning of March, at the end of May and at the end of August. Aerobic and anaerobic threshold and maximal oxygen uptake measured on the treadmill decreased (p < 0.05-0.01) from the second test occasion to the third one. The anaerobic work test on the treadmill was a constant load test at 5.56 m.s-1 with a slope of 4 degrees. The time to exhaustion increased (p < 0.05) from the first test occasion (112 +/- 17 s) to the second one (136 +/- 35 s) and did not change in the last test (135 +/- 25 s). Following the anaerobic work test oxygen debt was measured during 20 minutes. The highest total oxygen debt values (144 +/- 19 ml.kg-1) were observed in the second test occasion. Peak blood lactate following the anaerobic work increased (p < 0.05) from the first test occasion to the second one and remained at the same level during the next three competitive months. The good speed endurance athletes differed from the poor counterparts in time to exhaustion (p < 0.01), in 100 m record time (p < 0.01) and in maximal oxygen uptake (p < 0.05). Our results suggest that aerobic characteristics decrease during the competitive period in speed endurance athletes. The anaerobic performance capacity including work time and peak blood lactate is at high level in the competitive period.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1990

Physiological performance capacity in different prepubescent athletic groups.

Endurance, strength and speed capacity were investigated among prepubescent male weight lifters (EL), endurance runners (ER) and sprint runners (SR). The subjects were selected by their coaches and all of them were classified as promising and successful junior athletes in the age groups of 10-13 years. Twelve boys belonged to athletic group (AG) and their performance capacity was compared to normally active control (C) boys (n = 9). Biological age was significantly (p less than 0.05) greater in AG (11.3 +/- 0.9 years) than in C (10.2 +/- 1.4 years) but in chronological age there was no difference between the groups. Maximal oxygen uptake was significantly (p less than 0.05) higher in AG (62.3 +/- 3.1 ml.kg-1.min-1) than in C (55.4 +/- 7.7 ml.kg-1.min-1). The endurance runners had the highest value (66.5 +/- 2.9 ml.kg-1.min-1). In anaerobic characteristics there were no significant differences. The rise of centre of gravity (0.26 +/- 0.03 m) of AG in a test for the best drop jump was clearly (p less than 0.05) higher than that (0.22 +/- 0.03 m) of C. The weight lifters and sprint runners were the best in the test for force production. AG had significantly (p less than 0.01) shorter choice reaction time (261 +/- 39 ms) than C (344 +/- 81 ms). Testosterone correlated with jump performances (p less than 0.05), biological age (p less than 0.01) and chronological age (p less than 0.001). Growth hormone correlated significantly only with biological age (p less than 0.05) and testosterone (p less than 0.001). In conclusion, endurance capacity (aerobic) and strength capacity were greater in the athletic group than in the control group and it was suggested that training background and more advanced biological maturation of the athletes affected especially their strength capacity. The parameters used in this investigation can be utilized for talent selection in sport.

Adolescent↗
PubMed1990

Changes in running speed, blood lactic acid concentration and hormone balance during sprint training performed at an altitude of 1860 metres.

The development of results of five national level sprinters (Group A) was followed up during a training period of two weeks at an altitude of 1860 m aiming at increase of strength and speed and after it. Changes in anaerobic capacity were monitored by making blood lactic acid determinations, and occurrence of any overstrain by serum testosterone, cortisol, growth hormone and SHBG (sex hormone binding globulin) determinations. A control group (Group B) trained simultaneously according to a similar programme at sea level. Maximal 150 m running speeds increased in Group A significantly during the two weeks at the altitude of 1860 m (p less than 0.001). No such increase was observable in Group B. Maximal 300 m running speeds and maximal lactic acid concentrations after running did not increase significantly in either group. Serum hormone levels did not change significantly either, in either group. Training at an altitude of 1860 m to increase strength and speed significantly improved results at the shorter distance of 150 m but had not significant effects on anaerobic capacity or on serum testosterone, cortisol, growth hormone or SHBG levels.

Adult↗