european college of sport science

PP-PH01 Physiology 1
treadmill, in what concerns to absolute values (22.79 and 26.36 mg/dl respectively before and after the MTB treadmill), they remained
normal. The results of this study pointed out for a contribution of protein metabolism to energy production in MTB events of long distance
that could be prevented by an adequate carbohydrate supplementation.
EFFECTS OF STATIC STRETCHING ON PROLONGED INTERMITTENT EXERCISE PERFORMANCE
MIYAHARA, Y., MIEDA, K., EBASHI, H.
UNIVERSITY OF EAST ASIA
PURPOSE: The purpose of this study was to investigate effects of static stretching on prolonged intermittent exercise performance. METH-
ODS: Eight male university football players (age; 20±1 yr, height; 172.5±5.3 cm, weight; 65.6±4.9 kg, mean±SD) participated in this study.
They completed two 30min intermittent pedaling exercises with a 10min interval under three experimental conditions (passive rest (PR),
active rest (AR), and static stretching (SS)). The intermittent exercise protocols consisted of thirty sets, each set including 5-s maximal sprint
against a resistance of 7.5% body mass, 25-s active recovery, and 30-s passive rest. During the maximal sprint, peak-pedaling frequency,
mean power output, and mean power rate against peak power were evaluated and mean values of 30 sets were used for
analysis. Rate of perceived exertion (RPE) and blood lactate concentration (La) were determined at rest, 10, 20, and 30th set during the first
intermittent exercise, five and ninth min in the interval, and 10, 20, and 30th set during the second intermittent exercise. In addition, a
recovery rate of La was calculated as follows: La recovery rate = (mean La at the first intermittent exercise – mean La at the interval) /
(mean La at the first intermittent exercise - La at rest). In the interval between exercises, subjects were performed three treatments as
follows; 6min PR, 6min AR or 6min SS. For PR, subjects were required to sit the chair in a relaxed position for 6min. For AR, subjects performed
light pedaling on a cycle ergometer (10%load of 0.075kp/kg) at 50rpm for 6min. For SS, thigh (hamstrings and quadriceps) and
hip were stretched to the point where they perceived discomfort. During the SS, subjects held at the stretch position for 30s and repeated
it two times for each leg. The experimental conditions order was randomly assigned on three non-consecutive days, to rule out order
effects. RESULTS: La was significantly decreased by all treatments but the La recovery rate did not different among conditions (PR;
31.6±15.2%, AR; 42.4±21.5%, SS; 39.3±13.5%). Peak pedaling frequency and mean power were not altered by any conditions (peak
pedaling frequency: PR; 163±10, 162±11rpm, AR; 161±6, 160±8rpm, SS; 164±10, 164±10rpm, mean power: PR; 675.3±100.1, 672.1±94.2W,
AR; 657.2±73.2, 663.9±83.5W, SS; 672.8±92.0, 685.8±88.0W). Mean power rate significantly increased after SS (p < 0.05) whereas PR
and AR produced no changes in mean power rate (PR; 85.8±5.1, 86.0±5.2%, AR; 85.2±4.5, 86.0±4.4%, SS; 85.0±3.0, 87.0±3.2%). CON-
CLUSIONS: The SS may increase the prolonged intermittent exercise performance although the SS does not facilitate La removal.
PREDICTION OF MAXIMUM AEROBIC POWER AND MAXIMUM POWER OUTPUT FROM THE RESULTS OF 30-S AN-
AEROBIC WINGATE TEST
VODICKA, P., HELLER, J.
FACULTY OF PHYSICAL EDUCATION AND SPORT, CHARLES UNIVERSITY,
Introduction: Laboratory exercise testing in athletes is based on aerobic and anaerobic tests. In general, aerobic exercise tests are time
consuming and demand for highly sophisticated equipment, e.g. gas analysers and ventilometers that should be precisely calibrated.
Contrary to this, anaerobic exercise test are usually less time consuming and based on relatively simple principles. The aim of the study
was to verify the possibility to predict the main parameters of aerobic tests from the results of anaerobic exercise test, i.e. 30-s Wingate
test.
Methods: Altogether 152 top league ice-hockey players (age: 25.96 +/- 4.72 (SD) years; mass: 87.73 +/- 8.17 kg; height: 182.4 +/- 5.7 cm)
participated in the study. They were examined at the end of preparatory period before the season. In the same day they were tested by a
30-s Wingate test at a resistance 6 W.kg-1 (=0.104 kg.kg-1), and after 2-hour-lasting recovery break they were loaded by the stepwise
maximum cycle ergometry. The statistics included multiple stepwise linear regression analysis using SPSS statistical package. Age, body
mass, height, fat-free mass, and Wingate test results were considered independent variables whereas maximum aerobic power
(VO2max) and maximum power were considered dependent variables. As peak blood lactate concentration (LA) in the Wingate test is
sometimes (but not as a standard) included to the results of the Wingate test, the results were computed both with and without LA as an
independent variable.
Results: Pmax [W] = 351.227 + 0.322*Pmin [W] – 2.867*MP/PP [%] + 0.880*Age [y]
r= 0.685; SEE= 25.159; sign. 2.976E-20
Pmax/kg [W.kg-1] = 9.016 – 0.055*Body mass [kg] – 0.004*Pmin [W] – 0.039*MP/PP [%] + 0.012*Age [y]
r= 0.694; SEE= 0.287; sign. 3.559E-20
VO2max [l.min-1] = 0.487 + 0.003*Pmin [W] + 0.015*Body mass [kg] + 0.053*LA [mmol.l-1]
r= 0.662; SEE= 0.372; sign. 1.750E-18
VO2max [l.min-1] = 1.375 + 0.003*Pmin [W] + 0.015*Body mass [kg]
r= 0.641; SEE= 0.380; sign. 7.453E-18
VO2max/kg [ml.kg-1.min-1] = 36.437 + 2.935*Pmin/kg [W.kg-1] - 0.166*Body mass [kg] + 0.603*LA [mmol.l-1]
r= 0.539; SEE= 4.301; sign. 4.972E-11
VO2max/kg [ml.kg-1.min-1] = 47.670 + 2.797*Pmin/kg [W.kg-1] - 0.174*Body mass [kg]
r= 0.506; SEE= 4.388; sign. 2.621E-10
Discussion: Regardless the substantial differences in the nature of the aerobic cycle ergometer test and anaerobic Wingate test the results
had demonstrated the possibility to predict the parameters of aerobic tests from the results of the 30-s Wingate test. The standard
errors of the estimate obtained form these equation seem to be considerably low and therefore acceptable, however coefficients of
correlation (r) ranging 0.506 to 0.694 and/or coefficient of determination (R2) 0.256 to 0.482 may limit the predictive validity of VO2max
and Pmax from the Wingate test Results: References
Inbar O, Bar-Or O, Skinner J.S. (1996). The Wingate Anaerobic Test. Human Kinetics, Champaign.
Carey D.G., Richardson M.T. (2003). J. Sports Sci Med (2003) 2, 151-157.
250 14 TH
ANNUAL CONGRESS OF THE EUROPEAN COLLEGE OF SPORT SCIENCE