european college of sport science

PP-SM06 Sports Medicine 6
3D SCAPULOTHORACIC AND ISOKINETIC SHOULDER EVALUATION DURING INTERNAL/EXTERNAL ROTATION AT 90°
ABDUCTION IN ELITE VOLLEYBAL ATHLETES WITH AND WITHOUT NERVUS SUPRASCAPULARIS LESION
BAEYENS, J.P., VIROUX, P., CABRI, J., MEEUSEN, R.
VRIJE UNIVERSITEIT BRUSSEL
Introduction: The incidence of a n.suprascapularis lesion (NSL) in elite volleybal athletes is about 20% with a predilection at the spinoglenoid
notch (Ferretti et al. 1998). Clinically presenting with a hypotrophy of the infraspinatus, these volleybal players do not complain of
functional impairment nor pain.
Compared to asymptomatic elite volleybal athletes, the dominant as well as the non dominant shoulder of elite volleybal athletes with
NSL present increased passive external rotation in 90° abduction, and no differences for internal rotation at 90° abduction (Witvrouw et al.
2000). In elite volleybal players with NSL, isokinetic concentric mean peak torque at 60° and 180°/sec was different from the asymptomatic
volleybal athletes for internal rotation in both the dominant and non dominant shoulder, but only different for external rotation in the
non dominant shoulder (Witvrouw et al. 2000).
No study combined isokinetic strength measurement with registration of dynamic scapulothoracic motion.
Methods: In this study, scapulothoracic motion and isokinetic concentric strength was evaluated for external rotation/internal rotation at
90° of abduction in 6 elite volleyball athletes with NSL and 8 without (age-matched groups, 24,2+2.1yrs). Concentric isokinetic testing of 5
at 60° and 240°/sec was evaluated with the Biodex System 3 Pro, simultaneously following the 3D scapulothoracic arthrokinematics by
means of electromagnetic tracking (extended Flock of Birds, Ascension Technology) which is validly applicable up to 120° of elevation.
Statistic testing was done non parametrically. Parameters evaluated with Biodex included average peak torque, internal and external
rotation range of motion, agonist/atagonist ratio.
Results: No significant differences (.05 level) in isokinetic strenght were found in the dominant and non dominant shoulders between the
NSL group and the asymptomatic group. Furthermore, in both groups, no differences in isokinetic strenght were found in between the
dominant and non dominant shoulder. For the scapulothoracic motion behaviour, no significant differences were found in the scapulothoracic
Euler angles between the asymptomatic control group and NSL group.
Conclusion: Examining isokinetic strength and scapulothoracic motion during internal/external rotation at 90° abduction, our data show
no differences in isokinetic strength and scapulothoracic motion behaviour. As such, our data differ with Witvrouw et al.’s findings (2000)
This may be due to differences in patient group and measurement procedure. Anyhow, our data apply more to the reality that elite
volleyball players with NSL do not complain of functional impairment.
Ferretti A, De Carli A, Fontana M, Injury of the suprascapular nerve at the spinoglenoid notch, The natural history of infraspinatus atrophy
in volleyball players. Am J Sports Med, 26, 1998, 759-763.
Witvrouw E, Cools A, Lysens R, Cambier D, Vanderstraeten G, Victor J, Sneyers C, Walravens M, Suprascapular neuropathy in volleyball
players, Br J Sports Med, 34, 2000, 174-180.
THE EFFECTS OF REHYDRATE DRINKS ON THE EXERCISE PERFORMANCE TEST.
IMAI, T., SHINDO, Y., UTSUGI, K., IIDA, K., WATANABE, K., MUKAI, N., MIYAKAWA, S., MEDA, A., KITAGAWA, Y., KISO, Y.,
YABUKI, H., HARADA, H.
UNIVERSITY OF TSUKUBA, SUNTORY LIMITED, SUNTORY LIMITED
Introduction:When sports player perform in prolong exercise in warm condition, they sweat a lot and lose their body mass. Current recommendations
encourage athletes to drink sufficient amount to avoid excessive change in body mass. Adequate fluid intake during
exercise is known to prevent cardiovascular strain, which could reduce performance capacity in prolonged exercise. However, how the
effect on performance will change by drinking different type of drinks during exercise is not clear.
Purpose: The aim of this study is to investigate the effects of rehydration with drinks on the exercise performance test.
Methods: Ten university football players participated in this study (age 22.1 ± 1.1yr, Vo2max 50.5 ± 3.5ml/kg/min). Each subjects completed
the four experimental trials, randomized and administered in a crossover manner, separated by at least 7 days. They exercised on
a bicycle ergometer for 90min at 65% of Vo2max then performance test was conducted using the bicycle. In this exercise performance
test the workload increased 2W every 5sec from 100W and stopped the bicycle in a state equal to or less than 50 rounds per minute. In
experiment 1 lost sweat volume was measured without any fluid intake. Sweat loss during each period of exercise was determined
through changes in body mass. In experiment 2.3.4 subjects exercised with drink intake (Gatorade® or Sports drink A or Placebo drink)
during the experimental trials. The drink volume consumed was equal to 80% of sweat lost during exercise, provided in three equal
bottles at 20 min intervals (drink time 20,40,60 min).
Results: Time of exercise continuance and workload was Sweat test 355±91(s) 242.4±37.5(W),Gatorade® 459.9±86.4(s), 277.6±30.5(W).
Sports drink A 403.8±88.5(s) 260.0±36.3 (W), Placebo 394.5±99.4(s), 256.4±40.3 (W). Time of exercise continuance and workload with
Gatorade® was significantly greater than those without any drink in Sweat test. There were no significant differences on exercise performance
test time or workload among three drinks. However, Gatorade® showed the greatest time in total and 70% of subjects indicated
the best time than other drinks.
Conclusions: We suggested that exercise performance was affected by rehydrate drink.
BIKE TRANSALP 2008: THE LIQUID INTAKE AND ITS EFFECT ON BODY’S FLUID HOMEOSTASIS IN THE COURSE OF A
MULTI-STAGE MTB CROSS-COUNTRY MARATHON RACE IN THE CENTRAL ALPS
SCHENK, K.
UNIVERSITY OF VERONA
Introduction: Despite the increasing number of bikers who practice off road cycling as recreational or competitive sport, scientific interest
in mountain biking is still modest. The lack of sport-specific guidelines in training and competition often seduces athletes to orientate
themselves to schemes and standards of related sports, risking a slump in terms of performance and health.
Therefore, the aim of this study was to analyse the drinking behaviour in a multi-stage MTB cross-country marathon race. Conclusions
should be drawn about influencing factors and limits of an appropriate fluid intake during the race and about the reliability of body mass
change monitoring to self-control body fluid homeostasis in course of the Bike Transalp competition 2008.
Methods
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ANNUAL CONGRESS OF THE EUROPEAN COLLEGE OF SPORT SCIENCE