Abstract
International sports calendars are being increasingly filled with
competitive events and fatiguing travel, at the risk of overloading the
athletes involved. The Medical Committee of the International Biathlon Union,
in order to check for any significant changes, analysed seven recent
competitive seasons, calculating the number of races and total and daily
numbers of racing kilometers for each season. A theoretical model for stress
was subsequently developed, based on identification and quantification of
favourable and unfavourable factors, with establishment of average and maximal
stress scores for each season. A questionnaire was distributed to athletes to
collect data about daily stress levels, and the correspondence between the
theoretical model and the athletes' responses was determined. This
analysis demonstrates that the biathlon has become more demanding for those
athletes in the racing circuit, with significant increases in number of races,
total and daily numbers of kilometers raced, and average stress scores for
athletes of both sexes. The self-reported daily stress levels for some athletes
show an interesting correspondence with the theoretical stress model. If such
correspondence is confirmed, this model might constitute an instrument with
which international sports federations, considering the concentration of races,
related travel and recovery times, could plan sustainable competitive
calendars.
Key words
Stress - overtraining - competition - biathlon
References
-
1
Busso T, Carasso C, Lacour J R.
Adequacy of a systems structure in the modeling of training
effects on performance.
J Appl Physiol.
1991;
71
2044-2049
-
2 de Merode A, Schamasch P. Harmonisation of methods and measures in the fight against
doping in sport. European Commission: General Directorate Research, Final
Project Report SMT4-CT98 - 6530 1999: 2
-
3
Fitz-Clarke J R, Morton R H, Banister E W.
Optimizing athletic performance by influence curves.
J Appl Physiol.
1991;
71
1151-1158
-
4
Foster C.
Monitoring training in athletes with reference to
overtraining syndrome.
Med Sci Sports Exerc.
1998;
30
1164-1168
-
5
Fry R W, Morton A R, Keast D.
Overtraining in athletes: an update.
Sports Med.
1991;
12
32-65
-
6
Hoffmann M D, Street G M.
Characterization of heart rate response during biathlon.
Int J Sports Med.
1992;
13
390-394
-
7
Kellmann M, Gunther K D.
Changes in stress and recovery in elite rowers during
preparation for the Olympic Games.
Med Sci Sports Exerc.
2000;
32
676-683
-
8
Kentta G, Hassmenn P.
Overtraining and recovery. A conceptual model.
Sports Med.
1998;
26
1-16
-
9
Koutedakis Y, Sharp N C.
Seasonal variations of injury and overtraining in elite
athletes.
Clin J Sports Med.
1998;
8
18-21
-
10
Kuipers H, Keizer H A.
Overtraining in elite athletes. Review and directions for the
future.
Sports Med.
1988;
6
79-92
-
11
Lehmann M J, Lormes W, Opitz-Gress A, Steinacker J M, Netzer N, Foster C, Gastmann U.
Training and overtraining: an overview and experimental
results in endurance sports.
J Sports Med Phys Fitness.
1997;
37
7-17
-
12
Manfredini F, Tschukin A, Moran M, Mangolini C, Buzzoni D, Haberstroh J.
Blood testing in Biathlon: observation of hematocrit values
during competitive periods 1994 - 97.
Int J Sports Med.
1999;
20
403-406
-
13
Manfredini R, Manfredini F, Fersini C, Conconi F.
Circadian rhythms, athletic performance, and jet-lag.
Br J Sports Med.
1998;
32
101-106
-
14
Morton R H, Fitz-Clarke J R, Banister E W.
Modeling human performance in running.
J Appl Physiol.
1990;
69
1171-1177
-
15
Rundell K W, Szmedra L.
Energy cost of rifle carriage in biathlon skiing.
Med Sci Sports Exerc.
1998;
30
570-576
F. Manfredini, MD
Centro Studi Biomedici Applicati allo Sport ·
Università di Ferrara
Via Gramicia 35 · 44100 Ferrara · Italy
·
Phone: +39 (532) 291070
Fax: +39 (532) 705018
Email: cnf@unife.it