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Titolo:
TRAINING AND OVERTRAINING - AN OVERVIEW AND EXPERIMENTAL RESULTS IN ENDURANCE SPORTS
Autore:
LEHMANN MJ; LORMES W; OPITZGRESS A; STEINACKER JM; NETZER N; FOSTER C; GASTMANN U;
Indirizzi:
UNIV ULM,HOSP MED,DEPT SPORTS MED,STEINOVELSTR 9 D-89075 ULM GERMANY MILWAUKEE HEART INST MILWAUKEE WI 00000
Titolo Testata:
Journal of Sports Medicine and Physical Fitness
fascicolo: 1, volume: 37, anno: 1997,
pagine: 7 - 17
SICI:
0022-4707(1997)37:1<7:TAO-AO>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
BETA-ADRENERGIC RECEPTORS; DISTANCE RUNNERS; MUSCLE GLYCOGEN; PERFORMANCE; EXERCISE; CATECHOLAMINES; DYSFUNCTION; RESPONSES; INTENSITY;
Keywords:
OVERTRAINING; PHYSICAL ENDURANCE, PHYSIOLOGY; CORTICOTROPIN; SOMATOTROPIN; HEAT SHOCK PROTEINS 70; SYMPATHETIC NERVOUS SYSTEM PHYSIOLOGY; NEUROMUSCULAR JUNCTION PHYSIOLOGY; MUSCLE FATIGUE PHYSIOLOGY; PHYSICAL EDUCATION AND TRAINING;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
51
Recensione:
Indirizzi per estratti:
Citazione:
M.J. Lehmann et al., "TRAINING AND OVERTRAINING - AN OVERVIEW AND EXPERIMENTAL RESULTS IN ENDURANCE SPORTS", Journal of Sports Medicine and Physical Fitness, 37(1), 1997, pp. 7-17

Abstract

Overtraining can be defined as ''training-competition much greater than recovery imbalance'', that is assumed to result in glycogen deficit, catabolic > anabolic imbalance, neuroendocrine imbalance, amino acidimbalance, and autonomic imbalance. Additional non-training stress factors and monotony of training exacerbate the risk of a resulting overtraining syndrome. Short-term overtraining called overreaching which can be seen as a normal part of athletic training, must be distinguished from long-term overtraining that can lead to a state described as burnout, staleness or overtraining syndrome. Persistent performance incompetence, persistent high fatigue ratings, altered mood state, increased rate of infections, and suppressed reproductive function have been described as key findings in overtraining syndrome. An increased risk of overtraining syndrome may be expected around 3 weeks of intensified/prolonged endurance training at a high training load level. Heavy training loads may apparently be tolerated for extensive periods of time if athletes take a rest day every week and use alternating hard and easy days of training. Persistent performance incompetence and high fatigue ratings may depend on impaired or inhibited transmission of ergotropic (catabolic) signals to target organs, such as: (I) decreased neuromuscular excitability, (II) inhibition of alpha-motoneuron activity (hypothetic), (III) decreased adrenal sensitivity to ACTH (cortisol release) and increased pituitary sensitivity to GHRH (GH release) resulting in a counter-regulatory shift to a more anabolic endocrine responsibility, (IV) decreased beta-adrenoreceptor density (sensitivity to catecholamines), (V) decreased intrinsic sympathetic activity, and (VI) intracellular protective mechanisms such as increased synthesis of heat-shock proteins (HSP 70) represent a complex strategy against an overload-dependent cellular damage.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 08/07/20 alle ore 08:05:07