TY  - JOUR
A1  - Thiel, Christian
A1  - Vogt, Lutz
A1  - Bürklein, Meike
A1  - Rosenhagen, Andreas
A1  - Hübscher, Markus
A1  - Banzer, Winfried
T1  - Functional overreaching during preparation training of elite tennis professionals
T2  - Journal of human kinetics
N2  - This case study evaluated the response of objective and subjective markers of overreaching to a highly demanding conditioning training mesocycle in elite tennis players to determine 1) whether players would become functionally or non-functionally overreached, and 2) to explore how coherently overreaching markers would respond. Performance, laboratory and cardiac autonomous activity markers were evaluated in three experienced male tennis professionals competing at top 30, top 100 and top 1000 level before and after their strength and conditioning training was increased by 120, 160 and 180%, respectively, for 30 days. Every week, subjective ratings of stress and recovery were evaluated by means of a questionnaire. After 74, 76 and 55 h of training, increases in V̇O2max (+8, +5 and +18%) and speed strength indices (+9, +23 and +5%) were observed in all players. Changes of maximal heart rate (-5, -6, +4 beats per minute), laboratory markers (e.g. insulin-like growth factor -26, -17, -9%; free testosterone to cortisol ratio -63, +2, -12%) and cardiac autonomous activity markers (heart rate variability -49, -64, -13%) were variable among the players. Improved performance provides evidence that overreaching was functional in all players. However, several overreaching markers were altered and these alterations were more pronounced in the two top 100 players. The response of overreaching indicators was not coherent.
KW  - overreaching markers
KW  - racket sports
KW  - strength and conditioning mesocycle
Y1  - 2011
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/33465
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-334656
SN  - 1899-7562
SN  - 1640-5544
N1  - Copyright © Editorial Committee of Journal of Human Kinetics
This article is an open-access article distributed under the terms and conditions of the Creative Commons Attribution license  This content is open access. (CC BY-NC-ND 4.0)
VL  - 28
SP  - 79
EP  - 89
PB  - Academy of Physical Education
CY  - Katowice
ER  -