PMID- 26985129
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20160317
LR  - 20181113
IS  - 0860-021X (Print)
IS  - 2083-1862 (Electronic)
IS  - 0860-021X (Linking)
VI  - 33
IP  - 1
DP  - 2016 Mar
TI  - The IGF-1/cortisol ratio as a useful marker for monitoring training in young 
      boxers.
PG  - 15-22
LID - 10.5604/20831862.1180172 [doi]
AB  - Training effects on plasma insulin-like growth factor-1 (IGF-1)/cortisol ratio 
      were investigated in boxers. Thirty subjects were assigned to either the training 
      or the control group (n = 15 in both). They were tested before the beginning of 
      training (T0), after 5 weeks of intensive training (T1), and after 1 week of 
      tapering (T2). Physical performances (Yo-Yo intermittent recovery test level-1), 
      training loads, and blood sampling were obtained at T0, T1, and T2. Controls were 
      only tested for biochemical and anthropometric parameters at T0 and T2. A 
      significantly higher physical performance was observed at T2 compared to T1. At 
      T1, cortisol levels were significantly increased whereas IGF-1 and insulin-like 
      growth factor binding protein-3 (IGFBP-3) levels remained unchanged compared to 
      baseline. At T2, cortisol levels decreased while IGF-1 and IGFBP-3 levels 
      increased. The IGF-1/cortisol ratio decreased significantly at T1 and increased 
      at T2, and its variations were significantly correlated with changes in training 
      loads and Yo-Yo intermittent recovery test level 1 (IRT1) performance over the 
      training period. Cortisol variations correlated with changes in training load (r 
      = 0.64; p < 0.01) and Yo-Yo IRT1 performance (r = 0.78; p < 0.001) at T1 whereas 
      IGF-1 variations correlated only with changes in Yo-Yo IRT1 performance at T2 (r 
      = 0.71; p < 0.001). It is concluded that IGF-1/cortisol ratio could be a useful 
      tool for monitoring training loads in young trained boxers.
FAU - Nassib, S
AU  - Nassib S
AD  - Research Laboratory, "Sport Performance Optimisation", National Centre of 
      Medicine and Science in Sports, Tunis, Tunisia; University of Manouba, ISSEP, 
      Ksar-Said, Tunisia.
FAU - Moalla, W
AU  - Moalla W
AD  - University of Sfax, High Institute of Sport and Physical Education Sfax, Research 
      Unit EM2S, Sfax, Tunisia.
FAU - Hammoudi-Nassib, S
AU  - Hammoudi-Nassib S
AD  - Research Laboratory, "Sport Performance Optimisation", National Centre of 
      Medicine and Science in Sports, Tunis, Tunisia; University of Manouba, ISSEP, 
      Ksar-Said, Tunisia.
FAU - Chtara, M
AU  - Chtara M
AD  - Research Laboratory, "Sport Performance Optimisation", National Centre of 
      Medicine and Science in Sports, Tunis, Tunisia; University of Manouba, ISSEP, 
      Ksar-Said, Tunisia.
FAU - Hachana, Y
AU  - Hachana Y
AD  - University of Manouba, ISSEP, Ksar-Said, Tunisia.
FAU - Tabka, Z
AU  - Tabka Z
AD  - University of Sousse, Laboratory of Cardio-circulatory, Respiratory, and Hormonal 
      Adaptations to Muscular Exercise, Faculty of Medicine Ibn El Jazzar, Sousse, 
      Tunisia.
FAU - Chamari, K
AU  - Chamari K
AD  - Athlete Health and Performance Research Centre, ASPETAR, Qatar Orthopaedic and 
      Sports Medicine Hospital, Qatar.
FAU - Elloumi, M
AU  - Elloumi M
AD  - University of Sousse, Laboratory of Cardio-circulatory, Respiratory, and Hormonal 
      Adaptations to Muscular Exercise, Faculty of Medicine Ibn El Jazzar, Sousse, 
      Tunisia; Blaise Pascal University, EA 3533: AME2P, Clermont-Ferrand, France; 
      University of Manouba, ISSEP, Ksar-Said, Tunisia.
LA  - eng
PT  - Journal Article
DEP - 20151119
PL  - Poland
TA  - Biol Sport
JT  - Biology of sport
JID - 8700872
PMC - PMC4786582
OTO - NOTNLM
OT  - Hormonal responses
OT  - Physical performance
OT  - Physiological demands
OT  - Training intensity
OT  - biochemical factor
EDAT- 2016/03/18 06:00
MHDA- 2016/03/18 06:01
PMCR- 2016/03/01
CRDT- 2016/03/18 06:00
PHST- 2015/02/03 00:00 [received]
PHST- 2015/04/30 00:00 [revised]
PHST- 2015/05/05 00:00 [accepted]
PHST- 2016/03/18 06:00 [entrez]
PHST- 2016/03/18 06:00 [pubmed]
PHST- 2016/03/18 06:01 [medline]
PHST- 2016/03/01 00:00 [pmc-release]
AID - 1180172 [pii]
AID - 10.5604/20831862.1180172 [doi]
PST - ppublish
SO  - Biol Sport. 2016 Mar;33(1):15-22. doi: 10.5604/20831862.1180172. Epub 2015 Nov 
      19.