PMID- 22531608
OWN - NLM
STAT- MEDLINE
DCOM- 20120919
LR  - 20170126
IS  - 0022-4707 (Print)
IS  - 0022-4707 (Linking)
VI  - 52
IP  - 2
DP  - 2012 Apr
TI  - Relationships between salivary free testosterone and the expression of force and 
      power in elite athletes.
PG  - 221-7
AB  - AIM: This study examined the predictive relationships between the salivary free 
      testosterone (T) concentrations of elite athletes and the expression of force and 
      power. METHODS: A group of elite male rugby players (N.=64) were assessed for 
      peak force (PF), peak rate of force development (PRFD), force at 100 milliseconds 
      (F100 ms) and 250 milliseconds (F250 ms) during an isometric mid-thigh pull 
      (IMTP), and/or peak power (PP) and height during a countermovement jump (CMJ). 
      Saliva samples were collected before testing and assayed for free T. 
      Relationships between individual T concentrations and performance were assessed 
      as a pooled group and 4 sub-groups of equal size. RESULTS: As pooled data sets, 
      none of the IMTP and CMJ performance variables were significantly correlated with 
      free T in either the PF or PP groups (r=0.01-0.23). The PF and PP abilities of 
      the 4 sub-groups were significantly different, so that PF1>PF2>PF3>PF4 (P<0.001) 
      and PP1>PP2>PP3>PP4 (P<0.01). When the 4 sub-groups were analysed, the T 
      concentrations of the PF4 group were significantly (P<0.05-0.01) correlated to 
      PRFD (r=0.69) and F100 ms (r=0.55) during the IMTP, as was F100 ms in the PF1 
      group (r=0.66). In the PP1 group, free T also correlated to CMJ height (r=0.62). 
      CONCLUSION: The key conclusion is that the expression of force and power in an 
      elite athletic group may be dependent, to some extent, on individual variation in 
      salivary free T concentrations and existing strength or power levels. The current 
      results also confirm that the grouping of elite athletes of mixed strength or 
      power ability may bias predictive results in a manner not reflective of 
      sub-groups within this population.
FAU - Crewther, B T
AU  - Crewther BT
AD  - Hamlyn Centre, Imperial College, London, UK. bcrewthe@imperial.ac.uk
FAU - Kilduff, L P
AU  - Kilduff LP
FAU - Cook, C J
AU  - Cook CJ
FAU - Cunningham, D J
AU  - Cunningham DJ
FAU - Bunce, P
AU  - Bunce P
FAU - Bracken, R M
AU  - Bracken RM
FAU - Gaviglio, C M
AU  - Gaviglio CM
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - Italy
TA  - J Sports Med Phys Fitness
JT  - The Journal of sports medicine and physical fitness
JID - 0376337
RN  - 3XMK78S47O (Testosterone)
SB  - IM
MH  - Athletic Performance/*physiology
MH  - Football/physiology
MH  - Humans
MH  - Isometric Contraction
MH  - Male
MH  - Muscle Strength/*physiology
MH  - Muscle, Skeletal/physiology
MH  - Predictive Value of Tests
MH  - Saliva/*chemistry
MH  - Testosterone/*analysis/metabolism
MH  - Thigh
EDAT- 2012/04/26 06:00
MHDA- 2012/09/20 06:00
CRDT- 2012/04/26 06:00
PHST- 2012/04/26 06:00 [entrez]
PHST- 2012/04/26 06:00 [pubmed]
PHST- 2012/09/20 06:00 [medline]
AID - R40123491 [pii]
PST - ppublish
SO  - J Sports Med Phys Fitness. 2012 Apr;52(2):221-7.