Sökning: WFRF:(Nordin Jonas) >
Alterations in amin...
Alterations in amino acid concentrations in the plasma and muscle in human subjects during 24 h of simulated adventure racing
-
- Borgenvik, Marcus (författare)
- Gymnastik- och idrottshögskolan,Björn Ekbloms forskningsgrupp
-
- Nordin, Marie (författare)
- Gymnastik- och idrottshögskolan,Björn Ekbloms forskningsgrupp
-
- Mattsson, C. Mikael (författare)
- Gymnastik- och idrottshögskolan,Björn Ekbloms forskningsgrupp
-
visa fler...
-
- Enqvist, Jonas K. (författare)
- Gymnastik- och idrottshögskolan,Björn Ekbloms forskningsgrupp
-
- Blomstrand, Eva (författare)
- Gymnastik- och idrottshögskolan,Eva Blomstrands forskningsgrupp
-
- Ekblom, Björn (författare)
- Gymnastik- och idrottshögskolan,Björn Ekbloms forskningsgrupp
-
visa färre...
-
(creator_code:org_t)
- 2012-02-18
- 2012
- Engelska.
-
Ingår i: European Journal of Applied Physiology. - : Springer Science and Business Media LLC. - 1439-6319 .- 1439-6327. ; 112, s. 3679-3688
- Relaterad länk:
-
https://urn.kb.se/re...
-
visa fler...
-
https://doi.org/10.1...
-
http://kipublication...
-
visa färre...
Abstract
Ämnesord
Stäng
- This investigation was designed to evaluate changes in plasma and muscle levels of free amino acids during an ultra-endurance exercise and following recovery. Nine male ultra-endurance trained athletes participated in a 24-h standardized endurance trial with controlled energy intake. The participants performed 12 sessions of running, kayaking and cycling (4 x each discipline). Blood samples were collected before, during and after exercise, as well as after 28 h of recovery. Muscle biopsies were taken 1 week before the test and after exercise, as well as after 28 h of recovery. During the 24-h exercise, plasma levels of branched-chain (BCAA), essential amino acids (EAA) and glutamine fell 13%, 14% and 19% (P<0.05) respectively, whereas their concentrations in muscle were unaltered. Simultaneously, tyrosine and phenylalanine levels rose 38% and 50% (P<0.05) in the plasma and 66% and 46% (P<0.05) in muscle, respectively. After the 24-h exercise, plasma levels of BCAA were positively correlated with muscle levels of glycogen (r2=0.73, P<0.05), as was the combined concentrations of muscle tyrosine and phenylalanine with plasma creatine kinase (r2=0.55, P<0.05). Following 28-h of recovery, plasma and muscle levels of amino acids had either returned to their initial levels or were elevated. In conclusion, ultra-endurance exercise caused significant changes elevations in plasma and muscle levels of tyrosine and phenylalanine, which suggest an increase in net muscle protein breakdown during exercise. There was a reduction in plasma concentrations of EAA and glutamine during exercise, whereas no changes were detected in their muscle concentration after exercise.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Fysiologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Physiology (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Hälsovetenskap -- Näringslära (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Health Sciences -- Nutrition and Dietetics (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Hälsovetenskap -- Idrottsvetenskap (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Health Sciences -- Sport and Fitness Sciences (hsv//eng)
Nyckelord
- Adventure racing
- branched-chained amino acids
- creatine kinase
- phenylalanine
- skeletal muscle
- tyrosine
- Physiology
- Fysiologi
- Nutrition
- Näringslära
- Sports
- Idrott
- Medicin/Teknik
- Medicine/Technology
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas