Title |
Maximal voluntary contraction force, SR function and glycogen resynthesis during the first 72 h after a high-level competitive soccer game
|
---|---|
Published in |
European Journal of Applied Physiology, March 2011
|
DOI | 10.1007/s00421-011-1919-y |
Pubmed ID | |
Authors |
Peter Krustrup, Niels Ørtenblad, Joachim Nielsen, Lars Nybo, Thomas P. Gunnarsson, F. Marcello Iaia, Klavs Madsen, Francis Stephens, Paul Greenhaff, Jens Bangsbo |
Abstract |
The aim of this study was to examine maximal voluntary knee-extensor contraction force (MVC force), sarcoplasmic reticulum (SR) function and muscle glycogen levels in the days after a high-level soccer game when players ingested an optimised diet. Seven high-level male soccer players had a vastus lateralis muscle biopsy and a blood sample collected in a control situation and at 0, 24, 48 and 72 h after a competitive soccer game. MVC force, SR function, muscle glycogen, muscle soreness and plasma myoglobin were measured. MVC force sustained over 1 s was 11 and 10% lower (P < 0.05) after 0 and 24 h, respectively, compared with control. The rate of SR Ca(2+) uptake at 800 nM [Ca(2+)](free) was lower (P < 0.05) after 0 h (2.5 μmol Ca(2+) g prot(-1) min(-1)) than for all other time points (24 h: 5.1 μmol Ca(2+) g prot(-1) min(-1)). However, SR Ca(2+) release rate was not affected. Plasma myoglobin was sixfold higher (P < 0.05) immediately after the game, but normalised 24 h after the game. Quadriceps muscle soreness (0-10 VAS-scale) was higher (P < 0.05) after 0 h (3.6), 24 h (1.8), 48 h (1.1) and 72 h (1.4) compared with control (0.1). Muscle glycogen was 57 and 27% lower (P < 0.001) 0 and 24 h after the game compared with control (193 and 328 vs. 449 mmol kg d w(-1)). In conclusion, maximal voluntary contraction force and SR Ca(2+) uptake were impaired and muscle soreness was elevated after a high-level soccer game, with faster recovery of SR function in comparison with MVC force, soreness and muscle glycogen. |
X Demographics
Geographical breakdown
Country | Count | As % |
---|---|---|
United Kingdom | 16 | 17% |
United States | 7 | 8% |
Saudi Arabia | 5 | 5% |
Spain | 4 | 4% |
Denmark | 3 | 3% |
Colombia | 2 | 2% |
Qatar | 2 | 2% |
Argentina | 2 | 2% |
Australia | 2 | 2% |
Other | 14 | 15% |
Unknown | 35 | 38% |
Demographic breakdown
Type | Count | As % |
---|---|---|
Members of the public | 60 | 65% |
Practitioners (doctors, other healthcare professionals) | 17 | 18% |
Scientists | 14 | 15% |
Unknown | 1 | 1% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
Netherlands | 2 | <1% |
Portugal | 1 | <1% |
Brazil | 1 | <1% |
United Kingdom | 1 | <1% |
Denmark | 1 | <1% |
Unknown | 268 | 98% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Student > Master | 56 | 20% |
Student > Bachelor | 41 | 15% |
Student > Ph. D. Student | 31 | 11% |
Researcher | 21 | 8% |
Student > Doctoral Student | 16 | 6% |
Other | 49 | 18% |
Unknown | 60 | 22% |
Readers by discipline | Count | As % |
---|---|---|
Sports and Recreations | 138 | 50% |
Medicine and Dentistry | 24 | 9% |
Nursing and Health Professions | 15 | 5% |
Agricultural and Biological Sciences | 8 | 3% |
Social Sciences | 7 | 3% |
Other | 15 | 5% |
Unknown | 67 | 24% |