TY - JOUR
T1 - Skeletal muscle and performance adaptations to high-intensity training in elite male soccer players
T2 - speed endurance runs versus small-sided game training
AU - Fransson, Dan
AU - Nielsen, Tobias Schmidt
AU - Olsson, Karl
AU - Christensson, Tobias
AU - Bradley, Paul S
AU - Fatouros, Ioannis G
AU - Krustrup, Peter
AU - Nordsborg, Nikolai Baastrup
AU - Mohr, Magni
N1 - CURIS 2018 NEXS 019
PY - 2018/1/1
Y1 - 2018/1/1
N2 - Purpose: To examine the skeletal muscle and performance responses across two different exercise training modalities which are highly applied in soccer training. Methods: Using an RCT design, 39 well-trained male soccer players were randomized into either a speed endurance training (SET; n = 21) or a small-sided game group (SSG; n = 18). Over 4 weeks, thrice weekly, SET performed 6–10 × 30-s all-out runs with 3-min recovery, while SSG completed 2 × 7–9-min small-sided games with 2-min recovery. Muscle biopsies were obtained from m. vastus lateralis pre and post intervention and were subsequently analysed for metabolic enzyme activity and muscle protein expression. Moreover, the Yo–Yo Intermittent Recovery level 2 test (Yo–Yo IR2) was performed. Results: Muscle CS maximal activity increased (P < 0.05) by 18% in SET only, demonstrating larger (P < 0.05) improvement than SSG, while HAD activity increased (P < 0.05) by 24% in both groups. Na+–K+ ATPase α1 subunit protein expression increased (P < 0.05) in SET and SSG (19 and 37%, respectively), while MCT4 protein expression rose (P < 0.05) by 30 and 61% in SET and SSG, respectively. SOD2 protein expression increased (P < 0.05) by 28 and 37% in SET and SSG, respectively, while GLUT-4 protein expression increased (P < 0.05) by 40% in SSG only. Finally, SET displayed 39% greater improvement (P < 0.05) in Yo–Yo IR2 performance than SSG. Conclusion: Speed endurance training improved muscle oxidative capacity and exercise performance more pronouncedly than small-sided game training, but comparable responses were in muscle ion transporters and antioxidative capacity in well-trained male soccer players.
AB - Purpose: To examine the skeletal muscle and performance responses across two different exercise training modalities which are highly applied in soccer training. Methods: Using an RCT design, 39 well-trained male soccer players were randomized into either a speed endurance training (SET; n = 21) or a small-sided game group (SSG; n = 18). Over 4 weeks, thrice weekly, SET performed 6–10 × 30-s all-out runs with 3-min recovery, while SSG completed 2 × 7–9-min small-sided games with 2-min recovery. Muscle biopsies were obtained from m. vastus lateralis pre and post intervention and were subsequently analysed for metabolic enzyme activity and muscle protein expression. Moreover, the Yo–Yo Intermittent Recovery level 2 test (Yo–Yo IR2) was performed. Results: Muscle CS maximal activity increased (P < 0.05) by 18% in SET only, demonstrating larger (P < 0.05) improvement than SSG, while HAD activity increased (P < 0.05) by 24% in both groups. Na+–K+ ATPase α1 subunit protein expression increased (P < 0.05) in SET and SSG (19 and 37%, respectively), while MCT4 protein expression rose (P < 0.05) by 30 and 61% in SET and SSG, respectively. SOD2 protein expression increased (P < 0.05) by 28 and 37% in SET and SSG, respectively, while GLUT-4 protein expression increased (P < 0.05) by 40% in SSG only. Finally, SET displayed 39% greater improvement (P < 0.05) in Yo–Yo IR2 performance than SSG. Conclusion: Speed endurance training improved muscle oxidative capacity and exercise performance more pronouncedly than small-sided game training, but comparable responses were in muscle ion transporters and antioxidative capacity in well-trained male soccer players.
KW - Antioxidant capacity
KW - Intermittent exercise
KW - Muscle fatigue
KW - Muscle oxidative capacity
KW - Na+-K+ ATPase activity
KW - Football
U2 - 10.1007/s00421-017-3751-5
DO - 10.1007/s00421-017-3751-5
M3 - Journal article
C2 - 29119246
SN - 1439-6319
VL - 118
SP - 111
EP - 121
JO - European Journal of Applied Physiology
JF - European Journal of Applied Physiology
IS - 1
ER -