TY  - JOUR
A1  - Zinke, Fridolin
A1  - Warnke, Torsten
A1  - Gäbler, Martijn
A1  - Granacher, Urs
T1  - Effects of Isokinetic Training on Trunk Muscle Fitness and Body Composition in World-Class Canoe Sprinters
JF  - Frontiers in Physiology
N2  - In canoe sprint, the trunk muscles play an important role in stabilizing the body in an unstable environment (boat) and in generating forces that are transmitted through the shoulders and arms to the paddle for propulsion of the boat. Isokinetic training is well suited for sports in which propulsion is generated through water resistance due to similarities in the resistive mode. Thus, the purpose of this study was to determine the effects of isokinetic training in addition to regular sport-specific training on trunk muscular fitness and body composition in world-class canoeists and to evaluate associations between trunk muscular fitness and canoe-specific performance. Nine world-class canoeists (age: 25.6 ± 3.3 years; three females; four world champions; three Olympic gold medalists) participated in an 8-week progressive isokinetic training with a 6-week block “muscle hypertrophy” and a 2-week block “muscle power.” Pre- and post-tests included the assessment of peak isokinetic torque at different velocities in concentric (30 and 140∘s-1) and eccentric (30 and 90∘s-1) mode, trunk muscle endurance, and body composition (e.g., body fat, segmental lean mass). Additionally, peak paddle force was assessed in the flume at a water current of 3.4 m/s. Significant pre-to-post increases were found for peak torque of the trunk rotators at 30∘s-1 (p = 0.047; d = 0.4) and 140∘s-1 (p = 0.014; d = 0.7) in concentric mode. No significant pre-to-post changes were detected for eccentric trunk rotator torque, trunk muscle endurance, and body composition (p > 0.148). Significant medium-to-large correlations were observed between concentric trunk rotator torque but not trunk muscle endurance and peak paddle force, irrespective of the isokinetic movement velocity (all r ≥ 0.886; p ≤ 0.008). Isokinetic trunk rotator training is effective in improving concentric trunk rotator strength in world-class canoe sprinters. It is recommended to progressively increase angular velocity from 30∘s-1 to 140∘s-1 over the course of the training period.
KW  - peak torque
KW  - canoe racing
KW  - core strength
KW  - sport-specific performance
KW  - elite athletes
Y1  - 2019
U6  - https://doi.org/10.3389/fphys.2019.00021
SN  - 1664-042X
VL  - 10
PB  - Frontiers Research Foundation
CY  - Lausanne
ER  - 
TY  - JOUR
A1  - Coppalle, Sullivan
A1  - Rave, Guillaume
A1  - Abderrahman, Abderraouf Ben
A1  - Ali, Ajmol
A1  - Salhi, Iyed
A1  - Zouita, Sghaier
A1  - Zouita, Amira
A1  - Brughelli, Matt
A1  - Granacher, Urs
A1  - Zouhal, Hassane
T1  - Relationship of Pre-season Training Load With In-Season Biochemical Markers, Injuries and Performance in Professional Soccer Players
JF  - Frontiers in Physiology
N2  - There is controversy in the literature in regards of the link between training load and injury rate. Thus, the aims of this non-interventional study were to evaluate relationships between pre-season training load with biochemical markers, injury incidence and performance during the first month of the competitive period in professional soccer players.
KW  - elite athletes
KW  - global positioning system
KW  - monitoring
KW  - blood sample
KW  - football
Y1  - 2019
U6  - https://doi.org/10.3389/fphys.2019.00409
SN  - 1664-042X
VL  - 10
PB  - Frontiers Research Foundation
CY  - Lausanne
ER  -