FSI Football Science Update

Testing the effects of 4-week training programs based on extreme and medium-sided soccer games: a study focusing on change-of-direction, vertical jump height and locomotor profile.

Makar P(1), Praça G(2), Kawczyński A(1), Akyildiz Z(3), Yıldız M(4), Aquino R(5), Clemente FM(6)(7)(8).

BMC Sports Sci Med Rehabil. 2022 Nov 24;14(1):199. doi: 10.1186/s13102-022-00592-1

This study compared the effects of two training programs: extreme sided-games of 1v1 vs. medium-sided games of 5v5 in 20 male regional-level young soccer players during 4 weeks. Both groups improved countermovement jump (CMJ), and final velocity in the 30-15 Intermittent Fitness test (VIFT), but only the 1v1 group improved the 5-0-5 test 180 degrees change-of-direction time.


Team’s Average Acute:Chronic Workload Ratio Correlates with Injury Risk in NCAA Men’s Soccer Team.

Bakal DR(1), Friedrich TR(2), Keane G(1), White B(3), Roh EY(1).

PM R. 2022 Nov 21. doi: 10.1002/pmrj.12923

This study retrospectively evaluated injury and workload data (total distance, high-speed distance, accelerations, player load, and average velocity) for all players (n=23) of an NCAA men’s soccer team during one 18-week season. Trainings/games with injuries had higher acute (last 3 days) workloads, lower chronic (last 28 days) workloads, and higher ACWRs for all 5 workload variables. Risk factors for injury included a low chronic workload for total distance (OR 7.23) and an ACWR >1.4 for accelerations (OR 4.34). This suggests that methods of decreasing injury risk in soccer can consider maintaining a consistent chronic workload for total distance and avoiding elevations in the ACWR for accelerations.


The influence of short sprint performance, acceleration, and deceleration mechanical properties on change of direction ability in soccer players-A cross-sectional study.

Zhang Q(1)(2), Dellal A(2)(3)(4), Chamari K(5)(6), Igonin PH(2)(7), Martin C(2), Hautier C(2).

Front Physiol. 2022 Nov 2;13:1027811. doi: 10.3389/fphys.2022.1027811. eCollection 2022

This study in 103 French male and female soccer players investigated the relationship between short sprint, acceleration and deceleration performance with the 180 degrees change of direction performance measured with the 505-test. Only the 10m sprint performance (strongly) and the maximum deceleration power (moderately) were associated with the 180 degrees turning performance.


Are EPB41 and alpha-synuclein diagnostic biomarkers of sport-related concussion?Findings from the NCAA and Department of Defense CARE Consortium.

Vorn R(1), Devoto C(2), Meier TB(3), Lai C(2), Yun S(4), Broglio SP(5), Mithani S(6), McAllister TW(7), Giza CC(8), Kim HS(2), Huber D(3), Harezlak J(9), Cameron KL(10), McGinty G(11), Jackson J(11), Guskiewicz KM(12), Mihalik JP(12), Brooks A(13), Duma S(14), Rowson S(14), Nelson LD(3), Pasquina P(15), McCrea MA(3), Gill JM(16); CARE Consortium Investigators.

J Sport Health Sci. 2022 Nov 17:S2095-2546(22)00114-4. doi: 10.1016/j.jshs.2022.11.007

This study of blood markers 6 hours after concussion found 338 plasma proteins that significantly differed in abundance (319 upregulated and 19 downregulated) in 140 concussed athletes compared to 21 non-concussed athletes. The combination of erythrocyte membrane protein band 4.1 (EPB41) and alpha-synuclein (SNCA) provided a perfect AUC (1.000), which suggests that this combination of plasma biomarkers is best for diagnosing concussion in athletes after 6 hours of injury.