| Steffen et al. (23) |
F |
2020 |
Average 15.4 ± 0.8 |
1073 athletes in the intervention group and 947 athletes in the control group. Intervention implemented from April to October 2005. |
There was no statistically significant difference between the injury rate of the intervention group (3.6/1000 h) and the control group (3.7/1000 h). |
| Soligard et al. (10) |
F |
1892 |
13–17 |
1055 athletes in the intervention group and 837 athletes in the control group. Intervention implemented from March to October 2007. |
264 players suffered injuries: 121 players in the intervention group and 143 players in the control group, during one season (8 months). |
| Junge et al. (21) |
ND |
ND |
ND |
In 2005, 5549 amateur team coaches from the Swiss Football Federation (FSF) received information materials and training, and were requested to implement the FIFA 11+ in the training routine. |
In 2008,the programme was constantly carried out by 57% of the coaches. Those teams who performed the programme had an incidence of injury 11.5% lower during matches and 25.3% lower during training, when compared with teams that did not perform the programme. On average, the teams would train twice a week and play one match per week. |
| Soligard et al. (16) |
F |
1892 |
13–17 |
Intervention implemented from March to October 2007. 837 athletes in the control group and 1055 athletes in the intervention group. |
The risk of injury dropped 35% when comparing those athletes who performed on average 1.5 sessions of the programme FIFA 11+ per week and those athletes who performed 0.7 sessions per week. |
| Beijsterveldt et al. (24) |
M |
ND |
18–40 |
Control group composed of 155 athletes from 12 clubs and intervention group composed of 155 athletes from 12 clubs. The “FIFA 11+” programme was performed 2 to 3 times a week during an entire season. |
During training and matches the incidence of injuries and their severity were lower in the intervention group, as well as the costs of treatment in athletes who suffered injuries. |
| Gatterer et al. (25) |
M |
ND |
ND |
Three amateur soccer teams, two in the 6th Italian division, were divided into a control and an intervention group to perform the FIFA 11+, programme. Another team was in the 7th division. During the first round of the national competition. |
The total injury rate for intervention in the control team in the 6th division was 3.3 injuries/1000 h ( (CI 0.7–5.9) and 4.3 injuries/1000 h (IC 1.3–7.3), respectively. Relative risk was 2 times higher in the 7th division club when compared with 6th division team. |
| Grooms et al. (26) |
M |
41 |
18–25 |
A high-school soccer team was followed-up for 2 seasons. The first season was considered control and the second was an intervention season, with performance of the FIFA 11+ programme. |
The intervention season had reductions in the relative risk (RR) of lower extremity injury of 72% (RR = 0.28, CI95% = 0.09, 0.85). |
| Steffen et al. (27) |
F |
226 |
13–18 |
The control group was composed of 80 athletes whose coaches did not follow the FIFA11+ programme. The intervention group (I) was composed of 68 athletes. The coaches in this group were previously trained on how to carry out the FIFA 11+ programme. The coaches of the intervention group (II) were trained on how to perform the FIFA 11+ programme and the group was also followed-up by a physical therapist. During the 2011 season (May–August). |
The risk of injury was lower among those players who showed high adherence to the FIFA11+ programme, intervention group (II). |
| Daneshjoo et al. (28) |
M |
36 |
17–19 |
Players were divided into 3 groups: FIFA 11+, HarmoKnee and control (n = 12 in each group). These exercises were performed 3 times a week for 2 months (24 sessions). The study assessed ratios associated with the risk of knee injuries in soccer players (conventional strength ratio [CSR], dynamic control ratio [DCR] and fast/slow ratio [FSR]). |
The FIFA 11+ programme improved the CSR and FSR, and thus prevented the possibility of knee injuries in soccer players. The HarmoKnee programme showed no improvements. |
| Daneshjoo et al. (29) |
M |
36 |
17–19 |
Players were divided into 3 groups: FIFA 11+, HarmoKnee and control (n = 12 in each group). These exercises were performed 3 times a week for 2 months (24 sessions). Proprioception was assessed bilaterally in 30°, 45° and 60° knee flexion using the Biodex isokinetic dynamometer. Static and dynamic balance were assessed using the stork stand test and the Star Excursion Balance Test (Sebt), respectively. |
The static balance with eyes closed significantly increased in the 11+ by 12.4% and in the HarmoKnee by 17.6% Both programmes improved proprioception in 45° and 60° knee flexion (~1%). |
| Kilding et al. (30) |
M |
24 |
9–12 |
12 athletes composed the experimental group and 12 athletes composed the intervention group. The experimental group performed the FIFA 11+ five times a week during 6 weeks. Before and after the intervention, both groups performed a battery of soccer-specific physical tests. |
No injuries were observed in both groups during the study. There was a 72% compliance with the intervention. Most players found the FIFA 11+ to be beneficial, but not pleasant in the prescribed format. There have been improvements in physical performance and leg power (3-steps jump and countermovement jump) increased significantly (3.4 and 6.0%, respectively). There was also a 2% improvement in the 20-m speed test. |
