Table 2.
Intervention components according to training prescription guidelines.
| References | Strength | Plyometrics | Stability | Speed/agility | Coordination / warm-up drills | Flexibility |
|---|---|---|---|---|---|---|
| Achenbach et al. [64] | ✓ | ✓ | ✓ | x | x | x |
| Åkerlund et al. [65] | ✓ | ✓ | ✓ | x | x | x |
| Al Attar et al. [62] | ✓ | ✓ | ✓ | x | x | x |
| Azuma and Someya [19] | x | x | x | x | x | ✓ |
| Barboza et al. [66] | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Emery et al. [14] | ✓ | ✓ | ✓ | x | ✓ | ✓ |
| Emery et al. [13] | x | x | ✓ | x | x | ✓ |
| Hislop et al. [67] | ✓ | ✓ | ✓ | ✓ | x | x |
| Imai et al. [20] | x | x | ✓ | x | x | x |
| Junge et al. [53] | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Longo et al. [65] | ✓ | ✓ | ✓ | ✓ | ✓ | x |
| Olsen et al. [55] | ✓ | ✓ | ✓ | ✓ | ✓ | x |
| Owoeye et al. [56] | ✓ | ✓ | ✓ | ✓ | ✓ | x |
| Rössler et al. [12] | ✓ | ✓ | ✓ | x | x | x |
| Soligard et al. [11] | ✓ | ✓ | ✓ | ✓ | ✓ | x |
| Steffen et al. [57] | ✓ | ✓ | ✓ | ✓ | x | x |
| Verhagen et al. [63] | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Wedderkopp et al. [58] | ✓ | x | ✓ | x | x | x |
| Zarei et al. [59] | ✓ | ✓ | ✓ | ✓ | ✓ | x |
| Zarei et al. [60] | ✓ | ✓ | ✓ | x | x | x |
| Zouita et al. [61] | ✓ | x | x | x | x | x |
Articles that included strength, plyometric, stability, speed/agility, coordination/warm-up drills, and flexibility components were assessed to determine if they met training prescription recommendations to reach an effective stimulus. ✓ symbols in a green cell indicate the article met the muscular strength (included at least 2 sets, 8–15 repetitions or 20–30 s duration AND one progression (i.e. increased intensity/difficulty)) [22], plyometric (included at least 1 set, 3–15 repetitions or 10–30 s duration, AND one progression (i.e. increased intensity/difficulty)) [22], stability (included at least 240 s of stability training per session AND one progression (i.e. increased intensity/difficulty)) [36], speed/agility (included sprint-specific training exercises (unresisted/resisted forward and backward running with or without change of direction) between 10 and 30 m of distance) [37], coordination/warm-up drills (included at least 180 s of warm-up drills (e.g. skipping, heel flicks)) [38], and flexibility (included at least 1 stretch, 30 s duration (static) or 15 reps (dynamic/ballistic techniques) per session) [39] recommendations, while ✓ symbols in an orange cell indicate they did not meet these recommendations (or did not provide information about volume/intensity). x symbols in a red cell indicate that the intervention did not include this component. Only those components marked with ✓ symbols in green cells were considered when the restrictive approach was applied.