Table 2. Six-week progression of High-Intensity Interval Training and Small-Sided Game (HIIT&SSG) Intervention. Week Component Sets Duration per Set Intensity / Format Recovery Between Sets 1-2 Small-Sided Game (2v2) 2 2 minutes 20x15m pitch, mini-goals, no offside, target RPE 8-9 2 minutes active recovery High-Intensity Runs 2 2 minutes 85% VIFT (continuous) 3 minutes passive recovery 3-4 Small-Sided Game (2v2) 3 2 minutes 20x15m pitch, mini-goals, no offside, target RPE 8-9 90 seconds active recovery High-Intensity Runs 3 2 minutes 85% VIFT (continuous) 3 minutes passive recovery 5-6 Small-Sided Game (2v2) 3 3 minutes 20x15m pitch, mini-goals, no offside, target RPE 8-9 90 seconds active recovery High-Intensity Runs 3 3 minutes 85% VIFT (continuous) 2.5 minutes passive recovery RPE: rating of perceived exertion; VIFT: Final Velocity achieved during the 30-15 Intermittent Fitness Test