Activity

Players
Per side
v
Neutrals
Keepers

Space
Shape

Walk it out with Measure

Timing
On
Off
Reps
Sets

How this is calculated

Space: the standard 105 × 68 m pitch (IFAB Laws of the Game, Law 1) scaled by players per side ÷ 11. Keepers stay in goal, so they don't move the space. Timing: fitted lines through the ranges in the small-sided-games literature (Hill-Haas et al. 2011, Sports Medicine). Ranges, not laws — the constants are in the page's source, and your session load, the players, and where this sits in the night move you within them.