GPS units are now common even at lower levels, and they produce more numbers than most coaches can use. A few metrics carry most of the useful information.
Total distance gives a rough picture of volume but says little about intensity
High-speed running and sprint distance relate more closely to hamstring load
Accelerations and decelerations capture the mechanical load of changes of direction
Thresholds (for example what counts as “high speed”) differ between systems and teams, so compare numbers only within the same system
A simple use of GPS: compare each player’s week to their own recent weeks rather than to teammates. A centre-back and a wide player will never have the same sprint numbers.
Large week-to-week jumps, especially in sprint distance after a quiet period, are worth noticing and smoothing out.