LOS ANGELES -- Quentin Johnston was confused.

Ahead of the Los Angeles Chargers ' 2025 preseason game against the New Orleans Saints , one in which none of the starters were playing, he watched as quarterback Justin Herbert sprinted back and forth 25 yards a few times, then took a brief break before repeating.

Eventually, Johnston realized that Herbert was doing the team's conditioning test, a rigorous running assessment players must pass at the start of training camp to prove they are in shape. As a part of that test, they run 150 yards six times, split into six 25-yard back-and-forth sprints, breaking for 40 seconds after each 150.

The amount of sets, reps and rest periods varies by position group, but it's a test that most players dread when they return for the beginning of

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