How soon after rinse can clients go to the gym without wrecking the tan?

Sweat is the enemy while the tan is still settling into the upper layers. I tell most people: rinse as directed, moisturise lightly, then avoid a heavy sweat session for at least the rest of that day — ideally until the following morning if they can wait.

If they must train sooner, cooler workouts, breathable kit, and a quick cool rinse (no scrubbing) afterwards help. Chest, shoulder blades and lower back patch first because kit rubs there.

Written aftercare beats a verbal “you’ll be fine” — gym-regulars will push the boundary otherwise.