We had been diving for five straight days (2 to 3 dives per day), and apart from the that, I had not exercised at all. Strenuous activity shortly after SCUBA diving increases the chances of getting DCS or IPO.
We had two days of deco before flying back home, so I took my chance to go for a run. Nothing too strenuous, and nothing super far. Just getting my running muscles back in the action after few days off.
