After a scuba dive, can we do a free dive course? Or vice versa?
If you are freediving after scuba diving the two rules below will keep you safe:
- At least 12 hours after one scuba dive before freediving
- At least 24 hours after multiple scuba dives before freediving
After scuba diving, the body has accumulated Nitrogen. If you freedive the quick pressure changes of the freedive can lead this gas to cause decompression sickness and this is why you need to wait before freediving.
If you are scuba diving after freediving, even if at the moment there is no conclusive survey on the subject, there is still a small accumulation of Nitrogen in the body. Hence it is highly recommended to wait a minimum of 12 hours before scuba diving after freediving.