2 ms·
In diving, the main factor in determing air use (SAC rate if we want to use diving termonology) is work load. The more a person is relaxed and in rest, the lowe
by belorn 3y ago
In diving, the main factor in determing air use (SAC rate if we want to use diving termonology) is work load. The more a person is relaxed and in rest, the lower the respitory rate will be. The more excertion a person do, like fighting a current, the higher it will be.
A smaller profile will also help in reducing drag. A smaller frame also need less air in their suit (both dry and wetsuit). This is likely however to impact resistance to cold.
- CobaltFire 3y agoWhile true this is orthogonal to the fact that for a given workload females seem to be more efficient. That said, they generally have less capability for work at the same mass. There seems to be a trade off between efficiency and power density, which is what this study is probably getting at.
- belorn 3y agoReading the article, it is unclear if they are comparing similar workloads. The article seems more focus on similar goals. There are likely interesting differences based on density and base body functions that scale in non-linear ways. I expect however that all those would be minor gains compared to exertion rate, especially when it comes to oxygen consumption. If we use diving again as an example, a person just floating still will be using less than half the oxygen compared to a person swimming against a mild current. Heavy work can easily go past 4x or higher compared to the oxygen consumption of a person in rest, which is a major problem for rebreather divers who are limited by their equipment in term of scrubbing co2 (for every 1x of oxygen consumed, 0.9x of co2 is produced).