Correction to: Diving ergospirometry with suspended weights: breathing- and fin-swimming style matter

Purpose

Scuba diving is a complex condition including elevated ambient pressure, limited air supply, increased breathing work, and unfamiliar fin-swimming. Earlier approaches to assess diving specific data did not comprehensively address these aspects. We first present an underwater ergospirometry system and then test the hypothesis that both breathing characteristics and fin-swimming style affect the air consumption.

Results

Ergo group: linear heart rate and oxygen uptake ([Formula: see text]O2) increases with both 50 W-bicycle steps and suspended-weights ergometry (r = 0.97). During hyperbaric conditions, [Formula: see text]E was less increased versus normobaric conditions. Style group: the more efficient hip/thigh-oriented style shifted towards the knee/calf-oriented style. [Formula: see text]E and [Formula: see text]O2 were higher in beginners (< 100 dives) versus advanced divers (≥ 100 dives). Significant differences on the 5 kg-step: [Formula: see text]E: 31.5 ± 7.1 l/min vs. 23.7 ± 5.9 l/min and [Formula: see text]O2: 1.6 ± 0.3 l/min vs. 1.2 ± 0.3 l/min. A comparison is presented, in addition to illustrate the impact of differences in breathing characteristics and fin-swimming style.

Conclusions

Diving ergospirometry with suspended weights in a hyperbaric chamber allows for comprehensive studies. Little diving experience in terms of breathing characteristics and fin-swimming style significantly increases [Formula: see text]E thereby increasing the risk of running-out-of-air.

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