Exercise intensity inferred from air consumption during recreational scuba diving
Introduction: Episodic exercise is a risk factor for acute cardiac events and cardiac complications are increasingly recognized in fatalities during recreational scuba diving. What is not known is the exercise intensity involved in typical recreational diving. Methods: This study used pre- to post-d...
| Main Authors: | , , |
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| Format: | Journal Article |
| Published: |
2014
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| Online Access: | http://hdl.handle.net/20.500.11937/71958 |
| _version_ | 1848762620441526272 |
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| author | Buzzacott, Peter Pollock, N. Rosenberg, M. |
| author_facet | Buzzacott, Peter Pollock, N. Rosenberg, M. |
| author_sort | Buzzacott, Peter |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Introduction: Episodic exercise is a risk factor for acute cardiac events and cardiac complications are increasingly recognized in fatalities during recreational scuba diving. What is not known is the exercise intensity involved in typical recreational diving. Methods: This study used pre- to post-dive gas cylinder pressure drop to estimate air consumption and, from that, exercise intensity during recreational dives. Dive profiles were captured electronically and divers self-reported cylinder pressure changes, perceived workload, thermal status and any problems during dives. Mean surface air consumption (SAC) rate per kg body weight and mean exercise intensity (reported in metabolic equivalents, MET, multiples of assumed resting metabolic rate of 3.5 mL·kg-1·min-1) were then estimated. Data are reported as mean ± standard deviation. Results: A total of 959 recreational air dives (20 ± 9 metres' sea water maximum depth; 50 ± 12 min underwater time) by 139 divers (42 ± 10 y age; 11 ± 10 y of diving; 12% smokers; 73% male) were monitored. Problems were reported with 129/959 dives: buoyancy (45%), equalization (38%), rapid ascent (10%), vertigo (5%) and other (2%). Assuming a 10% overestimate due to cylinder cooling and uncontrolled gas loss, the estimated exercise intensity associated with monitored dives was 5 ± 1 MET. Mean ± 2SD, or 7 MET, captures the effort associated with the vast majority of dives monitored. Conclusion: Our estimates suggest that uncomplicated recreational dives require moderate-intensity energy expenditure to complete, with a 7-MET capacity generally adequate. Higher levels of aerobic fitness are still strongly recommended to ensure ample reserves. Further research is needed to quantify energetic demands of recreational diving during both typical and emergent events in both experienced and less experienced divers. |
| first_indexed | 2025-11-14T10:50:28Z |
| format | Journal Article |
| id | curtin-20.500.11937-71958 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:50:28Z |
| publishDate | 2014 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-719582018-12-13T09:11:58Z Exercise intensity inferred from air consumption during recreational scuba diving Buzzacott, Peter Pollock, N. Rosenberg, M. Introduction: Episodic exercise is a risk factor for acute cardiac events and cardiac complications are increasingly recognized in fatalities during recreational scuba diving. What is not known is the exercise intensity involved in typical recreational diving. Methods: This study used pre- to post-dive gas cylinder pressure drop to estimate air consumption and, from that, exercise intensity during recreational dives. Dive profiles were captured electronically and divers self-reported cylinder pressure changes, perceived workload, thermal status and any problems during dives. Mean surface air consumption (SAC) rate per kg body weight and mean exercise intensity (reported in metabolic equivalents, MET, multiples of assumed resting metabolic rate of 3.5 mL·kg-1·min-1) were then estimated. Data are reported as mean ± standard deviation. Results: A total of 959 recreational air dives (20 ± 9 metres' sea water maximum depth; 50 ± 12 min underwater time) by 139 divers (42 ± 10 y age; 11 ± 10 y of diving; 12% smokers; 73% male) were monitored. Problems were reported with 129/959 dives: buoyancy (45%), equalization (38%), rapid ascent (10%), vertigo (5%) and other (2%). Assuming a 10% overestimate due to cylinder cooling and uncontrolled gas loss, the estimated exercise intensity associated with monitored dives was 5 ± 1 MET. Mean ± 2SD, or 7 MET, captures the effort associated with the vast majority of dives monitored. Conclusion: Our estimates suggest that uncomplicated recreational dives require moderate-intensity energy expenditure to complete, with a 7-MET capacity generally adequate. Higher levels of aerobic fitness are still strongly recommended to ensure ample reserves. Further research is needed to quantify energetic demands of recreational diving during both typical and emergent events in both experienced and less experienced divers. 2014 Journal Article http://hdl.handle.net/20.500.11937/71958 restricted |
| spellingShingle | Buzzacott, Peter Pollock, N. Rosenberg, M. Exercise intensity inferred from air consumption during recreational scuba diving |
| title | Exercise intensity inferred from air consumption during recreational scuba diving |
| title_full | Exercise intensity inferred from air consumption during recreational scuba diving |
| title_fullStr | Exercise intensity inferred from air consumption during recreational scuba diving |
| title_full_unstemmed | Exercise intensity inferred from air consumption during recreational scuba diving |
| title_short | Exercise intensity inferred from air consumption during recreational scuba diving |
| title_sort | exercise intensity inferred from air consumption during recreational scuba diving |
| url | http://hdl.handle.net/20.500.11937/71958 |