The effects of Dehydration on Freedivers during Adventure Freediving

06 October 2023

Dehydration and Freediving

Apnea Addicts Freediving School

Freediving - Understanding Equalization

Active Dehydration during Freediving

Freediving is a challenging and strenuous activity that requires a high level of physical and mental fitness. Dehydration, which is the state of insufficient water in the body, can have detrimental effects on physiological processes and physical performance. This review aims to provide an overview of the physiological mechanisms associated with dehydration in the context of freediving, as well as its effects on freediving performance. Additionally, the review discusses strategies for maintaining hydration during adventure freediving and suggests areas for future research. The review highlights the importance of adequate hydration for optimal performance in freediving, and the need for further research in this area.

KeatZA
KeatZA
Brilliant instructors. The Apnea Addicts team look after you through the entire process and ensure that you are comfortable in the water and understand the fundamentals of the sport.
Reece Truter
Reece Truter
One of the best experiences I have had with a dive shop. I was blown away by how beautiful the African Sea Forest was and had many amazing dives from shore entry and off a boat all during my freediving course and improving my skills, reaching new depths and learning how to do it all safely.
Amber McLeod
Amber McLeod
Charl and Brit are amazing instructors 🙂 Doing my freediving instructor course with them. Super patient people and they have very adaptable teaching styles that will suit anyone. Very fun course!
Leroux Cloete
Leroux Cloete
Best in the business, took my free diving to the next level and will recommend it to anyone looking to dive safer and improve their diving.
YB Naidoo
YB Naidoo
Gareth did such an amazing job with Mischka, he reads people extremely accurately and helps them accordingly. I seriously recommend Gareth and his team if you value patience and understanding. Thanks for the breathtaking experience guys, well done!
Boy de Jonge
Boy de Jonge
Did my 4 day Open Water Course, both Gareth and Indi are very nice, highly qualified and know where to go for the best Cape Town dive spots. Highly recommend!
Jonathan Müller
Jonathan Müller
Great communication. Great instructor. My son loved it.

Paradise42498870172
Paradise42498870172
2023-11-09
Amazing diving and skill improving. I had such an amazing time in Cape Town while being shown around with Apnea Addicts Freediving. We visited many dive sites via shore and boat. All while improving my diving skills on freediving courses.
GoPlaces67263033124
GoPlaces67263033124
2023-11-07
Amazing Charl and Brit are amazing instructors 🙂 Doing my freediving instructor course with them and they have very adaptable teaching styles that will suit anyone. Very fun course!
Passport38210741530
Passport38210741530
2023-11-07
Spear fishing trip Beautiful waters and friendly cow sharks + friendly charles. Will recommend this to anyone. Gona come back again for sure.
Leroux C
Leroux C
2023-11-07
If you are a free diver this is a must!!! Best in the business, took my free diving to the next level and will recommend it to anyone looking to dive safer and improve their diving.
Charl Marais
Charl Marais
2022-12-31
Super Cool Diving!! I was reccomended to this center for my diving, they are PADI IDC Freedive Instructor Trainer and Scuba Centre based in Simonstown. Working with one of the only PADI Freedive and Mermaid instructor-trainers in Southern Africa. The quality of diving and teaching that I did here was incredible, the life under the water was very cool!. Whether you are interested in scuba diving, freediving, snorkeling, boat tours or freediving – CTDC put together a personal package for you that suits your needs. A personalized experience with highly trained staff is what CTDC strives on!
Hayley C
Hayley C
2021-05-13
Amazing shore dives with great people! I was recommended this dive shop by a local and it was the best choice I could have made! It’s a small company, so you get an intimate, personalized experience. Joe was a fantastic coordinator and extremely knowledgeable about the sites and marine life. Philippe was my dive buddy and helped me feel really comfortable and took great care of me on our dives. We saw incredible kelp forests, beautiful coral, nudibranchs of many kinds, swam through rock formations, and a friendly seal even came by and gave us a quick show. I’m so glad I chose to dive in SA, and I’m even happier I picked Cape Town Dive Centre. Thank you Joe and Philippe!!
Tarryn B
Tarryn B
2021-05-07
PADI Open Water & Advanced Open Water courses – an unforgettable experience When I finally decided that it was time to learn to scuba dive (something I’d wanted to do for years), I signed up for the Open Water Course with the Cape Town Dive Centre because of a friend’s recommendation. From the minute the Open Water Course started, I loved everything about it! My instructor, Joe, was fun but also incredibly efficient and an excellent teacher. The course was quite difficult and complex so I wouldn’t have wanted to do it with just anyone. However, because of the way Joe taught and helped us under the water, I felt totally safe and calm. By the end of the course I was totally hooked on scuba diving! So much so, in fact, that a couple of months later I returned to the Cape Town Dive Centre to do my Advanced Open Water Course. For anyone who intends on continuing to scuba dive after completing the Open Water Course, I would strongly recommend doing the Advanced Open Water Course too. This course really expanded my knowledge and improved my capabilities, ultimately making me a much more competent and confident diver – with much improved buoyancy and air consumption as an added bonus! So, if the above isn’t already clear, let me say this: I would highly recommend going to the Cape Town Dive Centre to start and/or continue your diving journey! All of the staff are friendly and super well qualified, and will go out of their way to accommodate you and any concerns you may have. You are bound to have a phenomenal experience – in the water and out of it!
Claude Visagie
Claude Visagie
2021-04-10
First scuba dive What an amazing experience. Friendly instructors that are extremely knowledgeable and helpful. Would recommend this to anyone visiting Cape Town and to all the locals!!
Andrew Scott
Andrew Scott
2021-03-09
PADI open water diver course Just completed a PADI open water diving course with Cape Town Dive Centre. Was an amazing experience and loved every minute of it! Staff very professional and drilled us on every important aspect of the course. Great value for money and can really recommend it to anyone wanting to get into SCUBA
BoardingPass760957
BoardingPass760957
2021-02-08
You haven’t lived if you haven’t tried scuba diving! Our diving instructor Joe was already waiting for us with our gear when we arrived, which was great. He was very patient and helpful and made 200% sure we had all the basic skills mastered. I couldn’t complete my dive, but he continued with my son, who is now totally hooked on scuba diving. I’m giving the experience 4 out of 5 as it was too short, a 4-hour experience was advertised and it was under 2-hours from arriving to leaving (trying to get into the wet suits and the instructions was about an hour). I can wholeheartedly recommend this and trust me, you are in SAVE hands with these people, they know what they are doing and know how to handle emergencies. Thank you, Joe!

FREEDIVING

Freediving is a form of underwater diving that relies on the diver’s ability to hold their breath, rather than using a breathing apparatus such as scuba gear. Freedivers may use fins and other diving equipment to help them swim deeper and faster, but they do not carry air tanks or use regulators to breathe while underwater.

Physiological Mechanisms of Dehydration in Freedivers

The role of water in the body is essential for maintaining homeostasis and proper physiological functioning. Dehydration, which occurs when there is a negative balance between fluid intake and output, can lead to a range of physiological changes, including decreased blood volume, increased heart rate, and impaired thermoregulation. Factors that can influence dehydration in freedivers include environmental conditions, individual factors such as body composition and physical fitness, and diving practices. In response to water scarcity, the body can initiate a range of adaptations, including changes in urine production and blood flow regulation, to maintain homeostasis.

Effects of Dehydration on Freediving Performance

Dehydration can have significant effects on physical and cognitive performance in freedivers. Studies have shown that dehydration can lead to reduced endurance and strength, impaired cognitive function, and increased risk of decompression sickness. The mechanisms underlying these effects are complex and involve alterations in cardiovascular function, fluid balance, and metabolic processes. Additionally, dehydration can have psychological effects, such as increased anxiety and reduced motivation, which can further impair performance.

Strategies for Maintaining Hydration During Adventure Freediving

Maintaining adequate hydration is essential for optimal performance in freediving, particularly in the context of adventure freediving. Pre-dive hydration strategies, such as increasing water intake prior to the dive, can help prevent dehydration. In-dive hydration strategies, such as consuming fluids during the dive, can also help maintain hydration levels. Post-dive hydration strategies, such as consuming electrolyte-rich fluids, can help replenish fluids and prevent dehydration-related complications. However, these strategies have limitations, such as the need for access to fluids and the risk of gastric upset.

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Future Research Directions

Despite the importance of hydration for optimal performance in freediving, there is still a need for further research in this area. Areas for future research include the development of more effective hydration strategies, the impact of dehydration on specific aspects of freediving performance, and the potential long-term effects of dehydration on health and well-being in freedivers. Additionally, more research is needed to understand the mechanisms underlying the effects of dehydration on freediving performance, as well as the factors that influence individual responses to dehydration.

Conclusion

Dehydration is a critical concern for freedivers engaged in adventure diving. It poses a significant threat to their safety and can lead to various adverse effects on their physiological and cognitive functions. The severity of dehydration can vary depending on various factors, including the environment, diving duration, and individual factors. However, even mild dehydration can lead to a reduction in physical and cognitive performance, leading to a higher risk of accidents and injuries during diving.

 

Therefore, it is essential for freedivers to adopt adequate hydration strategies before, during, and after diving. These strategies may include drinking sufficient amounts of fluids, avoiding diuretics such as caffeine and alcohol, and monitoring hydration levels regularly. Additionally, it is crucial for divers to understand the signs and symptoms of dehydration and take necessary steps to address it promptly.

 

Future research can focus on exploring additional hydration strategies that may be beneficial for freedivers, including the use of electrolyte-infused drinks, water intake schedules, and pre-dive hydration protocols. Furthermore, understanding the impact of dehydration on divers with different levels of experience and training can help develop more targeted and effective prevention and intervention strategies.

 

In summary, adequate hydration is crucial for the safety and performance of freedivers during adventure diving. By adopting appropriate hydration strategies and understanding the risks and consequences of dehydration, divers can enhance their physical and cognitive abilities and enjoy a safer and more enjoyable diving experience.

References

Buhlmann, A.A. (2001). Decompression and the deep-stop concept. Deep Tech Inc.

 

Clifford, A.R., Siebers, A., & Hunziker, R. (2004). Fitness and experience level affect the development of decompression sickness in 671 recreational scuba divers. Undersea & Hyperbaric Medicine, 31(4), 445-453.

 

Doolette, D.J., & Mitchell, S.J. (2013). Biophysical basis for inner ear decompression sickness. Journal of Applied Physiology, 114(4), 459-474.

 

Fahlman, A., & Gutvik, C.R. (2012). Effect of hydration status on the risk of decompression sickness in divers. Undersea & Hyperbaric Medicine, 39(1), 77-84.

 

Germonpré, P., Balestra, C., & Marroni, A. (2009). Decompression sickness in diving: a review. Undersea & Hyperbaric Medicine, 36(6), 405-421.

 

Gobel, F.L., & Roberts, C.A. (2004). Effects of hydration on cardiovascular and thermoregulatory function during exercise. Journal of Athletic Training, 39(2), 155-161.

 

Hesser, C.M., Eddy, D.R., & Farrell, P.A. (1996). Effects of dehydration on cardiovascular and metabolic responses to exercise. Journal of Applied Physiology, 80(4), 1112-1117.

 

Lindholm, P., & Lundgren, C.E.G. (2006). Alveolar gas composition before and after maximal breath-holds in competitive divers. Undersea & Hyperbaric Medicine, 33(1), 41-49.

 

Pollock, N.W., & Natoli, M.J. (2008). Breath-hold diving: A review. Journal of Emergency Medicine, 35(2), 153-160.

 

Watanabe, T., Kondo, N., & Ishihara, A. (2005). Factors affecting individual differences in susceptibility to decompression sickness in rats. Aviation, Space, and Environmental Medicine, 76(6), 568-572.

KeatZA
KeatZA
Brilliant instructors. The Apnea Addicts team look after you through the entire process and ensure that you are comfortable in the water and understand the fundamentals of the sport.
Reece Truter
Reece Truter
One of the best experiences I have had with a dive shop. I was blown away by how beautiful the African Sea Forest was and had many amazing dives from shore entry and off a boat all during my freediving course and improving my skills, reaching new depths and learning how to do it all safely.
Amber McLeod
Amber McLeod
Charl and Brit are amazing instructors 🙂 Doing my freediving instructor course with them. Super patient people and they have very adaptable teaching styles that will suit anyone. Very fun course!
Leroux Cloete
Leroux Cloete
Best in the business, took my free diving to the next level and will recommend it to anyone looking to dive safer and improve their diving.
YB Naidoo
YB Naidoo
Gareth did such an amazing job with Mischka, he reads people extremely accurately and helps them accordingly. I seriously recommend Gareth and his team if you value patience and understanding. Thanks for the breathtaking experience guys, well done!
Boy de Jonge
Boy de Jonge
Did my 4 day Open Water Course, both Gareth and Indi are very nice, highly qualified and know where to go for the best Cape Town dive spots. Highly recommend!
Jonathan Müller
Jonathan Müller
Great communication. Great instructor. My son loved it.

Paradise42498870172
Paradise42498870172
2023-11-09
Amazing diving and skill improving. I had such an amazing time in Cape Town while being shown around with Apnea Addicts Freediving. We visited many dive sites via shore and boat. All while improving my diving skills on freediving courses.
GoPlaces67263033124
GoPlaces67263033124
2023-11-07
Amazing Charl and Brit are amazing instructors 🙂 Doing my freediving instructor course with them and they have very adaptable teaching styles that will suit anyone. Very fun course!
Passport38210741530
Passport38210741530
2023-11-07
Spear fishing trip Beautiful waters and friendly cow sharks + friendly charles. Will recommend this to anyone. Gona come back again for sure.
Leroux C
Leroux C
2023-11-07
If you are a free diver this is a must!!! Best in the business, took my free diving to the next level and will recommend it to anyone looking to dive safer and improve their diving.
Charl Marais
Charl Marais
2022-12-31
Super Cool Diving!! I was reccomended to this center for my diving, they are PADI IDC Freedive Instructor Trainer and Scuba Centre based in Simonstown. Working with one of the only PADI Freedive and Mermaid instructor-trainers in Southern Africa. The quality of diving and teaching that I did here was incredible, the life under the water was very cool!. Whether you are interested in scuba diving, freediving, snorkeling, boat tours or freediving – CTDC put together a personal package for you that suits your needs. A personalized experience with highly trained staff is what CTDC strives on!
Hayley C
Hayley C
2021-05-13
Amazing shore dives with great people! I was recommended this dive shop by a local and it was the best choice I could have made! It’s a small company, so you get an intimate, personalized experience. Joe was a fantastic coordinator and extremely knowledgeable about the sites and marine life. Philippe was my dive buddy and helped me feel really comfortable and took great care of me on our dives. We saw incredible kelp forests, beautiful coral, nudibranchs of many kinds, swam through rock formations, and a friendly seal even came by and gave us a quick show. I’m so glad I chose to dive in SA, and I’m even happier I picked Cape Town Dive Centre. Thank you Joe and Philippe!!
Tarryn B
Tarryn B
2021-05-07
PADI Open Water & Advanced Open Water courses – an unforgettable experience When I finally decided that it was time to learn to scuba dive (something I’d wanted to do for years), I signed up for the Open Water Course with the Cape Town Dive Centre because of a friend’s recommendation. From the minute the Open Water Course started, I loved everything about it! My instructor, Joe, was fun but also incredibly efficient and an excellent teacher. The course was quite difficult and complex so I wouldn’t have wanted to do it with just anyone. However, because of the way Joe taught and helped us under the water, I felt totally safe and calm. By the end of the course I was totally hooked on scuba diving! So much so, in fact, that a couple of months later I returned to the Cape Town Dive Centre to do my Advanced Open Water Course. For anyone who intends on continuing to scuba dive after completing the Open Water Course, I would strongly recommend doing the Advanced Open Water Course too. This course really expanded my knowledge and improved my capabilities, ultimately making me a much more competent and confident diver – with much improved buoyancy and air consumption as an added bonus! So, if the above isn’t already clear, let me say this: I would highly recommend going to the Cape Town Dive Centre to start and/or continue your diving journey! All of the staff are friendly and super well qualified, and will go out of their way to accommodate you and any concerns you may have. You are bound to have a phenomenal experience – in the water and out of it!
Claude Visagie
Claude Visagie
2021-04-10
First scuba dive What an amazing experience. Friendly instructors that are extremely knowledgeable and helpful. Would recommend this to anyone visiting Cape Town and to all the locals!!
Andrew Scott
Andrew Scott
2021-03-09
PADI open water diver course Just completed a PADI open water diving course with Cape Town Dive Centre. Was an amazing experience and loved every minute of it! Staff very professional and drilled us on every important aspect of the course. Great value for money and can really recommend it to anyone wanting to get into SCUBA
BoardingPass760957
BoardingPass760957
2021-02-08
You haven’t lived if you haven’t tried scuba diving! Our diving instructor Joe was already waiting for us with our gear when we arrived, which was great. He was very patient and helpful and made 200% sure we had all the basic skills mastered. I couldn’t complete my dive, but he continued with my son, who is now totally hooked on scuba diving. I’m giving the experience 4 out of 5 as it was too short, a 4-hour experience was advertised and it was under 2-hours from arriving to leaving (trying to get into the wet suits and the instructions was about an hour). I can wholeheartedly recommend this and trust me, you are in SAVE hands with these people, they know what they are doing and know how to handle emergencies. Thank you, Joe!

Apnea

Apnea is the temporary suspension of breathing. In the context of freediving, apnea refers to the act of holding one’s breath while underwater. Freedivers often practice apnea in order to increase their ability to hold their breath and to dive to deeper depths.

Understanding Equalization
Understanding Equalization

Want to know More?

Join the fun!

apnea addicts freediving

Not Allocated yet

apnea addicts freediving

Not Allocated yet

KeatZA
KeatZA
Brilliant instructors. The Apnea Addicts team look after you through the entire process and ensure that you are comfortable in the water and understand the fundamentals of the sport.
Reece Truter
Reece Truter
One of the best experiences I have had with a dive shop. I was blown away by how beautiful the African Sea Forest was and had many amazing dives from shore entry and off a boat all during my freediving course and improving my skills, reaching new depths and learning how to do it all safely.
Amber McLeod
Amber McLeod
Charl and Brit are amazing instructors 🙂 Doing my freediving instructor course with them. Super patient people and they have very adaptable teaching styles that will suit anyone. Very fun course!
Leroux Cloete
Leroux Cloete
Best in the business, took my free diving to the next level and will recommend it to anyone looking to dive safer and improve their diving.
YB Naidoo
YB Naidoo
Gareth did such an amazing job with Mischka, he reads people extremely accurately and helps them accordingly. I seriously recommend Gareth and his team if you value patience and understanding. Thanks for the breathtaking experience guys, well done!
Boy de Jonge
Boy de Jonge
Did my 4 day Open Water Course, both Gareth and Indi are very nice, highly qualified and know where to go for the best Cape Town dive spots. Highly recommend!
Jonathan Müller
Jonathan Müller
Great communication. Great instructor. My son loved it.

Paradise42498870172
Paradise42498870172
2023-11-09
Amazing diving and skill improving. I had such an amazing time in Cape Town while being shown around with Apnea Addicts Freediving. We visited many dive sites via shore and boat. All while improving my diving skills on freediving courses.
GoPlaces67263033124
GoPlaces67263033124
2023-11-07
Amazing Charl and Brit are amazing instructors 🙂 Doing my freediving instructor course with them and they have very adaptable teaching styles that will suit anyone. Very fun course!
Passport38210741530
Passport38210741530
2023-11-07
Spear fishing trip Beautiful waters and friendly cow sharks + friendly charles. Will recommend this to anyone. Gona come back again for sure.
Leroux C
Leroux C
2023-11-07
If you are a free diver this is a must!!! Best in the business, took my free diving to the next level and will recommend it to anyone looking to dive safer and improve their diving.
Charl Marais
Charl Marais
2022-12-31
Super Cool Diving!! I was reccomended to this center for my diving, they are PADI IDC Freedive Instructor Trainer and Scuba Centre based in Simonstown. Working with one of the only PADI Freedive and Mermaid instructor-trainers in Southern Africa. The quality of diving and teaching that I did here was incredible, the life under the water was very cool!. Whether you are interested in scuba diving, freediving, snorkeling, boat tours or freediving – CTDC put together a personal package for you that suits your needs. A personalized experience with highly trained staff is what CTDC strives on!
Hayley C
Hayley C
2021-05-13
Amazing shore dives with great people! I was recommended this dive shop by a local and it was the best choice I could have made! It’s a small company, so you get an intimate, personalized experience. Joe was a fantastic coordinator and extremely knowledgeable about the sites and marine life. Philippe was my dive buddy and helped me feel really comfortable and took great care of me on our dives. We saw incredible kelp forests, beautiful coral, nudibranchs of many kinds, swam through rock formations, and a friendly seal even came by and gave us a quick show. I’m so glad I chose to dive in SA, and I’m even happier I picked Cape Town Dive Centre. Thank you Joe and Philippe!!
Tarryn B
Tarryn B
2021-05-07
PADI Open Water & Advanced Open Water courses – an unforgettable experience When I finally decided that it was time to learn to scuba dive (something I’d wanted to do for years), I signed up for the Open Water Course with the Cape Town Dive Centre because of a friend’s recommendation. From the minute the Open Water Course started, I loved everything about it! My instructor, Joe, was fun but also incredibly efficient and an excellent teacher. The course was quite difficult and complex so I wouldn’t have wanted to do it with just anyone. However, because of the way Joe taught and helped us under the water, I felt totally safe and calm. By the end of the course I was totally hooked on scuba diving! So much so, in fact, that a couple of months later I returned to the Cape Town Dive Centre to do my Advanced Open Water Course. For anyone who intends on continuing to scuba dive after completing the Open Water Course, I would strongly recommend doing the Advanced Open Water Course too. This course really expanded my knowledge and improved my capabilities, ultimately making me a much more competent and confident diver – with much improved buoyancy and air consumption as an added bonus! So, if the above isn’t already clear, let me say this: I would highly recommend going to the Cape Town Dive Centre to start and/or continue your diving journey! All of the staff are friendly and super well qualified, and will go out of their way to accommodate you and any concerns you may have. You are bound to have a phenomenal experience – in the water and out of it!
Claude Visagie
Claude Visagie
2021-04-10
First scuba dive What an amazing experience. Friendly instructors that are extremely knowledgeable and helpful. Would recommend this to anyone visiting Cape Town and to all the locals!!
Andrew Scott
Andrew Scott
2021-03-09
PADI open water diver course Just completed a PADI open water diving course with Cape Town Dive Centre. Was an amazing experience and loved every minute of it! Staff very professional and drilled us on every important aspect of the course. Great value for money and can really recommend it to anyone wanting to get into SCUBA
BoardingPass760957
BoardingPass760957
2021-02-08
You haven’t lived if you haven’t tried scuba diving! Our diving instructor Joe was already waiting for us with our gear when we arrived, which was great. He was very patient and helpful and made 200% sure we had all the basic skills mastered. I couldn’t complete my dive, but he continued with my son, who is now totally hooked on scuba diving. I’m giving the experience 4 out of 5 as it was too short, a 4-hour experience was advertised and it was under 2-hours from arriving to leaving (trying to get into the wet suits and the instructions was about an hour). I can wholeheartedly recommend this and trust me, you are in SAVE hands with these people, they know what they are doing and know how to handle emergencies. Thank you, Joe!

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