We all know that eating fruit and vegetables is good for us, but now there’s a growing body of scientific evidence that shows that drinking the juice from beetroot for freediving will give you the competitive edge and allow you to go for longer on just one breath.
Two recent scientific studies using freedivers practicing static and dynamic apnea have shown that drinking specially prepared beetroot juice gave them the competitive edge as opposed to drinking a placebo.
Why use beetroot for freediving?
It’s not as simple as just starting to incorporate beetroot into your daily diet. You can’t eat a beetroot salad and then expect to smash your personal best. The key is in the nitrates that are found in beetroot. Nitrates in the beetroot juice interact with enzymes in saliva to generate nitric oxide (NO) in the blood system. NO is a vasodilator (widening of blood vessels) that can increase the flow of blood and oxygen to the muscles, thereby boosting strength and endurance.
Nitric oxide also reduces lactic acid build up which is perfect for freedivers, as this is what causes such a burn at the end of a long dive or swim.
However, it’s a lot of nitrates you’d need to consume (around 400mg), and so to save you having to juice and consume litres of beetroot juice, a company called Beet It have come up with small ‘shots’ of concentrated juice designed to quickly give the body enough beetroot for freediving to make a difference to your performance.
So where’s the science?
The company who makes Beet It Sport shots are so sure of their product that they even manufacture shots that look and taste identical to the real thing but which have had the nitrates removed.
This enables double blind studies to be carried out, whereby the testers and the participants don’t know who is getting the nitrate rich shots and who is getting the placebo.
There have been numerous studies into the effect of the shots on athletes across many disciplines, but there have been two studies into using beetroot for freediving, in static and then dynamic apnea.
2012 study into using beetroot for freediving
The first study is entitled:
“Acute dietary nitrate supplementation improves dry static apnea performance”
Respiratory Physiology & Neurobiology (May 2012)
Department of Engineering & Sustainable Development, Mid-Sweden University, Osterund – Harald K Engana, Prof Andrew M Jones, Fanny Ehrenberg, Erika Schagatay
The study showed that freedivers had an 11% increase in their static apnea times after taking the beetroot shots:
After acute dietary NO3 supplementation in trained apneic divers, we found an 11% increase in maximal apneic duration compared to placebo. Sub-maximal apneas of the same duration as in placebo trials resulted in less arterial desaturation after NO3 rich BR ingestion, suggesting reduced O2 consumption being the likely 412 cause of the prolonged maximal apneas. The unaffected diving bradycardia during sub-maximal apneas indicates that NO3 supplementation does not affect the cardiovascular diving response. We conclude that dietary NO3 supplementation might be a means to enhance apneic performance by reducing metabolic costs for apnea athletes.
The results suggest that acute dietary NO3 supplementation may increase apneic duration by reducing metabolic costs.
2016 study into using beetroot for freediving
The second study (by one of the same authors as the earlier one) looked at the effect on beetroot for freediving during dynamic apnea:
“Dietary nitrate enhances arterial oxygen saturation after dynamic apnea”
Scandinavian Journal of Medicine and Science in Sports (March 2016)
Mid Sweden University – A. Patrician and E. Schagatay
The freedivers all performed dynamic apnea swims of 75m and had their oxygen saturation measured before and after each dive. The freedivers that had used the nitrate rich Beet It Sport shots, had more oxygen saturation at the end of the dives as opposed to the divers who used the placebo:
Breath-hold divers train to minimize their oxygen consumption to improve their apneic performance. Dietary nitrate has been shown to reduce the oxygen cost in a variety of situations, and our aim was to study its effect on arterial oxygen saturation (SaO2) after dynamic apnea (DYN) performance. Fourteen healthy male apnea divers (aged 33 ± 11 years) received either 70 mL of concentrated nitrate-rich beetroot juice (BR) or placebo (PL) on different days. At 2.5 h after ingesting the juice, they were asked to perform 2 × 75 m DYN dives in a pool with 4.5-min recovery between dives. Each dive started after 2-min countdown and without any warm-up apneas, hyperventilation, or lung packing. SaO2and heart rate were measured via pulse oximetry for 90 s before and after each dive. Mean SaO2 nadir values after the dives were 83.4 ± 10.8% with BR and 78.3 ± 11.0% with PL (P < 0.05). At 20-s post-dive, mean SaO2 was 86.3 ± 10.6% with BR and 79.4 ± 10.2% with PL (P < 0.05).
In conclusion, BR juice was found to elevate SaO2 after 75-m DYN. These results suggest an oxygen conserving effect of dietary nitrate supplementation, which likely has a positive effect on maximal apnea performance.
Read more about the study by clicking here
And see a collection of all the latest research into Beet It Sport shots by clicking here
What do Beet It Sport shots taste like?
Let’s just say they are an acquired taste! They are very strongly flavoured and quite viscous, and certainly taste of beetroot. You can either just drink the shot in a couple of gulps, or you can mix it with other drinks or smoothies to try and disguise the taste.
Beet it also sell an oat based bar, each containing 400mg of dietary nitrate, and these can be more palatable for freedivers, especially if they’re after a bit of easily digested energy before a dive.
Beetroot for freediving champions?
Go Freediving is sponsoring one of our own, Carl Atkinson as he prepares to represent his country at the Freediving World Championships this September. We’ve given him four cases of shots to see how they affect his training and eagerly await his feedback.