Network Magazine Spring 2018 | Page 24

Optimal swim hand paddle is based upon a number of personal characteristics, including body size, swimming experience, proficiency and other anthropometric measurements Interestingly, the COT decreased as the paddle size increased. For example, COT decreased 0.86 J/kg/m when comparing swimming with the smallest size paddles to swimming with no paddles. COT remained essentially the same between the two largest sized paddles. With regard to stroke rate, it decreased when swimming with larger size paddles. The distance travelled per arm stroke increased with increasing paddle size, again with no difference between the largest 2 paddle sizes. With regard to caloric expenditure, it increased only a small amount (6.0%) with the largest paddle sizes. There was no difference in rating of perceived exertion (RPE) between any of the paddle sizes. The authors concluded that the largest of the swim hand paddles (391cm 2 ) significantly decreased COT, oxygen consumption (VO 2 ) and heart rate. The largest paddles also significantly increased the distance travelled per stroke. Given the vast amount of research conducted on swimming, it is difficult to believe a scarcity of research has been conducted on swimming hand paddles. Pros: Hand paddles are a common aid for conditioning in swimming training. This study, published in the Journal of Strength and Conditioning Research, contributes to improved understanding of swimming energetics as measured by the reduced metabolic cost of transport, cadence, VO 2 , heart rate and distance travelled per swimming stroke when using hand paddles. The research also implies that an optimal paddle size exists for making swimming more energy efficient, and this varies for different people. As swimming testing was conducted in a controlled environment at a set speed, it is logical that with this laboratory control removed, hand paddles should also allow swimming at faster speeds 24 | NETWORK SPRING 2018 than without them. This research has interesting applications for my own swimming with hand paddles. Swimming with hand paddles has seemed more difficult, therefore would imply a higher calorific expenditure (so not only would swim training improve my surf paddling but it would also be beneficial for weight management). Based on these research findings, however, I will be cautious that at times they allow me to propel myself further at a lower metabolic expenditure so may have the opposite effect. Therefore, I am not burning significantly more kcals per swim session. On the bright side, it’s still great swim training for surfing. Based on the findings in this study, if you are swimming with hand paddles for caloric expenditure you should be able to achieve that by swimming faster and for longer! Cons: Unfortunately, despite concluding that the largest of the swim hand paddles significantly decreased heart rate, the researchers chose not to list the heart rate findings for the swims with the different paddle sizes. Interestingly, a 2015 paper by Ruiz-Teba and colleagues from Spain reported very different findings with regards heart rate, i.e. they found a significant increase in heart rate in hand paddle-wearing swimmers doing the crawl stroke: heart rate was 131bpm without hand paddles and 148bpm with paddles. Despite the higher heart rate, the swimmers rating of perceived exertion decreased from 13.5 with no swim paddles to 11.8 with swim hand paddles. Dr Mike Climstein, PhD FASMF FACSM FAAESS AEP is one of Australia’s leading Accredited Exercise Physiologists. He is a faculty member in Clinical Exercise Physiology, Sport & Exercise Science at Southern Cross University (Gold Coast). [email protected] Joe Walsh, MSc is a sport and exercise scientist. As well as working for Charles Darwin and Bond Universities, he is a director of Fitness Clinic in Five Dock, Sydney. fitnessclinic.com.au