Measures of Fluid Loss during Surfing: A Preliminary Analysis in Recreational Surfers

Abstract

Surfing is a popular sport, but little is known about the extent to which recreational surfers experience fluid loss from this activity. The principal objective of this research was to estimate fluid loss during a surfing session through changes in pre-to post-session urine color (Ucol), urine osmolality (Uosm), and body mass (BM). Data were collected from 11 recreational surfers across 14 surf sessions conducted under various environmental (mean water temperature = 22.1 SD ± 2.3; range = 20-26 o C; air temperature range = 13.1-31.5 o C; relative humidity range = 37.5-88.1%) and surfing conditions (e.g. winter/summer, wave type, location, environmental and water conditions). Linear mixed effects models indicated that participants experienced significant pre-to post-session changes in BM (p < 0.001), but not in Ucol or Uosm. These findings suggested that recreational surfers may experience fluid loss (measured by pre-to post-surfing BM) that may impact on their performance and health, and therefore they should adopt a hydration strategy to minimize this impact.

The physiological and perceptual responses of stand‐up paddle board exercise in a laboratory‐ and field‐setting

“…As expected, EE increased linearly with SUP stroke rate (Table 2), however, with research seldom investigating similar responses to fixed-or self-paced SUP exercise (whether in laboratory-or field-settings), we are unable to directly compare our results with existing EE SUP data. Nonetheless, similar EEs have been reported for recreational surfing (∼7 to 8 kcal min −1 [Meir, Lowdon, Davie, Geebng, & Victoia, 1991;Watsford, Murphy, & Coutts, 2006]) and scootering (3.8-6.4 kcal min −1 [Kijima, Arimoto, & Muramatsu, 2007;Willmott & Maxwell, 2019]).…”

“…The authors acknowledge the difficulty when comparing HR data to other SUP or aquatic activities due to exercise intensity differences and lack of scientific research investigating the responses of recreational SUP users. Nonetheless, similar HR data were been reported while stationary on a surfboard (127 beats min −1 ), recreational surfing (135 beats min −1 ) and paddling on a surfboard (143 beats min −1 ), respectively (Meir et al, 1991). However, SUP allows for a more continuous and constant HR, as demonstrated during a marathon SUP competition (mean: 168 beats min −1 and peak: 187 beats min −1 ) (Schram et al, 2017b) compared to the intermittent nature of competitive surfing (mean: 139 beats min −1 , peak: 190 beats min −1 ) (Farley, Harris, & Kilding, 2012).…”

Possible Association of Energy Availability with Transferrin Saturation and Serum Iron during Summer Camp in Male Collegiate Rugby Players

“…Weight loss due to dehydration has been reported to occur prior to, during, and several days post-games [ 34 ]. The weight change has been proposed as an indicator of dehydration [ 35 ]. Therefore, as dehydration also affects, it is difficult to assess EA status during the rugby camp using weight change as an indicator.…”