Associations of power at VO2peak and anaerobic threshold with rank in British high performance junior surfers

Purpose. The objective of this study was to determine the relationships of peak oxygen uptake ( VÌO<inf>2peak</inf>), power at VÌO<inf>2peak</inf> and power at the anaerobic threshold (AT) with national ranking in a sample of British high performance junior surfers. Methods. Eighteen male surfers (aged 15.4 ± 1.4 years) from the British Junior Surfing team were tested for VÌO<inf>2peak</inf> and AT using an adapted kayak ergometer; national ranking was used to indicate performance level. The AT was identified as the point at which VÌE/VÌO<inf>2</inf> started to rise without a concomitant increase in VÌE/VÌCO<inf>2</inf>. Spearman's rank (r<inf>s</inf>) and partial correlations (r<inf>p</inf>) controlling for age were used to identify the relationships between the physiological variables and national ranking. Results. Mean VÌO<inf>2peak</inf> was 3.1 ± 0.5 l · min^-1 (47.7 ± 7.2 ml · kg^-1 · min^-1) and mean AT occurred at 48.1 ± 12.2 W. There were significant correlations between national ranking and power at VÌO<inf>2peak</inf> (r<inf>s</inf> =-0.549, p = 0.028), power at AT (r<inf>s</inf> =-0.646, p = 0.009), and age (r<inf>s</inf> =-0.579, p = 0.012). Significant partial correlations were established controlling for age between national ranking and power at VÌO<inf>2peak</inf> (r<inf>p</inf> =-0.839, p = 0.000) and power at AT (r<inf>p</inf> =-0.541, p < 0.046). Conclusions. The power outputs associated with VÌO<inf>2peak</inf> and AT were significantly related to surfer ranking in this sample. However, due to the low coefficient of determination associated with the AT/ranking relationship, AT does not discriminate well between the ranking of surfers. These findings support the inclusion of power at VÌO<inf>2peak</inf> in assessment batteries for junior competitive surfers.