Within the ultra-marathons, there is a difference between single stage races and multi-stage races, where the distance is split into daily stages.
Participation in ultra-marathon running is of increasing popularity where an ultra-marathon is a running race longer than the marathon distance of 42.195 km.
ConclusionsĪn increase in feet volume after a 100-km ultra-marathon was due to an increased fluid intake. The change in body mass was negatively related to both post-race plasma ( r = -0.28, p = 0.0129) and running speed ( r = -0.34, p = 0.0028). The change in the volume of the feet was negatively related to the change in plasma ( r = -0.26, p = 0.0227). Running speed was negatively related to both fluid intake ( r = -0.33, p = 0.0036) and the change in feet volume ( r = -0.23, p = 0.0236). Fluid intake was positively related to the change in the volume of the feet ( r = 0.54, p < 0.0001) and negatively to post-race plasma ( r = -0.28, p = 0.0142). Plasma volume and urine specific gravity increased ( p < 0.0001). Resultsīody mass decreased by 1.8 kg (2.4%) ( p 0.05). Fluid intake and the changes of volume of the feet were measured where the changes of volume of the feet were estimated using plethysmography.
In seventy-six 100-km ultra-marathoners, body mass, plasma, haematocrit and urine specific gravity were determined pre- and post-race.
The purpose of the present study was ( i) to investigate the association between fluid intake and a potential development of peripheral oedemas leading to an increase of the feet volume in 100-km ultra-marathoners and ( ii) to evaluate a possible association between the changes in plasma sodium concentration () and changes in feet volume. An association between fluid intake and changes in volumes of the upper and lower limb has been described in 100-km ultra-marathoners.
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