James Norbury
Ultra Trail Cape Town TM35 by UTMB
James' headline numbers
James' strategy
Fueling
Carbohydrate is the main fuel you burn when racing. Failing to fuel properly is a leading cause of underperformance in longer races.
James headed to South Africa for this race fresh off the back of completing his 30 peaks challenge here in the UK, where he set a new record for the fastest cumulative time. His nutrition plan for this race was completely ‘decoupled’, keeping his three levers (carbs, fluid and sodium) separate. He set a timer on his watch to remind him every 40 minutes to either take a sip of PF 90 Gel or have a PF 30 Chew. He targeted ~50g per hour, which for someone relatively new to taking on carbs during races, would help him avoid potential GI distress. This strategy worked perfectly for him, as he mentioned passing several athletes in the second half and had sky-high energy levels right until the end. It’s important to balance the potential performance benefits associated with high-carb intakes, with the risk of GI upset from taking too much through trial and error in training. James has already made plans to train his gut in long, high-intensity runs to tolerate closer to the recommended 90g/h.
Hydration
Taking on board an appropriate amount of fluid and sodium is essential to maintaining blood volume and supporting the cardiovascular effort needed to perform on race day.
Whilst the absolute amount of sodium and fluid consumed per hour is important, it’s critical to consider these in relation to each other. This is known as 'relative sodium concentration' and it’s expressed in milligrams per litre (mg/L). How much sodium you’re taking in per litre of fluid is more important than the absolute amount taken in per hour.
Sweat sodium concentration (mg/L) is largely genetically determined and remains relatively stable. Knowing how salty your sweat is enables you to replace a good proportion of your sweat losses, which can range from 200-2,000mg/L.
Whilst James’s losses are on the low side, getting his hydration strategy right is still crucial when it’s hot and/or humid as his higher sweat rate in these conditions can result in significant net losses over the duration of a race.
Learn moreAs temperatures hit 28℃ (82℉) up some of the climbs, James thanked himself for his aforementioned ‘decoupled’ strategy, as he drank more than he initially planned. Having done a practice run on the route to familiarise himself with what was to come, James had experienced some pretty severe muscle cramps and knew his hydration strategy wasn’t quite up to scratch. He found some streams to fill up his Soft Flasks with water and consumed Electrolyte Capsules to balance his relative sodium concentration even when drinking higher volumes of water. As a result, he avoided cramps during the race and rated his strategy a perfect 10/10.
How James hit his numbers
Here's everything that James ate and drank on the day...
James' weapons of choice
Final thoughts
James' full stats
Data Confidence?
There is an adequate level of accuracy in the data collected and the numbers reported. The athlete manages to recall what they ate and drank including most specifics (brands flavours quantities plausible estimations of volumes). However there are estimations made within the data which affect the overall confidence level in the data reported.