Amsterdam Marathon

Louise planned to replicate the successful fueling approach she used at the 2024 Frankfurt marathon. Her strategy centred around consuming ~250ml of Carb & Electrolyte Drink Mix from bottles positioned at the elite aid stations every 5km. In preparation, she had pre-filled each bottle with ~350ml of drink mix, knowing from race simulations that she typically consumed ~250ml while running. In addition, she attached a PF 30 Gel to every second bottle with an elastic band, and From 30km onwards, she planned to switch to cola in her bottles. Together, this would allow Louise to meet her target carb intake of ~90g/h. In the lead up to the race, she practiced drinking from her marathon bottles during race-specific sessions to refine her intake and ensure the strategy was realistic and repeatable under race conditions.

On race day, Louise arrived at the first elite aid station to find that her designated bottle was missing. Thankfully, she was carrying an additional PF 30 Gel, which she took along with a small amount of a carb drink provided by another athlete. Because of this, she skipped her planned gel at 10km, but resumed her schedule at 20km. At 30km she experienced some nausea so once again didn’t use her planned gel, and relied on cola to see her across the finish line. Despite these mid-race adjustments and missing bottles, Louise executed her plan well and maintained adequate carb intake, whilst also running a new personal best - a great example of being able to execute a race plan even when things don’t go perfectly from a nutrition perspective.

Louise’s hydration plan centred entirely around consuming Carb & Electrolyte Drink Mix at regular intervals throughout the race. Together with the cola that she incorporated into her strategy in the final ~12km, this meant that the relative sodium concentration of her intake closely matched the sodium concentration of her sweat. Louise sometimes chooses to pick up some additional water at aid stations, but given the relatively cool conditions in Amsterdam she didn’t feel the need to. Interestingly, we are observing more and more endurance athletes using sodium bicarbonate prior to racing, and Louise has recently incorporated this into her pre-race strategy, believing it to provide some additional performance benefits. Given the high quantity of sodium in sodium bicarbonate (~270mg sodium per gram of sodium bicarb), this will also have ensured she started the race well hydrated due to the effects of sodium on fluid retention. Importantly, Louise has practiced using sodium bicarb and prefers to use this alongside her usual pre-loading strategy using PH 1500.