Entry #003: How to prepare for a cycling race, pre-race fueling timeline, 24 hours to the start

Hi Endurance Enthusiast,

Now that we have talked about the long-term aerobic development required to build your engine, we need to address the structural integrity of the chassis before you take it to the redline. Too often, I see athletes invest months in meticulous Zone 2 volume and threshold/Vo2 Max intervals, only to dismantle that physiological architecture in the final 24 hours through hydration errors, nutritional mismanagement, or psychological drift.

The reality is that your fitness is "banked" seven to ten days before the start gun. Nothing you do in the final 24 hours can increase your VO2max or functional threshold power. However, everything you do during this window determines whether you can access 100% of that fitness or if you will be capped at 85% by glycogen depletion and neuromuscular fatigue. We will strip away the "pasta party" mythology and replace it with a precise physiological protocol.

Executive Summary: The Brief

• Tapering is not Cessation: The goal is to shed fatigue while maintaining plasma volume and neuromuscular snap. Complete rest often leads to "staleness."
• Precision Glycogen Loading: For events >90 minutes, a target of 10-12g carbohydrate per kg of bodyweight in the 24-36 hours prior is required to saturate muscle glycogen.
• The Sodium Preload: Drinking water without electrolytes in the final hours risks hyponatremia. A hypertonic sodium solution (1,500mg/L) is superior for plasma volume expansion.
• Sleep Banking: One night of poor sleep before a race has negligible impact on physiological capacity if you have "banked" sleep in the preceding 72 hours.
• The "Opener" Session: A specific priming workout 24 hours pre-race upregulates metabolic enzymes without inducing structural damage.

The Science at a Glance

We often rely on intuition during race week, which typically leads to over-resting and under-fueling. Here is the physiological reality of the trade-offs: