Running
How to plan race week nutrition to ensure glycogen stores, hydration, and gut comfort are optimized for performance.
A practical, science-informed guide to shaping race week meals, fluids, and gut-friendly strategies that maximize energy availability, stable hydration, and minimal GI distress on race day.
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Published by Kenneth Turner
August 08, 2025 - 3 min Read
Preparing for race week begins with a clear, realistic plan that aligns training, rest, and nourishment. Start by mapping your typical daily intake and identify where adjustments can support glycogen storage without causing unnecessary fullness. Emphasize carbohydrate-rich meals at predictable times, distributing the load across breakfast, lunch, and dinner, while still honoring personal tolerance. Protein remains essential for muscle repair, but you’ll balance it with lean sources and moderate portions. Fat should be included but kept in check near workouts to avoid delays in gastric emptying. Hydration habits extend beyond water; include electrolytes to preserve balance, especially in warmer climates or high-sweat sessions.
Preparing for race week begins with a clear, realistic plan that aligns training, rest, and nourishment. Start by mapping your typical daily intake and identify where adjustments can support glycogen storage without causing unnecessary fullness. Emphasize carbohydrate-rich meals at predictable times, distributing the load across breakfast, lunch, and dinner, while still honoring personal tolerance. Protein remains essential for muscle repair, but you’ll balance it with lean sources and moderate portions. Fat should be included but kept in check near workouts to avoid delays in gastric emptying. Hydration habits extend beyond water; include electrolytes to preserve balance, especially in warmer climates or high-sweat sessions.
As race week unfolds, the focus shifts to refining fuel choices around key sessions and rest days. Practice your pre-run meal timing during workouts similar in distance to your target race; this reduces surprises late in the week. Carbohydrate choices should favor familiar, digested options to minimize GI upset—think seasoned grains, fruits, and low-fiber starches. Gut comfort improves with regular eating schedules and deliberate protein spacing, which can lessen cravings for poor choices under stress. You also want to avoid new foods or supplements that could trigger reactions. Hydration becomes a proactive task: sip consistently, monitor urine color, and adjust electrolyte intake to maintain smooth fluid balance.
As race week unfolds, the focus shifts to refining fuel choices around key sessions and rest days. Practice your pre-run meal timing during workouts similar in distance to your target race; this reduces surprises late in the week. Carbohydrate choices should favor familiar, digested options to minimize GI upset—think seasoned grains, fruits, and low-fiber starches. Gut comfort improves with regular eating schedules and deliberate protein spacing, which can lessen cravings for poor choices under stress. You also want to avoid new foods or supplements that could trigger reactions. Hydration becomes a proactive task: sip consistently, monitor urine color, and adjust electrolyte intake to maintain smooth fluid balance.
Tune hydration and electrolytes around heat and workouts
Glycogen supercompensation starts with consistent carbohydrate intake in the days leading to race week. This means not just the amount but also the timing of meals to ensure muscle and liver stores fill evenly. A typical plan redistributes carbs to breakfast and lunch while keeping dinner moderately filled, so you aren’t waking with empty stores. Include a small, easily digestible snack two hours before training to stabilize blood sugar and prevent energy dips. During longer sessions, use easily absorbed carbs such as gels or beverages with a familiar flavor. After workouts, prioritize a protein-and-carb recovery meal to support muscle repair and glycogen replenishment.
Glycogen supercompensation starts with consistent carbohydrate intake in the days leading to race week. This means not just the amount but also the timing of meals to ensure muscle and liver stores fill evenly. A typical plan redistributes carbs to breakfast and lunch while keeping dinner moderately filled, so you aren’t waking with empty stores. Include a small, easily digestible snack two hours before training to stabilize blood sugar and prevent energy dips. During longer sessions, use easily absorbed carbs such as gels or beverages with a familiar flavor. After workouts, prioritize a protein-and-carb recovery meal to support muscle repair and glycogen replenishment.
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Hydration strategies during race week require ongoing attention to both volume and electrolyte balance. Track baseline needs by weighing yourself before and after sessions to estimate fluid losses. Rehydrate with fluids that restore sodium, potassium, and chloride as you sweat. If the forecast predicts heat, increase electrolyte concentration modestly, but avoid overhydration, which can dilute sodium and impair performance. Thirst is a useful guide, but thirst alone isn’t reliable for adults in training. Small, regular sips throughout the day beat large, erratic intakes. Comfort drinks with familiar flavors reduce the likelihood of GI disturbance and encourage adherence.
Hydration strategies during race week require ongoing attention to both volume and electrolyte balance. Track baseline needs by weighing yourself before and after sessions to estimate fluid losses. Rehydrate with fluids that restore sodium, potassium, and chloride as you sweat. If the forecast predicts heat, increase electrolyte concentration modestly, but avoid overhydration, which can dilute sodium and impair performance. Thirst is a useful guide, but thirst alone isn’t reliable for adults in training. Small, regular sips throughout the day beat large, erratic intakes. Comfort drinks with familiar flavors reduce the likelihood of GI disturbance and encourage adherence.
Practice small, repeatable fueling rituals that feel easy
Gut comfort remains a cornerstone of race week for many athletes. Start by choosing foods you know sit well in your stomach and avoid high-fat, high-fiber, or unusually seasoned items close to workouts. A routine that minimizes experimental meals reduces the risk of bloating, cramps, or diarrhea during race day. Implement a refeeding window after intense training to prevent late-day GI distress. Keep a simple list of go-to foods and a few backup choices in case routine meals aren’t available. If you experience occasional discomfort, adjust meal size or timing rather than eliminating calories altogether.
Gut comfort remains a cornerstone of race week for many athletes. Start by choosing foods you know sit well in your stomach and avoid high-fat, high-fiber, or unusually seasoned items close to workouts. A routine that minimizes experimental meals reduces the risk of bloating, cramps, or diarrhea during race day. Implement a refeeding window after intense training to prevent late-day GI distress. Keep a simple list of go-to foods and a few backup choices in case routine meals aren’t available. If you experience occasional discomfort, adjust meal size or timing rather than eliminating calories altogether.
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In addition to macro-nutrient balance, consider micronutrients and gut-friendly practices. Adequate iron, calcium, and zinc support performance and recovery, so include sources appropriate to your dietary pattern. Probiotics or fermented foods may help some athletes, but listen to your gut and avoid drastic changes just before the event. Gentle, bile-friendly fats can be used to improve energy density without stressing digestion. A small amount of resistant starch or prebiotic fiber can feed beneficial microbes, but avoid overdoing fiber in the 24 hours prior to racing. Practice the exact timing you plan to use on race day during training.
In addition to macro-nutrient balance, consider micronutrients and gut-friendly practices. Adequate iron, calcium, and zinc support performance and recovery, so include sources appropriate to your dietary pattern. Probiotics or fermented foods may help some athletes, but listen to your gut and avoid drastic changes just before the event. Gentle, bile-friendly fats can be used to improve energy density without stressing digestion. A small amount of resistant starch or prebiotic fiber can feed beneficial microbes, but avoid overdoing fiber in the 24 hours prior to racing. Practice the exact timing you plan to use on race day during training.
Build a reliable fueling cadence that reduces fatigue
Carbohydrate timing becomes a precise routine when you’re chasing peak glycogen. On your hardest days, front-load a portion of daily carbs earlier in the day to fill stores, then taper slightly as training volume drops. On easy days, maintain steady carbohydrate intake to keep muscles primed without causing discomfort. For long sessions, practice using your preferred fueling method consistently—gel, chews, or drink mixes—and avoid introducing new products near race day. Monitor how the stomach tolerates these choices and adjust the texture and concentration if needed. Consistency here reduces anxiety and supports sustainable energy release.
Carbohydrate timing becomes a precise routine when you’re chasing peak glycogen. On your hardest days, front-load a portion of daily carbs earlier in the day to fill stores, then taper slightly as training volume drops. On easy days, maintain steady carbohydrate intake to keep muscles primed without causing discomfort. For long sessions, practice using your preferred fueling method consistently—gel, chews, or drink mixes—and avoid introducing new products near race day. Monitor how the stomach tolerates these choices and adjust the texture and concentration if needed. Consistency here reduces anxiety and supports sustainable energy release.
Alongside carbs, timing protein around workouts supports recovery without crowding digestion. A moderate portion after training helps with muscle repair while allowing room for fluids and carbs. Spread protein through the day with lean sources and dairy if tolerated, or plant-based equivalents in similar amounts. Research supports a modest protein ceiling for optimizing adaptation without hindering glycogen synthesis. If you train in the early morning, consider a light pre-breakfast option that won’t delay digestion, followed by a larger carb-containing meal after the session. Precision in timing compounds performance benefits.
Alongside carbs, timing protein around workouts supports recovery without crowding digestion. A moderate portion after training helps with muscle repair while allowing room for fluids and carbs. Spread protein through the day with lean sources and dairy if tolerated, or plant-based equivalents in similar amounts. Research supports a modest protein ceiling for optimizing adaptation without hindering glycogen synthesis. If you train in the early morning, consider a light pre-breakfast option that won’t delay digestion, followed by a larger carb-containing meal after the session. Precision in timing compounds performance benefits.
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Integrate a tested plan into race-day routines
Race-week sleep quality influences appetite hormones, gut motility, and overall energy. Aim for consistent bedtimes and wake times, even if training shifts demand. Create a wind-down routine that includes dim lighting, light stretching, and low-intensity activities to promote rest. When you do wake up early for runs, a small, familiar snack can top off energy reserves without triggering fullness. Throughout the day, maintain a steady routine of meals and beverages that mirrors your training days. Stress management—breathing, light movement, or meditation—complements nutrition by moderating cravings and digestion.
Race-week sleep quality influences appetite hormones, gut motility, and overall energy. Aim for consistent bedtimes and wake times, even if training shifts demand. Create a wind-down routine that includes dim lighting, light stretching, and low-intensity activities to promote rest. When you do wake up early for runs, a small, familiar snack can top off energy reserves without triggering fullness. Throughout the day, maintain a steady routine of meals and beverages that mirrors your training days. Stress management—breathing, light movement, or meditation—complements nutrition by moderating cravings and digestion.
Practical meal planning reduces last-minute stress. Prepare meals that can be easily scaled up or down to match daily energy needs, ensuring you always have a carbohydrate-rich base, a protein source, and a modest amount of fats. Use batch cooking to maintain consistency and minimize decision fatigue. Keep portable snacks available for busy days or travel, and choose options that your GI system tolerates well. A simple grocery list aligned with your race plan prevents impulse purchases that could derail your nutrition strategy. Rehearse your plan during training blocks so it becomes automatic.
Practical meal planning reduces last-minute stress. Prepare meals that can be easily scaled up or down to match daily energy needs, ensuring you always have a carbohydrate-rich base, a protein source, and a modest amount of fats. Use batch cooking to maintain consistency and minimize decision fatigue. Keep portable snacks available for busy days or travel, and choose options that your GI system tolerates well. A simple grocery list aligned with your race plan prevents impulse purchases that could derail your nutrition strategy. Rehearse your plan during training blocks so it becomes automatic.
On race morning, execute a well-practiced breakfast that aligns with your usual pre-race experiences. Choose easily digested foods in a familiar format and avoid trying anything new. Allow enough time for digestion to prevent discomfort during the initial miles. Hydration should be steady but not excessive, with electrolytes adjusted to the day’s heat and humidity. During the warm segments of a course, sip at consistent intervals and take a small amount of carbohydrate every 15–20 minutes if your plan supports it. After the gun, maintain the fueling cadence that has proven reliable in training.
On race morning, execute a well-practiced breakfast that aligns with your usual pre-race experiences. Choose easily digested foods in a familiar format and avoid trying anything new. Allow enough time for digestion to prevent discomfort during the initial miles. Hydration should be steady but not excessive, with electrolytes adjusted to the day’s heat and humidity. During the warm segments of a course, sip at consistent intervals and take a small amount of carbohydrate every 15–20 minutes if your plan supports it. After the gun, maintain the fueling cadence that has proven reliable in training.
Post-race recovery continues the theme of balance and personalization. Replenish glycogen with carbohydrate-rich foods, while providing protein to support muscle repair. Rehydrate to replace fluid losses and restore electrolyte levels, particularly after long or hot races. Even when fatigue is high, choose simple meals that you know your gut tolerates well. If appetite is suppressed immediately after finishing, aim for small, frequent snacks rather than lifting a large meal all at once. Reflect on what worked and what didn’t, and adjust the plan for future competitions.
Post-race recovery continues the theme of balance and personalization. Replenish glycogen with carbohydrate-rich foods, while providing protein to support muscle repair. Rehydrate to replace fluid losses and restore electrolyte levels, particularly after long or hot races. Even when fatigue is high, choose simple meals that you know your gut tolerates well. If appetite is suppressed immediately after finishing, aim for small, frequent snacks rather than lifting a large meal all at once. Reflect on what worked and what didn’t, and adjust the plan for future competitions.
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