The night before a race matters but the real sleep advantage starts days before.
Sleep is one of the most powerful performance tools athletes have. It supports muscle recovery, immune function, cognitive performance, and emotional regulation. Yet competition stress, travel, and schedule changes often disrupt sleep right when it matters most.
Research increasingly shows that combining strong sleep hygiene with targeted nutrition strategies can improve sleep quality and recovery before competition.
A recent narrative review in Nutrition Reviews examined dietary strategies that promote restful sleep and identified several nutrients and compounds with potential benefits, including melatonin, magnesium, omega-3 fatty acids, tart cherry juice, kiwifruit, L-theanine, glycine, and others (Conti, 2025).
Among these, melatonin has the strongest evidence. Melatonin is not simply a sedative. It acts as a timing cue for your body clock, helping the brain recognize “biological night” and align circadian rhythms. Because of this mechanism, the benefits are not always immediate. Physiological monitoring data show the clearest recovery improvements often appear after 3–5 days of consistent use, with users experiencing lower overnight heart rate and higher heart rate variability (HRV) – two key indicators of improved recovery and readiness.
Beyond melatonin, several foods may also support sleep quality:
• Tart cherry juice may improve sleep duration and recovery
• Kiwifruit, eaten about an hour before bed, may improve sleep onset and efficiency
• Magnesium may support nervous system relaxation and help reduce the time it takes to fall asleep
Best practices for optimizing sleep before race day:
• Begin adjusting sleep timing 3–5 days before competition
• Consider melatonin during this window if circadian adjustment is needed
• Maintain consistent sleep and wake times
• Reduce bright light and screens before bed
• Create a cool, dark, quiet sleep environment
• Consider evening nutrition strategies like tart cherry juice, kiwifruit, or magnesium
Athletes often focus heavily on training and fueling but underestimate the role of sleep in performance. Treat sleep like part of your training plan. Remember, a well-rested athlete = calm mind, recovered body, race readiness.
Keep Reading
- Triathlon Racing in the Heat: How to Adjust Pace, Power, Heart Rate, and Hydration
- Mastering Hot-Weather Racing: Stress Capacity, Smart Adjustments, and Global Fitness
- Mastering Race Day: Strategy, Planning, and Execution for Triathletes
About the Author
Elizabeth Waterstraat | Founder and Head Coach, Multisport Mastery
Elizabeth Waterstraat is the founder and head coach of Multisport Mastery, with 20 years of coaching experience and 26 years as an endurance athlete. A USA Triathlon Level III Coach, she is a five-time Kona qualifier, five-time Ironman World Championship finisher and 12-time National Champion. She has coached athletes from beginners to professionals and from first-time finishers to world champions, helping them develop the fitness, skills, and confidence to pursue ambitious goals through consistent, purposeful training.
Her coaching philosophy is built on communication, education, and partnership, with an athlete-driven approach that emphasizes the process as much as the outcome. She believes effective coaching requires understanding the individual, maintaining focus on meaningful goals, and finding balance between athletic ambition and the demands of everyday life. Through her coaching and writing, Elizabeth encourages athletes to take ownership of their development, build confidence through knowledge, and create a positive, sustainable relationship with sport.
Read more about Elizabeth, or book a fit call to talk about your goals.
