At XACT, we love designing products that meet the real-world needs of athletes out on the trail. But to make sure our vision aligns 100% with the latest nutritional science, we sat down with the sports nutritionist dietitians at TeamNutrition.
On the agenda: busting protein myths, understanding the famous "30-minute anabolic window," and finding out how endurance athletes can truly optimize their recovery.
Here is what came out of our discussion.
1. The Big Misconception: Endurance vs. Strength Training
Everywhere you look, recovery products are shouting “20g or 30g of protein!”. Yet, for our endurance athletes, we chose to put carbs first. Are we off track?
When it comes to sports recovery, your primary need depends on the type of effort you just put in.
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In strength training, the focus is usually on muscle repair and adaptation, which explains the heavy emphasis on protein.
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In endurance sports (running, cycling, cross-country skiing, triathlon), the needs are different. After a long, intense effort, or one that’s closely followed by another session, one of the main goals is to replenish glycogen stores—the carbohydrates stored in your muscles and used as energy during exercise.
"Protein is still useful, but a high-protein, low-carb product doesn't always meet the primary needs of an endurance athlete after a long or intense workout. In practice, a ratio of around 3:1 or 4:1 (carbs to protein) is a good rule of thumb for endurance recovery. However, actual needs vary based on duration, intensity, the athlete’s weight, fueling during the workout, and the time before the next session," explains sports dietitian Chloé Fleurent-Grégoire of TeamNutrition, who is an endurance athlete herself.
How we apply these principles at XACT
Based on these facts, the product development team at XACT Nutrition designed our recovery formula with carbohydrates at the forefront. The goal is to offer a convenient option tailored to the typical recovery needs of an endurance workout. Our Immediate Recovery formula provides an approximate 3:1 ratio, with 43g of carbs to 14g of protein per serving.
2. Fact vs. Fiction: The "30-Minute Window"
We often hear that if you don't eat within 30 minutes of finishing a workout, your recovery is ruined. Is this a myth, or is there some context missing?
Your muscles aren't going to self-destruct at minute 31! Physiologically speaking, the window does exist: right after exercise, your muscles act like a sponge, absorbing glucose more quickly to rebuild glycogen stores. This timing becomes particularly crucial in two scenarios:
Scenario A: Two-a-days or back-to-back workouts
If you run in the morning and ride in the late afternoon, or if you are competing over multiple consecutive days, your body has less than 8 to 12 hours to recover. Timing becomes critical to optimize glycogen reloading.
"Maximizing those first 30 minutes is your best shortcut to reducing the risk of bonking during your second workout," Chloé adds.
Scenario B: Intense workouts or sessions lasting over 90 minutes
After a long effort, your glycogen stores are running on empty. The 30 minutes post-workout is when your muscles are primed to absorb fuel, kickstarting the rebuilding process immediately and helping you avoid residual fatigue the next day.
How we apply these principles at XACT
Our powder formula was designed specifically for these two realities, while simplifying your logistics out in the field (traveling, trail race finishes). It offers a quick, accessible, and well-thought-out solution. Plus, for athletes who struggle to tolerate solid food after a grueling effort, our formula is ideal.
3. What goes into our post-race shaker?
We designed our Immediate Recovery formula using a milk powder base that is rich in carbohydrates and contains electrolytes. Is this the right fit for endurance athletes?
From a nutritional standpoint, classic chocolate milk is an excellent recovery fuel because it combines carbs (energy) and protein (muscle repair) in a 3:1 ratio, and its liquid form aids in rehydration.
However, carrying fresh milk in your gear bag during a 4-hour ride isn't exactly ideal. Additionally, during prolonged efforts or in hot weather, mineral loss through sweat (especially sodium) needs to be taken into account, though exact needs remain highly individual.
Electrolytes, particularly sodium, can be beneficial after long efforts, in hot temperatures, or for heavy sweaters. However, exact requirements vary greatly from one athlete to another.
How we apply these principles at XACT
We chose milk powder to provide enough protein for muscle recovery, with added carbohydrates to replenish glycogen stores. The formula, which also contains sodium and potassium, can be mixed with the liquid of your choice to support rehydration after efforts where sweat losses might be higher.
In summary: When is it important to replenish your glycogen stores?
As soon as your workout goes over 90 minutes, the intensity ramps up, or you have back-to-back training sessions, recovery should no longer be left to chance. Taking advantage of the famous 30-minute window with an optimal 3:1 ratio (carbs to protein), context-appropriate electrolytes, and proper hydration is your best strategy for peak recovery.
Needs can vary considerably from person to person. A nutritionist can help adjust the quantity and quality of your intake based on the athlete, their sport, schedule, digestive tolerance, and goals.