What is the Best Energy Bar for High School Athletes – Why and When?

Walk into any grocery store or convenience shop and a person can find an entire aisle dedicated to protein bars, energy bars, granola bars, trail mix bars or something similar that are marketed to people with active lifestyles. For high school athletic directors, coaches and athletic trainers working to support student-athlete performance, this can create confusion: Which bar is best—and when should their athletes eat it?

The reality is that not all bars are created equal, and timing matters just as much as ingredients. When used strategically, bars can be a convenient, cost-effective way to help student-athletes fuel properly throughout the school day, practice and recovery. When used incorrectly, they can fall short on performance needs.

Below is a practical guide to help schools, coaches and athletes understand “what bar and when.”

Midday Snacks: Balanced Energy Bars or Trail Mix Bars
For student-athletes navigating a full academic schedule, midday fueling is critical. Many athletes go from lunch to practice with little to no nutrition in between, which can lead to low energy, decreased focus and poor performance later in the day.

What to look for:

• Carbohydrates (primary energy source)

• Moderate protein (to support satiety, balanced energy and muscle maintenance)

• Healthy fats (for sustained energy)

Balanced energy bars (carbohydrate + protein) or trail mix bars that include ingredients like nuts, seeds, oats and dried fruit are ideal during this time.

Why it Works:
Carbohydrates help maintain blood sugar levels and mental focus during the school day. Adding protein and fat slows digestion, providing a steady release of energy that can carry athletes into afternoon practice without a crash. Trail mix-style bars are especially effective because they naturally combine these macronutrients.

For schools, encouraging or providing access to these types of bars in athletic training rooms, cafeterias or vending options can help bridge the gap between lunch and practice.

Pre-Workout: Higher-Carbohydrate Granola or Energy Bars
The goal before practice or competition is simple: provide the body with quick, accessible energy.

What to look for:

• Higher carbohydrate content

• Lower fat and fiber (to reduce gastrointestinal discomfort)

• Small amount of protein is fine, but not the focus

Granola bars or higher-carbohydrate energy bars are excellent pre-workout options, especially when eaten 30–60 minutes before activity.

Why it Works:
Carbohydrates are the body’s preferred fuel source during exercise, particularly for high-intensity sports. A bar rich in carbohydrates helps top off glycogen (carbohydrate) stores and provides readily available energy without sitting heavy in the stomach.

For athletes with limited time between school dismissal and practice, a simple granola bar can be the difference between starting practice fueled or running on empty.

During Workouts: Easy-to-Digest Granola Bars
For longer practices (90 minutes or more), tournaments or multiple-game days, athletes may need fuel during activity.

What to look for:

• Easily digestible carbohydrates

• Low fat and low fiber

• Simple ingredients

Soft granola bars or lower-fiber options are best during activity.

Why it Works:
During exercise, blood flow is directed toward working muscles, not digestion. Foods that are high in fat or fiber can cause discomfort or slow digestion. A simple, easy-to-chew granola bar provides quick carbohydrates that can help maintain energy levels, delay fatigue and support performance throughout extended activity.

Coaches can build this into practice by allowing quick “fuel breaks” during long sessions, especially in-season or during high-heat conditions.

Post-Workout: Higher-Protein Energy or Protein Bars
Recovery is where performance gains are solidified. After exercise, the body needs nutrients to repair muscle, replenish energy stores and prepare for the next session.

What to look for:

• Combination of carbohydrates and protein

• Goal of 15-25 grams protein for muscle recovery

• Low fiber

Higher-protein energy bars or protein bars can be effective post-workout options when whole foods are not immediately available.

Why it Works:
Carbohydrates help replenish glycogen stores that were depleted during exercise, while protein provides the amino acids needed for muscle repair and growth. A ratio of approximately 2:1 carbohydrates to protein (example: 40 grams carbohydrate and 20 grams protein) supports both recovery processes efficiently, especially for youth athletes with high training demands.

Providing post-practice bars in locker rooms, training facilities or team settings can help ensure athletes begin the recovery process immediately – particularly important for those with limited access to meals after school.

Why This Matters for High School Athletes
High school athletes are in a unique stage of development— they are growing, learning and training, often all at once. Proper fueling is essential not only for performance, but also for overall health, injury prevention and long-term development.

Research continues to highlight that adolescent athletes often under-fuel, particularly during the school day, which can negatively impact performance, recovery and even growth. A 2021 review published in Nutrients emphasized that youth athletes frequently fail to meet energy and macronutrient needs, especially carbohydrates, which are critical for performance and recovery.

Convenient options like bars can play a key role in closing this gap when implemented strategically.

Practical Takeaways for Schools and Coaches

• Stock smart options: Offer a variety of bars that fit different fueling needs (balanced, high-carbohydrate and higher- protein options).

• Educate athletes: Teach student-athletes when and why to choose specific types of bars.

• Build routines: Encourage consistent fueling habits before, during, and after practice.

• Think accessibility: Not all athletes have access to food between school and practice – bars can be an easy, portable solution.

Bars are not a one-size-fits-all solution – but they can be a powerful tool when used with purpose. By understanding “what bar and when,” schools and coaches can help student-athletes fuel smarter, perform better and recover stronger.

In the fast-paced environment of high school athletics, sometimes the simplest solutions – like the right bar at the right time – can make a meaningful impact.

Reference:
Desbrow, B., McCormack, J., Burke, L. M., et al. (2021). Sports Dietitians Australia Position Statement: Sports Nutrition for the Adolescent Athlete. Nutrients, 13(11), 4022.

Amy Goodson, MS, RD, CSSD, LD is a registered dietitian and consultant in the Dallas-Fort Worth area with an emphasis in overall health, wellness and sports nutrition. She is a speaker, spokesperson and writer, and she is passionate about communicating positive nutrition messages to consumers. Goodson has more than 19 years of experience as a sports dietitian and has worked with Ben Hogan Sports Medicine, Texas Christian University Athletics, the Dallas Cowboys, Texas Rangers and their minor league affiliates, FC Dallas Soccer, the NBA G League, the Alliance of American Football League, many PGA Tour players, as well as with many middle school, high school and endurance athletes.