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CARBOHYDRATES FOR YOUTH ATHLETES

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Why Carbohydrates Matter for Youth Athletes

 

Carbohydrates (CHO) are the primary fuel source for:

  • the developing brain

  • working muscles

  • high‑intensity training

  • cognitive function

  • recovery

  • growth and maturation.

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Youth athletes rely heavily on carbohydrate availability because:

  • they have higher relative energy demands

  • they deplete glycogen faster than adults

  • they have limited glycogen storage capacity

  • their brains require a continuous supply of glucose

  • their training often includes repeated high‑intensity bursts.

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Inadequate carbohydrate intake is associated with:

  • early fatigue

  • reduced training quality

  • impaired cognitive performance

  • increased injury risk

  • energy imbalance

  • higher susceptibility to disordered eating patterns (Amawi, 2024a; Capra, 2024; Desbrow, 2021; Everett, 2025; Hecht, 2024).

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Youth‑Specific Physiology and Carbohydrate Use

 

Youth athletes differ from adults in several metabolic ways:

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Faster Glycogen Depletion

Young athletes deplete muscle glycogen more rapidly during exercise. This increases the importance of regular carbohydrate intake before and after training.

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Higher Brain Glucose Needs

The developing brain uses a significant portion of daily glucose. Low carbohydrate intake can impair focus, reaction time, decision‑making, learning, and emotional regulation.

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Limited Glycogen Storage Capacity

Younger athletes store less glycogen in skeletal muscle and liver. They require more frequent carbohydrate intake to maintain performance and recovery.

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High Training Frequency = High CHO Turnover

Many youth athletes train daily, multiple times per day, or across multiple sports. This increases carbohydrate turnover and raises daily requirements (Amawi, 2024a; Capra, 2024; Desbrow, 2021; Everett, 2025; Hecht, 2024).

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Daily Carbohydrate Requirements for Youth Athletes

 

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Carbohydrate needs vary based on:

  • age

  • growth stage

  • training intensity

  • training duration

  • sport type

  • total energy expenditure.

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General Daily Intake Range

 

  • 3–5 g/kg/day → light training

  • 5–7 g/kg/day → moderate training

  • 6–10 g/kg/day → high‑intensity or long‑duration training

  • 8–12 g/kg/day → tournament or multi‑session days.

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Minimum Brain Requirement

 

The RDA for carbohydrate in youth is 130 g/day, based on minimum glucose needs for brain function. This is a baseline, not an athletic target.

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Carbohydrate as % of Total Energy

 

Evidence suggests 45–65% of total daily energy should come from carbohydrates (Amawi, 2024a; Capra, 2024; Desbrow, 2021; Everett, 2025; Hecht, 2023).

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Timing Strategies for Carbohydrates

 

Carbohydrate timing supports performance, recovery, cognitive function, and training quality.

 
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Pre‑Training (1–4 hours before)

 

1–4 g/kg depending on timing and tolerance. Supports glycogen levels, blood glucose, and cognitive readiness.

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During Training

 

Recommended when sessions:

  • last >60 minutes

  • involve repeated high‑intensity bursts

  • occur in heat

  • occur multiple times per day.

Target: 30–60 g/hour

Sources: sports drinks, fruit, gels, soft carbohydrate foods.

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Post‑Training (0–2 hours)

 

1.0–1.2 g/kg/hour for 2–4 hours

Supports glycogen replenishment, recovery, and next‑day performance.

Pairing carbohydrates with protein enhances glycogen resynthesis (Amawi, 2024a; Capra, 2024; Desbrow, 2021; Everett, 2025; Hecht, 2023).

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Carbohydrates, Growth, and Injury Prevention

 

Carbohydrate intake influences:

  • bone turnover

  • connective tissue recovery

  • hormonal balance

  • energy availability

  • injury risk.

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Low carbohydrate availability is associated with:

  • increased bone resorption

  • impaired immune function

  • reduced training quality

  • higher injury susceptibility (Amawi, 2024a; Alcock, 2024; Capra, 2024; Desbrow, 2021; Everett, 2025; Hecht, 2023).

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Carbohydrates and Eating Disorder Risk

 

Many junior athletes:

  • under‑consume carbohydrates

  • experience energy imbalance

  • skip meals

  • rely on restrictive patterns

  • show elevated risk for disordered eating.

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Low carbohydrate intake can contribute to:

  • energy deficiency

  • compensatory behaviours

  • performance anxiety

  • body image concerns

Adequate carbohydrate intake is a protective factor.(Amawi, 2024a).

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Practical Carbohydrate Strategies 

 
Daily Structure

  • Breakfast: whole grains + fruit

  • School snacks: portable carbohydrates

  • Lunch: grains + fruit + vegetables

  • Pre‑training: easy‑to‑digest carbohydrates

  • During training: carbohydrates if >60 min

  • Post‑training: carbohydrates + protein

  • Dinner: balanced plate

  • Evening: optional carbohydrate snack.

 
High‑Quality Carbohydrate Sources

Whole foods: oats, rice, pasta, potatoes, quinoa, fruit, milk/yogurt, legumes

Performance‑focused: sports drinks, fruit purées, gels, soft granola bars.

 
Tournament Days

  • Increase total CHO to 8–12 g/kg/day

  • Emphasise frequent intake

  • Prioritise rapid‑absorption carbohydrates between matches (Capra, 2024; Desbrow, 2021; Everett, 2025).

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Youth‑Friendly Explanation

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Why Carbs Matter

 

Carbs give you:

  • energy

  • speed

  • power

  • focus

  • endurance.

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They help you:

  • train harder

  • recover faster

  • think clearly

  • avoid fatigue

 
What Works

  • eating carbohydrates throughout the day

  • fuelling before training

  • refuelling after training

  • choosing whole foods most of the time.

 
What Doesn’t Work

  • skipping meals

  • low‑carb diets

  • training on empty

  • relying only on protein.

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