7.1 School Nutrition, Exercise, and Physical Wellness

Introduction to School Health Promotion and Wellness

School health promotion is a foundational responsibility of the Certified School Nurse (NCSN). Schools provide a unique environmental setting to establish lifelong healthy behaviors, promote physical growth, prevent chronic disease, and reduce academic barriers. The Whole School, Whole Community, Whole Child (WSCC) model—developed by the CDC and ASCD—serves as the overarching framework for school health. It emphasizes the alignment of health promotion policies, physical environments, community involvement, and school health services to ensure every student is healthy, safe, engaged, supported, and challenged.

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USDA Smart Snacks in School Standards

The Healthy, Hunger-Free Kids Act of 2010 authorized the United States Department of Agriculture (USDA) to establish science-based nutrition standards for all foods and beverages sold in schools outside the federal child nutrition programs. These items are designated as competitive foods because they compete with traditional school lunches and breakfasts (e.g., a la carte items, vending machines, school stores, and snack bars).

Scope and Definition of School Day

The USDA Smart Snacks standards apply to all competitive foods sold on the school campus during the school day, defined officially as the period from the midnight before to 30 minutes after the end of the official school day.

Nutrient Standards for Competitive Foods

To qualify as a Smart Snack, a competitive food item must meet both general standards and specific nutrient limits:

Note on exemptions: Plain nuts, seeds, nut/seed butters, reduced-fat cheese, and dried fruits without added sugars are exempt from the total fat and/or sugar percentage limits.

General Standards for Primary Ingredients

To be eligible, a food product must satisfy at least one of the following primary ingredient criteria:

1. Be a whole grain-rich product (containing ≥ 50% whole grains by weight or listing a whole grain as the first ingredient).
2. Have as the first ingredient a fruit, a vegetable, a dairy product, or a protein food (meat, poultry, seafood, eggs, nuts, seeds).
3. Be a combination food that contains at least ¼ cup of fruit and/or vegetable.

USDA Beverage Standards

Beverage standards vary by grade level to reflect developmental differences:

• Elementary & Middle School: Plain water (carbonated or non-carbonated); unflavored low-fat (1%) milk or fat-free milk (including nutritionally equivalent milk alternatives); 100% fruit or vegetable juice (and 100% juice diluted with water, no added sweeteners). Portion sizes are capped at 8 ounces for elementary schools and 12 ounces for middle schools.
• High School: May offer elementary/middle options up to 12 ounces. Additionally, high schools may offer calorie-free flavored waters and low-calorie beverages (≤ 40 calories per 8 oz, or ≤ 60 calories per 20 oz container).

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National School Lunch Program (NSLP) and School Breakfast Program (SBP)

The National School Lunch Program (NSLP) and School Breakfast Program (SBP) are federally assisted meal programs operating in public and nonprofit private schools. They provide nutritionally balanced, low-cost or free meals to children each school day.

Nutritional Meal Patterns by Grade Group

Federal meal patterns are categorized into three age-grade groups: K–5, 6–8, and 9–12. Standards mandate:

• Increased Fruit and Vegetables: Schools must offer both fruits and vegetables daily. Students are required to select at least ½ cup of fruit or vegetable for a meal to qualify for federal reimbursement.
• Vegetable Subgroups: Weekly meal plans must feature items from five distinct vegetable subgroups: dark green, red/orange, beans/peas (legumes), starchy, and other.
• Sodium Reduction Targets: Phased, progressive reductions in sodium content across all age groups.
• Fluid Milk: Must be low-fat (1%) or fat-free; unflavored and flavored options must meet strict calorie and sugar ceilings.

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Physical Activity Recommendations and Physical Education

Physical activity is vital for physical health, cardiovascular fitness, metabolic regulation, cognitive function, and emotional well-being.

CDC and AAP Guidelines

The CDC and the American Academy of Pediatrics (AAP) recommend that children and adolescents aged 6 through 17 years participate in at least 60 minutes (1 hour) of moderate-to-vigorous physical activity (MVPA) daily.

Daily Physical Activity Spectrum (60+ Minutes total)
├── Aerobic Activity: Most of the 60+ minutes daily (e.g., running, soccer, brisk walking)
├── Muscle-Strengthening: At least 3 days per week (e.g., gymnastics, climbing, resistance exercises)
└── Bone-Strengthening: At least 3 days per week (e.g., jumping rope, running, hopscotch)

School Physical Education (PE) Standards

Quality Physical Education programs provide sequential, standards-based instruction. The Society of Health and Physical Educators (SHAPE America) recommends:

• Elementary Schools: Minimum of 150 minutes of structured PE per week.
• Middle & High Schools: Minimum of 225 minutes of structured PE per week.

School nurses advocate for PE programs that emphasize inclusive participation, lifetime physical literacy, and avoidance of physical activity as a form of discipline.

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Recess Policies and Active School Environments

Recess is a necessary component of child development and should not be replaced by academic instruction or physical education.

Recess Guidelines and Benefits

• Minimum Duration: AAP recommends at least 20 minutes of unstructured, active recess daily for elementary students.
• Recess Before Lunch (RBL): Research demonstrates substantial benefits when recess is scheduled immediately prior to lunch rather than after:
  • Food waste is reduced by up to 30%.
  • Student consumption of fruits, vegetables, and calcium-rich milk increases significantly.
  • Classroom behavioral disruption post-lunch drops markedly because children enter the cafeteria relaxed and focused on eating.
• Policy Mandate against Retaliatory Discipline: Recess must never be withheld as a punishment or to complete overdue schoolwork. Withholding physical activity deprives students of essential cognitive breaks and behavioral regulation opportunities.

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Exertional Heat Illness (EHI) Prevention and Wet Bulb Globe Temperature (WBGT)

As school nurses oversee student-athletes and outdoor physical activities, environmental heat safety is a critical clinical liability. Heat illness is entirely preventable with proper monitoring and acclimatization protocols.

Heat Index vs. Wet Bulb Globe Temperature (WBGT)

While the traditional Heat Index measures only air temperature and relative humidity in the shade, the Wet Bulb Globe Temperature (WBGT) is the gold standard for environmental monitoring in athletics. WBGT measures ambient temperature, relative humidity, wind speed, and solar radiation (sun angle). It is measured in direct sunlight using a specialized 3-bulb instrument.

WBGT Activity Guidelines and Flag Categories

Exertional Heat Illness Spectrum and Emergency Protocols

1. Heat Cramps: Involuntary, painful muscle spasms caused by electrolyte imbalance and dehydration. Treatment: Rest in shade, gentle stretching, oral rehydration with electrolyte solution.
2. Heat Exhaustion: Core body temperature < 104°F (40°C), profuse sweating, pale/cool skin, dizziness, headache, nausea, tachycardia. Treatment: Move to air-conditioned area, remove heavy clothing, elevate legs, cold compresses, oral fluids if conscious.
3. Heat Stroke (MEDICAL EMERGENCY): Core body temperature > 104°F (40°C), altered mental status (confusion, delirium, seizures, coma), hot skin (may be sweating or dry), collapse. Treatment: "Cool First, Transport Second." Initiate immediate Cold Water Immersion (CWI) in a tub of iced water (target core temperature < 102°F within 30 minutes) before EMS transport.

Heat Acclimatization Standard

Student-athletes require a 10 to 14-day heat acclimatization period at the start of fall practice. Equipment and practice duration must be introduced progressively (e.g., Day 1–2: helmets only, max 3 hours; Day 3–5: helmets and shoulder pads; Day 6: full pads).

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School Nurse Interventions for Chronic Absenteeism

Chronic absenteeism is defined as missing 10% or more of school days within an academic year (equivalent to approximately 18 days in a standard 180-day school calendar), including excused absences, unexcused absences, and suspensions.

Health-Related Causes of Absenteeism

Health problems represent the leading cause of excused chronic absenteeism. Unmanaged chronic conditions—most notably pediatric asthma (the #1 medical cause of school absence)—as well as severe dental caries, chronic somatic complaints (headaches, abdominal pain driven by anxiety), and sleep disorders directly erode attendance.

Evidence-Based School Nursing Actions

• Direct Case Management: Establish Individualized Healthcare Plans (IHPs) and Emergency Action Plans (EAPs) for students with chronic conditions.
• Asthma Action Plans: Ensure stock albuterol availability, verify self-carry competency, and monitor peak flow trends.
• Multi-Tiered Attendance Teams: Serve on school attendance committees to identify health patterns behind frequent absences.
• Addressing Social Determinants of Health (SDOH): Connect families with transportation assistance, community health centers, food pantries, and stable housing resources.