7.1 Canadian 24-Hour Movement Guidelines for Adults & Youth

7.1 Canadian 24-Hour Movement Guidelines for Adults & Youth

For decades, public health recommendations approached physical activity, sedentary behaviour, and sleep as separate, independent health determinants. An individual might exercise for 30 minutes at a fitness facility, yet remain seated at a desk for 9 hours and sleep poorly for 5 hours. Contemporary movement epidemiology demonstrates that human health is not governed solely by isolated bouts of intentional exercise. Instead, health outcomes are dictated by the cumulative, synergistic interaction of movement behaviours across the continuous 24-hour day.

For candidates preparing for the CSEP-CPT Theory Exam, mastering the specific numerical thresholds, target populations, age-stratified criteria, and physiological justifications embedded within the Canadian 24-Hour Movement Guidelines is essential for both examination performance and evidence-based exercise prescription.

---

The 24-Hour Movement Paradigm: Move, Sleep, Sit

The fundamental philosophy of the Canadian 24-Hour Movement Guidelines is that the whole day matters. Time spent in one movement state directly displaces time available for another. The daily 24-hour continuum is partitioned into four primary components:

1. Sweat (Moderate-to-Vigorous Physical Activity - MVPA): Aerobic and anaerobic activities that elevate heart rate, increase ventilation, and induce metabolic overload.
2. Step (Light Physical Activity - LPA): Incidental, non-structured physical movement performed throughout waking hours that elevates energy expenditure above resting levels without provoking substantial cardiorespiratory strain.
3. Sleep: Continuous, restorative physiological sleep that regulates endocrine function, neurological recovery, metabolic homeostasis, and tissue repair.
4. Sit (Sedentary Behaviour): Any waking behaviour characterized by an energy expenditure $\le 1.5$ metabolic equivalents (METs) while in a sitting, reclining, or lying posture.

                    THE 24-HOUR MOVEMENT CONTINUUM
  ┌────────────────────────────────────────────────────────────────┐
  │                            24 HOURS                            │
  ├──────────────┬───────────────────┬──────────────┬──────────────┤
  │    SWEAT     │       STEP        │    SLEEP     │     SIT      │
  │  (MVPA, >3.0 │ (LPA, 1.6-2.9 MET)│ (Restorative │ (Sedentary,  │
  │    METs)     │ Standing, Walking │  7-9 Hours)  │  ≤1.5 METs)  │
  └──────────────┴───────────────────┴──────────────┴──────────────┘
         ▲                 ▲                               │
         └─────────────────┴── Reallocate 30-60 min ───────┘

---

Guidelines for Adults (Ages 18 to 64 Years)

The guidelines for adults establish an optimal balance of daily movement associated with reduced risks of all-cause mortality, cardiovascular disease, type 2 diabetes, certain cancers (including colon and breast cancer), anxiety, depression, and cognitive decline.

1. Physical Activity Recommendations ("Move More")

• Aerobic Volume: Accumulate at least 150 minutes per week of moderate-to-vigorous physical activity (MVPA).
• Removal of the Bout Restriction: In previous guideline iterations, aerobic activity was required to be accumulated in discrete bouts of at least 10 minutes. Based on rigorous epidemiological evidence demonstrating that physical activity accumulated in intermittent bouts of any duration confers equivalent cardiometabolic benefits, the current guidelines no longer require bouts to be 10 minutes or longer. Every minute of movement contributes to the 150-minute threshold.
• Muscle Strengthening: Incorporate muscle-strengthening activities targeting major muscle groups (chest, back, legs, shoulders, arms, abdomen) at least 2 days per week.
• Light Physical Activity: Incorporate several hours of light physical activity daily, including standing, casual walking, and activities of daily living.

2. Sleep Recommendations ("Sleep Well")

• Duration: Regularly obtain 7 to 9 hours of good quality sleep per night.
• Consistency: Maintain consistent bed and wake times to support circadian rhythm synchronization and metabolic health.

3. Sedentary Behaviour Recommendations ("Sit Less")

• Daily Total Limit: Limit total sedentary time to 8 hours or less per day.
• Recreational Screen Time: Accumulate no more than 3 hours of recreational screen time per day.
• Intermittent Breaks: Actively break up continuous periods of sitting as frequently as possible (e.g., standing or moving for 1 to 2 minutes every 30 to 60 minutes).

---

Guidelines for Older Adults (Ages 65 Years and Older)

Older adults experience age-related biological declines, including sarcopenia (loss of muscle mass and contractile strength), dynapenia (loss of muscular power), diminished bone mineral density, and impaired neuromuscular proprioception. The guidelines for adults aged 65 and older are calibrated to maintain functional independence, preserve cognitive function, and mitigate traumatic fall risk.

Core Differences from Younger Adults

While older adults share the same baseline volume requirements as younger adults (150 minutes/week of MVPA, 2 days/week of resistance training, and $\le 8$ hours of sitting), their guidelines feature two critical distinctions:

1. Mandatory Balance Challenge Activities: Older adults must incorporate physical activities that challenge balance as a regular component of their movement routine. Neuromuscular balance exercises—such as tandem stance, single-leg balancing, heel-to-toe walking, and tai chi—stimulate vestibular, visual, and somatosensory proprioceptive pathways to reduce fall frequency and fall-related fractures.
2. Adjusted Sleep Target: Recommended sleep duration shifts slightly to 7 to 8 hours of quality sleep per night, reflecting normal age-related alterations in sleep architecture and circadian regulation.

                      OLDER ADULT BALANCE INTEGRATION
  ┌─────────────────────────────────────────────────────────────────┐
  │                       FUNCTIONAL AUTONOMY                       │
  ├───────────────────────────────┬─────────────────────────────────┤
  │  Standard Adult Requirements: │ Older Adult Core Addition:      │
  │  • 150 min/wk MVPA            │ • Activities Challenging        │
  │  • 2 days/wk Muscle Training  │   Balance (Fall Mitigation)     │
  │  • ≤ 8 hours Sedentary Time   │ • Modified Sleep: 7-8 hours/day │
  └───────────────────────────────┴─────────────────────────────────┘

---

Guidelines for Children and Youth (Ages 5 to 17 Years)

For school-aged children and adolescents, the guidelines provide recommendations to support rapid somatic growth, optimal neurodevelopment, cardiometabolic resilience, skeletal mineralization, and academic performance.

The "Sweat, Step, Sleep, Sit" Criteria for Youth

1. Sweat (MVPA): Accumulate at least 60 minutes per day of moderate-to-vigorous physical activity, primarily consisting of aerobic exercise.
   • Vigorous Intensity: Incorporate vigorous-intensity physical activities (such as sprinting, soccer, swimming, or vigorous cycling) at least 3 days per week.
   • Muscle and Bone Strengthening: Engage in activities that strengthen muscle and bone (such as jumping, hopping, climbing, gymnastics, or structured bodyweight resistance training) at least 3 days per week.
2. Step (LPA): Engage in several hours of structured and unstructured light physical activities daily (e.g., active play, walking to school).
3. Sleep:
   • Children aged 5 to 13 years: Require uninterrupted, restorative sleep of 9 to 11 hours per night.
   • Adolescents aged 14 to 17 years: Require uninterrupted, restorative sleep of 8 to 10 hours per night.
   • Consistent sleep and wake times are vital for hormonal regulation (specifically human growth hormone [hGH] pulsatile release).
4. Sit (Sedentary Behaviour):
   • Recreational Screen Time: Restrict recreational screen time (tablets, smartphones, television, video games) to no more than 2 hours per day.
   • Limit prolonged sitting; break up seated sedentary periods with active movement.

---

The Early Years (Ages 0 to 4 Years)

CSEP also established guidelines for infants, toddlers, and preschoolers to optimize early neuromuscular coordination, skeletal development, and emotional regulation:

• Infants (< 1 year): Being physically active several times daily through interactive floor-based play, including at least 30 minutes of tummy time spread throughout waking hours for non-mobile infants. Zero screen time.
• Toddlers (1 to 2 years): At least 180 minutes of physical activity at any intensity spread throughout the day. For 1-year-olds, sedentary screen time is not recommended; for 2-year-olds, screen time should not exceed 1 hour daily.
• Preschoolers (3 to 4 years): At least 180 minutes of physical activity per day, of which at least 60 minutes must be energetic play (moderate-to-vigorous intensity). Recreational screen time must not exceed 1 hour per day.

---

Compositional Data Analysis & Isotemporal Substitution

A critical theoretical advance underlying the 24-hour guidelines is isotemporal substitution modeling within compositional data analysis. Because the minutes in a day are finite ($1,440\text{ minutes}$), increasing time in one behaviour necessitates an equivalent reduction in one or more other behaviours.

Health Impact of Time Reallocation

• Replacing 30 minutes of Sedentary Time with 30 minutes of MVPA: Yields marked, statistically robust reductions in fasting glucose, glycated hemoglobin ($\text{HbA}_{1c}$), visceral adiposity, triglycerides, and all-cause mortality risk ($10\%$ to $25\%$ risk reduction).
• Replacing 30 minutes of Sedentary Time with 30 minutes of LPA: Produces measurable, beneficial improvements in insulin sensitivity, blood pressure regulation, and vascular endothelial function, demonstrating that even low-intensity movement provides valuable biological protection.
• Replacing 30 minutes of Sleep with 30 minutes of Screen Time: Induces elevated cortisol, impaired glucose tolerance, decreased cognitive focus, and higher systemic inflammatory markers.

---

Canadian 24-Hour Movement Guidelines Lifespan Comparison Table