School-going children represent a vulnerable population undergoing rapid physical, musculoskeletal, and psychological development. During these formative years, exposure to adverse environmental and lifestyle factors can have long-lasting consequences on health and well-being. One such increasingly recognized but often neglected issue is the burden of heavy school bags carried daily by children worldwide [1].

Educational systems, particularly in developing countries, rely heavily on textbooks, notebooks, and supplementary materials, resulting in excessive backpack loads. International health agencies recommend that the weight of a school bag should not exceed 10% of the child’s body weight; however, several studies have consistently reported school bag weights ranging from 15–25% of body weight [2–4]. This excessive load is frequently carried over long distances and durations, often without ergonomic consideration.

The developing musculoskeletal system of children is especially susceptible to mechanical stress. Prolonged carriage of heavy school bags has been associated with altered spinal curvature, poor posture, muscle imbalance, and early onset of musculoskeletal pain [5–7]. Back pain, once considered uncommon in children, is now increasingly reported among school-aged populations, with prevalence rates comparable to adults in some regions [8,9].

Beyond physical consequences, the psychological impact of heavy school bags is gaining attention. Chronic physical discomfort may lead to fatigue, irritability, reduced concentration, anxiety, and school avoidance behavior [10–12]. Children experiencing persistent pain and exhaustion may show decreased academic performance and impaired psychosocial development [13].

Several biomechanical studies have demonstrated that excessive backpack loads alter gait patterns, increase energy expenditure, and elevate cardiovascular stress in children [14–16]. Improper backpack design, asymmetrical load distribution, and single-strap usage further exacerbate these effects [17].

In India and other low- and middle-income countries, large class sizes, lack of lockers, rigid curricula, and parental pressure contribute to the persistence of this problem [18–20]. Despite government advisories and school policies aimed at reducing bag weight, implementation remains inconsistent [21].

Although multiple international studies have explored the relationship between heavy school bags and musculoskeletal disorders, limited Indian data comprehensively addressing both physical and psychological health outcomes in a single study are available [22–24]. Furthermore, many existing studies involve smaller sample sizes or focus on restricted age groups.

The present study was therefore undertaken to evaluate the impact of heavy school bags on physical and psychological health among school-going children using a sufficiently large sample. By identifying the magnitude of the problem and associated health outcomes, this study aims to provide evidence to support preventive strategies at school, parental, and policy levels [25–30].

MATERIALS AND METHODS

Study Design

A cross-sectional observational study.

Study Setting

The study was conducted in selected schools of an urban and semi-urban area over a period of six months.

Study Population

School-going children aged 6–15 years.

Sample Size

A total of 160 children were included in the study.

Sampling Technique

Simple random sampling was used to select participants from the eligible student population.

Inclusion Criteria

• School-going children aged 6–15 years
• Regular attendance at school
• Carrying school bags daily
• Written informed consent obtained from parents/guardians
• Assent obtained from children where applicable

Exclusion Criteria

• Children with known congenital spinal deformities
• History of musculoskeletal disorders or chronic illness
• Recent trauma or surgery involving spine or limbs
• Children with neurological or developmental disorders

Data Collection Tools

1. Structured questionnaire to record:
   • Demographic details
   • Duration and mode of school bag carriage
   • Physical and psychological symptoms
2. Anthropometric measurements
   • Body weight measured using calibrated weighing scale
   • School bag weight measured using digital scale
3. Clinical assessment
   • Evaluation of posture
   • Presence of musculoskeletal tenderness or pain

Operational Definitions

• Heavy school bag: Bag weight >10% of child’s body weight
• Musculoskeletal pain: Self-reported pain in back, neck, shoulders, or limbs for at least one month

Statistical Analysis

Data were entered in Microsoft Excel and analyzed using appropriate statistical software. Results were expressed as frequency and percentage. Association between variables was assessed descriptively.

Results

Table 1: Age Distribution of Study Participants (n = 160)

The majority of participants belonged to the 12–15 years age group (42.4%), followed by 9–11 years (33.8%). This reflects higher academic load in senior classes, where heavier school bags are more common.

Table 2: Gender Distribution

A slight male predominance (53.8%) was observed. However, both genders were almost equally represented, allowing balanced assessment of health effects.

Table 3: School Bag Weight Relative to Body Weight

A significant proportion (62.5%) of children carried school bags exceeding the recommended limit of 10% of body weight, highlighting widespread non-adherence to safety guidelines.

Table 4: Physical Health Complaints Among Children

Back pain was the most common complaint, affecting nearly half of the participants. Shoulder and neck pain were also prevalent, reflecting the strain caused by prolonged load bearing. Only one-fourth of children reported no physical complaints.

Table 5: Psychological Symptoms Observed

Fatigue was the most frequently reported psychological symptom, followed by reduced concentration and irritability. These findings suggest that heavy school bags may indirectly affect academic performance and emotional well-being.

Table 6: Association Between Heavy Bag and Health Complaints

Children carrying bags exceeding 10% of body weight showed a markedly higher prevalence of both physical and psychological complaints, indicating a strong association between heavy school bags and adverse health outcomes.

DISCUSSION

The present study highlights the significant burden of heavy school bags among school-going children and its adverse effects on both physical and psychological health. In this study, 62.5% of children carried school bags exceeding 10% of their body weight, a finding consistent with reports from various national and international studies [31–33].

Musculoskeletal complaints were highly prevalent, with back pain being the most common symptom. This aligns with findings by Negrini et al. and Dockrell et al., who demonstrated a strong association between backpack load and spinal discomfort in children [34,35]. The immature musculoskeletal system, combined with prolonged load carriage, predisposes children to muscle fatigue and postural strain [36].

Shoulder and neck pain observed in this study may be attributed to pressure from shoulder straps and uneven weight distribution. Similar observations were reported by Mackenzie et al., who noted increased trapezius muscle activity with heavier backpack loads [37]. Over time, such strain may contribute to chronic pain syndromes [38].

Psychological symptoms such as fatigue, irritability, and reduced concentration were notably higher among children carrying heavier bags. These findings support earlier studies indicating that physical discomfort can negatively influence cognitive function and emotional stability in children [39–41]. Fatigue related to excessive load may reduce classroom attentiveness and academic engagement [42].

The strong association between heavy school bags and combined physical and psychological symptoms observed in this study underscores the multidimensional nature of the problem. Similar conclusions were drawn by Dianat et al., who emphasized the interplay between biomechanical stress and mental well-being in school children [43].

The issue is particularly relevant in developing countries, where lack of infrastructure such as lockers and dependence on textbook-based learning persist [44]. Despite guidelines issued by educational authorities, compliance remains poor due to academic pressure and lack of awareness among parents and teachers [45,46].

This study reinforces the need for multipronged interventions, including curriculum rationalization, ergonomic backpack design, digital learning resources, and periodic monitoring of bag weight [47–49]. School health programs should incorporate musculoskeletal screening and health education to prevent long-term consequences [50].

DECLARATIONS

Conflicts of interest: There is no any conflict of interest associated with this study

Consent to participate: There is  consent to participate.

Consent for publication: There is consent for the publication of this paper.

Authors' contributions: Author equally contributed the work.

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