Section 504 Major Life Activities: Definition and Examples

Under Section 504 of the Rehabilitation Act, major life activities are the everyday functions a person must be substantially limited in to qualify as having a disability. They include obvious physical and mental tasks like walking, seeing, hearing, speaking, breathing, learning, and working, and also less visible ones like concentrating, sleeping, eating, and reading. The operation of major bodily systems, including the immune, digestive, neurological, and endocrine systems, counts too. If an impairment substantially limits even one of these, the eligibility standard is met.

The Activities the Regulation Names

The federal regulation at 34 C.F.R. § 104.3 defines major life activities as functions such as caring for yourself, performing manual tasks, walking, seeing, hearing, speaking, breathing, learning, and working.¹ The phrase “such as” is doing real work in that sentence. The list was always meant to be illustrative rather than exhaustive, and the ADA Amendments Act of 2008 expanded it considerably.

Under the amended federal definition, major life activities now explicitly include eating, sleeping, standing, lifting, bending, reading, concentrating, thinking, and communicating, in addition to the activities already named in the Section 504 regulation.² Section 504 now incorporates the broader standards from the ADA Amendments Act, so this expanded list applies to 504 eligibility as well.³

Even activities that appear on no published list can qualify if they are central to daily life. A student whose impairment prevents them from sitting comfortably for extended periods faces a limitation on a basic function most people take for granted. The question is whether the activity is important enough that most people in the general population perform it routinely.

Major Bodily Functions Also Count

Before 2008, courts sometimes denied claims when an impairment affected internal body processes rather than visible physical tasks. The ADA Amendments Act closed that gap by declaring that the operation of a major bodily function is itself a major life activity. The statute specifically names the functions of the immune system, normal cell growth, and the digestive, bowel, bladder, neurological, brain, respiratory, circulatory, endocrine, and reproductive systems.²

This has enormous practical importance. A student with Type 1 diabetes has an impairment that affects endocrine function. A student with Crohn’s disease has an impairment affecting digestive and bowel function. Neither condition necessarily prevents the student from walking or talking, but both substantially limit a major bodily function, and that is enough. An impairment affecting even a single bodily function can qualify a person for protection.

How “Substantially Limits” Fits Into the Analysis

Naming the activity is only half the test. The impairment must substantially limit that activity. Before 2008, some courts interpreted “substantially limits” so narrowly that only the most severe impairments qualified. Congress responded by directing that the phrase be read broadly, in favor of expansive coverage, and that the analysis should not demand extensive documentation or proof.⁴

The comparison is between how you perform the activity and how the average person in the general population performs it. An impairment does not need to prevent or severely restrict the activity to count. If it makes the activity notably harder, takes longer, causes pain, or requires unusual effort, that can be enough.

Ignore Medication, Devices, and Coping Strategies

When evaluating whether a limitation is substantial, schools and other covered entities must look at the impairment in its untreated state. Medication, hearing aids, prosthetics, assistive technology, and learned behavioral modifications are all set aside for this analysis.³ A student whose ADHD is well-controlled with medication still qualifies if the underlying condition would substantially limit concentration or learning without that medication.

There is one exception. Ordinary eyeglasses or contact lenses designed to fully correct visual acuity are considered when determining whether a vision impairment is substantially limiting. Low-vision devices that magnify or enhance images do not fall under this exception and are treated the same as other mitigating measures.³

Episodic Conditions and Conditions in Remission

Conditions that flare and subside still qualify. An impairment that is episodic or in remission is considered a disability if it would substantially limit a major life activity when active.⁴ Epilepsy is a clear example. A student who goes weeks between seizures is not less disabled during those weeks. The relevant question is what the condition does when active, not whether the student happens to be symptom-free on the day of the evaluation.

Temporary Impairments

A temporary condition does not automatically qualify, but it is not automatically disqualified either. The determination is case-by-case and hinges on both the duration and the severity of the limitation. A broken leg that heals in six weeks with no complications is unlikely to qualify. A traumatic brain injury that substantially limits concentration for several months might. The Department of Education has noted that an impairment with an expected duration of six months or less that is also minor would not qualify under the “regarded as” prong of the disability definition, though a short-duration impairment that is genuinely severe could still meet the standard.³

Examples: Which Activities Common Conditions Limit

Because Section 504 uses a functional definition rather than a list of qualifying diagnoses, almost any physical or mental impairment can qualify if it substantially limits a major life activity. Certain conditions come up repeatedly, and each maps to particular activities on the list.

ADHD typically limits concentrating, thinking, and learning. It is one of the most common reasons students receive 504 plans.
Diabetes affects endocrine function and may limit eating, energy regulation, and concentration.
Asthma limits breathing and respiratory function, especially during physical activity.
Severe allergies can limit immune system function, eating, and breathing, depending on the allergen and the reaction.
Epilepsy affects neurological and brain function, with episodic limitations on concentration and consciousness.
Anxiety and depression can limit concentrating, thinking, learning, sleeping, and interacting with others.
Dyslexia and other learning disabilities limit reading, learning, and sometimes communicating. Students with more severe learning disabilities may qualify under the IDEA instead.
Chronic illnesses like Crohn’s disease, sickle cell anemia, and autoimmune disorders affect various bodily functions and often limit energy, attendance, and concentration.

A Qualifying Activity Is Not the Same as Eligibility

Identifying a major life activity that is affected is one step. It is not the whole determination. A diagnosis alone is never enough, and neither is pointing to an activity on the list. The 504 team must still find that the specific student’s condition creates a substantial limitation on that activity when the impairment is viewed without mitigating measures. Two students with the same diagnosis can have very different functional impacts, and only the one whose daily functioning is substantially limited will qualify.

The evaluation itself draws from multiple sources, including achievement and aptitude tests, teacher observations, the student’s physical condition, social and cultural background, and adaptive behavior. All of this data must be documented, and the final decision must be made by a group of people who are familiar with the student, understand the evaluation data, and know the available placement options.⁵ Outside medical documentation strengthens the case but does not replace the team’s judgment.

The practical upshot for parents and adults navigating a 504 request: identify which major life activity or bodily function the condition affects, describe how the impairment limits that activity compared to the average person, and describe it as it operates without medication, devices, or workarounds. That framing lines up with how the law reads the definition, and it is the framing the evaluation team is required to apply.

1
eCFR. 34 CFR 104.3 – Definitions
2
Office of the Law Revision Counsel. 42 USC 12102 – Definition of Disability
3
U.S. Department of Education. Frequently Asked Questions – Section 504 Free Appropriate Public Education
4
U.S. Equal Employment Opportunity Commission. Fact Sheet on the EEOC’s Final Regulations Implementing the ADAAA
5
eCFR. 34 CFR 104.35 – Evaluation and Placement