Major Life Activities Under the ADA: Full List and Legal Standard

Major life activities under the ADA are the everyday actions and internal bodily functions federal law uses to decide who counts as having a protected disability. The statute at 42 U.S.C. § 12102 lists activities like walking, seeing, eating, sleeping, concentrating, and working, along with bodily functions like immune system operation, digestion, and brain function.¹ If a physical or mental impairment substantially limits any one of them, you qualify for protection against discrimination and can request reasonable accommodations from covered employers and public entities.

The Full List of Major Life Activities

The statute at 42 U.S.C. § 12102(2)(A) sets out a starting list, and the EEOC’s regulations at 29 C.F.R. § 1630.2(i)(1)(i) add a few more. Together they cover physical movement, sensory function, cognition, and communication.²

The activities named in the statute:

Caring for oneself
Performing manual tasks
Seeing
Hearing
Eating
Sleeping
Walking
Standing
Lifting
Bending
Speaking
Breathing
Learning
Reading
Concentrating
Thinking
Communicating
Working

The EEOC regulations add sitting, reaching, and interacting with others.² Those additions carry the same legal weight as the statutory list. A spinal condition that makes prolonged sitting painful is covered. Severe social anxiety that limits interaction with others is covered.

Working sits on the list but has an unusual role. The EEOC treats it as a fallback, and its regulations note that only in “rare cases” would a person need to rely on working itself as the limited activity. In practice, coverage is usually established through some other activity on the list.²

Major Bodily Functions Count Too

Before 2008, people with chronic illnesses and internal conditions often struggled to prove disability because their impairments did not visibly affect an external activity like walking or lifting. The ADA Amendments Act added a second category: the operation of a major bodily function is itself a major life activity.¹

The statute specifically lists:

Immune system function (covers conditions like HIV/AIDS and autoimmune disorders)
Normal cell growth (covers cancer)
Digestive, bowel, and bladder functions (covers Crohn’s disease, IBS, kidney disease)
Neurological and brain functions (covers epilepsy, multiple sclerosis, traumatic brain injuries)
Respiratory and circulatory functions (covers asthma, COPD, heart disease)
Endocrine function (covers diabetes and thyroid disorders)
Reproductive functions (covers infertility and related conditions)

This change eliminated the need to link an internal condition to an external limitation. A person with diabetes no longer has to argue their condition limits walking or eating. They can point directly to impaired endocrine function.³

The List Is Not Closed

Both the statute and the EEOC regulations use the phrase “including, but not limited to” before their lists. That language is deliberate. The named activities are a floor, not a ceiling.¹ If an unlisted activity is important to daily functioning and an impairment substantially limits it, courts can recognize it as a major life activity. The determination comes down to whether the limitation is real and significant compared to how most people function.

An impairment also only needs to substantially limit one major life activity. Someone whose condition significantly affects only concentration qualifies without also proving limitations in walking, seeing, or anything else.

What “Substantially Limits” Actually Requires

Having an impairment that touches a major life activity is not enough by itself. The impairment must substantially limit the activity. But the phrase is far less demanding than it sounds. The EEOC’s regulations state that “substantially limits” should be construed broadly, that it “is not meant to be a demanding standard,” and that an impairment does not need to prevent or severely restrict the activity to qualify.⁴

The comparison is between how you perform the activity and how most people in the general population perform it. It usually does not require medical studies or statistical evidence. When more detail helps, the regulations point to how much difficulty, effort, or time the activity requires, whether it causes pain, how long you can sustain the activity, and any negative side effects of treatments used to manage the condition.²

Results do not control the analysis. A student with a learning disability who earns high grades can still be substantially limited in learning if they need significantly more time and effort than their peers to reach those grades. The focus is on how the activity is performed, not on the outcomes produced despite the limitation.

Congress intended this whole inquiry to move quickly. The question of whether someone has a disability “should not demand extensive analysis.” Courts and employers are expected to spend their energy on whether discrimination occurred and whether accommodations were provided.³

Medication, Devices, and Other Mitigating Measures Are Ignored

This rule catches many employers and employees off guard. When deciding whether an impairment substantially limits a major life activity, the analysis must disregard the positive effects of treatment, medication, and assistive devices. A person whose epilepsy is well-controlled by medication is still evaluated based on how the condition would function without the medication.¹

The mitigating measures the statute directs must be ignored:

Medication and medical supplies
Equipment, appliances, and prosthetics, including artificial limbs
Hearing aids, cochlear implants, and other implantable hearing devices
Low-vision devices such as magnifiers
Mobility devices and oxygen therapy equipment
Assistive technology
Reasonable accommodations and auxiliary aids
Learned behavioral or adaptive neurological modifications

The single exception is ordinary eyeglasses and contact lenses. If standard corrective lenses fully fix your vision, the corrected vision is what counts. “Ordinary” lenses are those designed to fully correct visual acuity or eliminate refractive error. Low-vision devices like magnifiers are not ordinary lenses and fall under the general rule, so their effects are ignored.⁵

The negative side effects of mitigating measures can also support a disability finding. If medication controls a condition but causes fatigue, nausea, or cognitive fog, those side effects themselves may substantially limit a major life activity.²

Episodic Conditions and Conditions in Remission

Conditions that flare and subside are covered. The ADAAA sets a clear rule: an impairment that is episodic or in remission is a disability if it would substantially limit a major life activity when active.¹

The analysis looks at the condition during its active phase. Cancer in remission that would substantially limit normal cell growth or immune system function when active still qualifies. An employee with PTSD who has stable periods but experiences severe episodes limiting concentrating, sleeping, or interacting with others is protected during the stable periods too. Employers cannot deny accommodations on the ground that the person seems fine at the moment.

What Qualifying Gets You

Once you have a disability that substantially limits a major life activity, employers covered by the ADA must provide reasonable accommodations unless doing so would impose an undue hardship on the business.² Common accommodations include making facilities accessible, restructuring job duties, modifying work schedules, acquiring or modifying equipment, changing policies, providing readers or interpreters, and reassigning the employee to a vacant position.⁶

The process starts when you tell the employer you need an adjustment because of a medical condition. No magic words are required. The request does not need to mention the ADA or the phrase “reasonable accommodation.” When the disability or the need for accommodation is not obvious, the employer can ask for medical documentation confirming the condition and explaining why the accommodation is needed.⁷

One boundary worth knowing. The ADA also protects people who are “regarded as” having a disability, meaning they suffered a prohibited action because of an actual or perceived impairment. That prong does not require proving any major life activity is limited, but it also does not entitle the person to reasonable accommodations. Only people who meet the actual-disability or record-of-a-disability definitions can require accommodations.²

1
Office of the Law Revision Counsel. 42 USC 12102 – Definition of Disability
2
eCFR. 29 CFR Part 1630 – Regulations to Implement the Equal Employment Provisions of the Americans with Disabilities Act
3
U.S. Equal Employment Opportunity Commission. Americans with Disabilities Act Amendments Act of 2008
4
eCFR. 29 CFR 1630.2 – Definitions
5
U.S. Equal Employment Opportunity Commission. Visual Disabilities in the Workplace and the Americans with Disabilities Act
6
U.S. Equal Employment Opportunity Commission. Enforcement Guidance on Reasonable Accommodation and Undue Hardship Under the ADA
7
U.S. Equal Employment Opportunity Commission. Disability Discrimination and Reasonable Accommodation – Medical Inquiries, Leave and Telework