Adjustable Beds Explained - Sleep, Health and Comfort Benefits

An adjustable bed is a motorized sleep system that uses an electric frame to elevate the head, legs, or both for customized comfort and support.

Unlike fixed bed types, adjustable beds actively change position through a remote control, allowing users to fine-tune elevation angles for sleep, rest, or recovery.

Adjustable bed with electric base showing head and leg elevation in a modern bedroom

What Is an Adjustable Bed?

An adjustable bed, also called an electric bed or adjustable sleep system, consists of two core components –

  • Adjustable base – A powered base with articulated joints that create head lift, leg lift, and full-body elevation.
  • Compatible mattress – A flexible mattress designed to bend with the base without losing structural integrity.

This bed that moves supports advanced positions such as zero-gravity, where the head and legs elevate simultaneously to reduce spinal pressure and improve circulation. Many models also include dual base configurations, enabling independent adjustments on each side of the bed.

Who Are Adjustable Beds For?

Adjustable beds serve users who prioritize comfort, health, and personalization during sleep. Common user groups include –

  • Sleep optimization seekers – People who want precise control over head lift and leg elevation for better sleep posture.
  • Health-focused sleepers – Users managing back pain, acid reflux, circulation issues, or post-surgery recovery.
  • Couples with different needs – Partners who benefit from a dual base with independent controls.
  • Lifestyle users – Readers, TV watchers, and remote workers who use bed elevation for seated comfort.

Why Adjustable Beds Exist

The purpose of adjustable beds is to adapt the sleep surface to the body, not force the body to adapt to the bed. Traditional bed types remain static, while an adjustable sleep system actively responds to how people rest, recover, and relax.

Key functional advantages include –

  • Targeted elevation for pressure relief
  • Motorized head lift for breathing and reflux support
  • Leg elevation to reduce swelling and fatigue
  • Simple operation via remote control

How Adjustable Beds Work

Adjustable beds work through a motorized lift system that moves segmented frame sections to raise or lower the head and foot areas on demand.

This electric adjustable bed frame converts user input from a remote system into precise mechanical motion, creating controlled incline changes for comfort, support, and functionality.

Electric adjustable bed frame showing actuators, motorized lift, and frame articulation

Core Mechanism of an Adjustable Bed

Every adjustable bed relies on three mechanical elements – actuators, articulated frame sections, and a control system.

  • Actuators – Electric motors mounted beneath the base generate force to lift or lower sections of the frame.
  • Frame sections – The base is divided into articulated zones, typically head, lumbar, and foot, that move independently.
  • Remote system – A wired or wireless remote sends signals to the motors, triggering movement.

This structure allows smooth base articulation, meaning the bed bends at engineered hinge points instead of lifting as a single flat surface.

Motor Systems and Movement

A motorized sleep system uses low-voltage electric motors to deliver consistent, quiet motion.

Each actuator controls a specific section, enabling –

  • Head elevation – Raises the upper body for reading, breathing support, or reflux relief.
  • Foot elevation – Lifts the legs to reduce pressure and improve circulation.
  • Combined incline – Activates preset positions such as zero-gravity.

The incline range varies by model but typically spans –

  • Head lift – 0°-60°
  • Foot lift – 0°-45°

These ranges define the full incline bed function and determine how adaptable the base feels in daily use.

Control Systems and Position Memory

Most modern adjustable beds use wireless controls with programmable position memory. These controls allow users to –

  • Adjust head and foot angles independently
  • Save preferred positions as control presets
  • Return to flat instantly with one button

Higher-end models integrate app-based controls or voice compatibility, but the function remains the same – precise, repeatable positioning through stored memory settings.

Wall-Hugger and Advanced Base Design

A wall-hugger adjustable base shifts the frame backward as it elevates, keeping the sleeper close to the nightstand.

This design improves usability by preventing the bed from sliding away from bedside items during incline adjustments.

Additional engineering features may include –

  • Reinforced steel frames for load stability
  • Syncing systems for dual base operation
  • Emergency power-down functions during outages

Types and Technical Features of Adjustable Beds

Adjustable beds fall into distinct base types and feature sets defined by size configuration, motor count, and integrated comfort technology.

Understanding these variations clarifies which adjustable bed features match specific sleep needs, room layouts, and usage preferences.

Split king adjustable bed with dual bases, massage motors, and wall-hugger design

Types of Adjustable Beds by Base Style

The primary difference among adjustable bed types is how the base is divided and controlled.

Single Base Adjustable Beds

A single base uses one unified frame that moves as a single unit.

  • Available in common bed sizes such as Twin XL, Full, Queen, and King
  • Uses one synchronized power lift system
  • Best for solo sleepers or couples with identical comfort preferences

Split Base Adjustable Beds

A split base divides the bed into two independent platforms, most commonly in split-king configurations.

  • Each side has separate lift motors and controls
  • Supports wireless sync for coordinated movement when desired
  • Ideal for couples with different elevation or firmness needs

Split-king adjustable beds dominate the premium category due to customization flexibility.

Key Technical Features Explained

Modern adjustable beds integrate multiple mechanical and electronic components that define performance and comfort.

Motor Systems and Lift Power

The number of motors determines how precisely the bed adjusts.

  • 2-motor systems – Independent head and foot elevation
  • 3-4 motor systems – Add lumbar or tilt articulation
  • Motors are designed for quiet operation and consistent torque under load

Massage Functionality

A bed with massage uses dedicated vibration motors, separate from lift motors.

  • Common zones – head, lumbar, and legs
  • Multiple intensity levels and wave patterns
  • Designed for relaxation, not medical treatment

Wall-Hugger and Zero Clearance Design

  • Wall-hugger – Keeps the sleeper aligned with the nightstand during incline
  • Zero clearance – Allows placement on platform beds or inside existing frames

Structural and Convenience Features

  • Reinforced frames with enhanced edge support for stability
  • Integrated USB port beds for device charging
  • Emergency battery backup for power outages

Adjustable Bed Sizes and Feature Comparison

Adjustable Bed Type
Common Bed Sizes
Motors
Notable Features
Single Base
Twin XL, Full, Queen
2-3
Zero clearance, USB ports
Split King
2× Twin XL
4-6 total
Wireless sync, dual massage
Premium Luxury Base
Queen, King, Split King
4+
Massage motor, wall-hugger, presets

Benefits of Adjustable Beds (Health + Lifestyle)

Adjustable beds deliver measurable health improvements and daily comfort advantages by optimizing sleep posture through controlled elevation.

By reducing pressure points and improving spinal alignment, an adjustable bed directly supports both medical needs and lifestyle comfort.

Health Benefits of Adjustable Beds

The primary health benefit of adjustable beds is improved body alignment through targeted elevation.

Pain Relief and Spinal Support

Adjustable beds reduce back pain by supporting neutral spinal alignment.

  • Lumbar elevation decreases lower-back compression
  • Head and leg elevation reduce joint stress
  • Custom angles minimize pressure points in hips and shoulders

Clinical sleep studies consistently link improved sleep posture with reduced musculoskeletal discomfort.

Acid Reflux, GERD, and Breathing Support

An adjustable bed alleviates GERD and acid reflux by maintaining an upper body incline during sleep.

  • Elevating the head 6-8 inches limits stomach acid backflow
  • Upper body incline reduces nighttime heartburn
  • Elevated positions support airway openness

This same incline helps reduce snoring and supports users with sleep apnea by improving airflow.

Circulation and Swelling Reduction

Leg elevation improves circulation by assisting venous blood return.

  • Reduces lower-leg swelling
  • Eases pressure in calves and feet
  • Supports recovery after long periods of standing or sitting

Zero-gravity positioning, where knees and head elevate simultaneously, maximizes circulatory efficiency.

Lifestyle and Comfort Benefits

Beyond health, adjustable beds enhance everyday comfort and usability.

Reading, Watching TV, and Working in Bed

Adjustable beds create stable seated positions without pillow stacking.

  • Upright head lift supports reading
  • Reclined positions improve screen viewing
  • Consistent support reduces neck strain

Personalized Sleep Positions

Adjustable beds allow users to fine-tune sleep posture nightly.

  • Flat for deep sleep
  • Slight incline for digestion
  • Elevated legs for recovery

This adaptability leads to better sleep positions and fewer nighttime disruptions.

Summary of Key Benefits

Benefit Category
Adjustable Bed Advantage
Back Pain
Improved spinal alignment
GERD and Reflux
Upper body incline
Snoring and Sleep Apnea
Opened airway positioning
Circulation
Leg elevation
Lifestyle Comfort
Reading, TV, relaxation

Who Should Use an Adjustable Bed?

An adjustable bed is right for people who need adaptive sleep support due to health conditions, lifestyle demands, or mobility limitations.

By functioning as a hospital bed alternative without a clinical appearance, adjustable beds deliver sleep therapy, comfort, and independence across multiple demographics.

Seniors and Aging Adults

Adjustable beds support elderly users by improving mobility, safety, and sleep quality while aging in place.

  • Head and leg elevation reduce joint stiffness
  • Upright positioning assists getting in and out of bed
  • Custom angles improve circulation and breathing

For seniors, an adjustable bed acts as an adaptive sleep system that maintains comfort without caregiver dependency.

People With Chronic Pain or Medical Conditions

Users with chronic conditions benefit from precise sleep posture control.

  • Back pain and arthritis improve through spinal alignment
  • GERD and reflux ease with upper-body elevation
  • Sleep apnea and snoring reduce with airway-supporting incline

These users often replace traditional flat frames with adjustable beds as part of long-term sleep therapy.

Post-Surgery and Recovery Patients

Adjustable beds accelerate recovery by reducing strain during rest.

  • Elevation minimizes swelling
  • Adjustable angles reduce pressure on healing areas
  • Safer repositioning lowers fall risk

Caregivers frequently recommend adjustable beds as a home recovery solution after orthopedic or abdominal procedures.

Athletes and Physically Active Users

Athletes use adjustable beds to enhance muscle recovery and circulation.

  • Leg elevation reduces inflammation
  • Zero-gravity positioning supports spinal decompression
  • Improved sleep depth accelerates recovery cycles

This group uses adjustable beds as performance-support tools, not medical devices.

People With Mobility Issues or Disabilities

Adjustable beds restore independence for users with limited mobility.

  • Motorized positioning reduces physical effort
  • Remote control access supports self-adjustment
  • Frame stability improves safety during transfers

For users with disabilities, an adjustable bed serves as an accessible sleep platform rather than a clinical bed.

Tech-Focused and Comfort-Driven Users

Tech lovers choose adjustable beds for advanced comfort and smart features.

  • Preset memory positions
  • Wireless remotes and app control
  • Integrated USB charging and massage

This demographic prioritizes customization, convenience, and innovation in everyday sleep.

Quick Decision Guide

User Type
Why an Adjustable Bed Helps
Seniors
Mobility support, aging in place
Chronic Pain Sufferers
Pressure relief, alignment
Recovery Patients
Safer rest, faster healing
Athletes
Circulation, muscle recovery
Mobility-Impaired Users
Independence, accessibility
Tech Enthusiasts
Smart comfort features

Compatible Mattresses for Adjustable Beds

The best mattress for an adjustable bed is one that bends easily with the base while maintaining support, pressure relief, and structural integrity.

Mattress bendability, not thickness or brand, determines compatibility with an electric adjustable bed frame.

Memory foam, latex, and hybrid mattresses bending on an adjustable bed base

Mattress Types That Work With Adjustable Beds

Adjustable beds require an articulating mattress designed to flex repeatedly without damage. The following mattress types meet that requirement.

Memory Foam Mattresses

Memory foam mattresses are the most compatible option for adjustable beds.

  • High flexible foam content allows smooth articulation
  • Excellent motion isolation on moving bases
  • Adapts to changing sleep posture without resistance

Adjustable memory foam mattresses dominate the market due to consistent performance across all incline positions.

Latex Mattresses

Latex mattresses work well on adjustable beds when constructed with natural or blended latex layers.

  • Strong elasticity supports repeated bending
  • Maintains shape through compression and release
  • Performs best in medium-firm profiles

Latex offers durability and responsiveness while remaining compatible with base articulation.

Hybrid Mattresses (Selective Compatibility)

Hybrid mattresses are compatible only when coil systems are designed for flexibility.

  • Uses pocketed coils instead of rigid innersprings
  • Requires engineered compression zones near hinges
  • Must be labeled adjustable-base compatible

High-quality hybrids balance foam comfort with coil support but vary widely by design.

Mattress Types That Do NOT Work Well

Some mattress constructions resist bending and reduce adjustable bed performance.

Traditional Innerspring Mattresses

  • Rigid coil units limit articulation
  • Increased stress on coils and frame
  • Reduced lifespan on motorized bases

Mattresses With Border Rods or Reinforced Perimeters

  • Metal edge systems restrict movement
  • Interfere with base hinge points
  • Compromise edge stability during elevation

Key Compatibility Factors to Check

Beyond mattress type, construction details determine real-world performance.

Compatibility Factor
Why It Matters
Mattress Flexibility
Enables smooth base articulation
Thickness (10-14″)
Prevents buckling during incline
Edge Support Design
Maintains stability without rigidity
Weight
Reduces motor strain
Certification
Confirms adjustable-base approval

Foam vs Latex vs Hybrid – Quick Comparison

Mattress Type
Adjustable Bed Compatibility
Notes
Memory Foam
Excellent
Most flexible and reliable
Latex
Very Good
Elastic and durable
Hybrid
Variable
Must use pocketed coils
Innerspring
Poor
Too rigid for articulation

Key Buying Considerations

The most important factors when buying an adjustable bed are durability, feature relevance, compatibility, and total ownership cost.

Evaluating these elements upfront prevents mismatched purchases and ensures long-term performance from an adjustable sleep system.

Adjustable bed delivery and setup showing remote control and clearance space

Price and Total Cost of Ownership

Adjustable bed cost varies based on motor count, materials, and integrated features.

  • Entry-level bases – $500-$900
  • Mid-range models – $1,000-$2,000
  • Premium adjustable beds – $2,500+

Beyond base price, account for –

  • Delivery and setup fees
  • Optional mattress upgrades
  • Extended protection plans

Financing options often reduce upfront cost through monthly payments.

Warranty, Trial, and Risk Reduction

A strong warranty and in-home trial protect long-term value.

  • Frame warranties typically range from 10-25 years
  • Motors often carry 2-5 year coverage
  • An in-home trial of 30-120 nights confirms real comfort

These protections indicate manufacturer confidence and reduce buyer risk.

Delivery, Setup, and Clearance Requirements

Delivery setup affects both usability and safety.

  • Verify clearance for incline and wall-hugger movement
  • Confirm stairway and doorway dimensions
  • Choose white-glove delivery for assembly and testing

Zero-clearance bases simplify installation on platform beds or inside frames.

Features That Matter in Daily Use

Not all adjustable bed features add real value or prioritize function over novelty.

  • Dual control – Essential for couples on split bases
  • Noise level – Motors should operate below 50 dB
  • Load capacity – Standard ranges from 650-850 lbs
  • USB ports – Useful for device charging

Massage and lighting features enhance comfort but do not impact core sleep quality.

Power Reliability and Safety

A power outage fail-safe prevents users from getting stuck in an elevated position.

  • Battery backup systems return the bed to flat
  • Surge protection safeguards electronics
  • Manual overrides add emergency assurance

These safeguards are critical for seniors and users with mobility limitations.

Adjustable Bed Compatibility Checklist

Use this checklist to compare adjustable beds accurately.

Evaluation Area
What to Confirm
Mattress Fit
Adjustable-base compatible
Bed Size
Matches room and sleep needs
Control Type
Wireless remote or app
Motors
Adequate for desired articulation
Clearance
Wall-hugger or zero clearance
Warranty
Frame and motor coverage

Adjustable Beds vs Traditional and Smart Beds

Adjustable beds differ from traditional and smart beds by actively changing sleep posture through motorized elevation, while other bed types rely on passive support or data tracking. This comparison clarifies features, costs, and ideal users for each option.

Adjustable Beds vs Traditional Beds

The core difference is movement versus fixed support.

Traditional Beds (Regular Bed Frames)

A regular bed combines a manual frame with a traditional mattress that remains flat at all times.

  • No elevation or articulation
  • Relies on mattress firmness for comfort
  • Lower upfront cost
  • Limited adaptability for pain, reflux, or circulation

Traditional beds provide passive support, meaning the body adapts to the bed, not the reverse.

Adjustable Beds

An adjustable bed actively changes position to support the body.

  • Motorized head and leg elevation
  • Custom sleep posture for pain and health needs
  • Compatible with foam, latex, and select hybrids
  • Higher cost, significantly higher functionality

Adjustable beds suit users who need comfort flexibility, health support, or lifestyle positioning.

Adjustable Beds vs Smart Beds

Smart beds and adjustable beds solve different sleep problems.

Smart Beds

Smart beds focus on sleep tech, not movement.

  • Built-in smart sensors track sleep stages, heart rate, and breathing
  • Connectivity through apps and cloud platforms
  • Automatic firmness or temperature adjustments (model-dependent)
  • Typically flat or minimally adjustable

Smart beds analyze sleep but rarely change sleep posture.

Smart Adjustable Beds

A smart adjustable bed combines motorized elevation with sleep technology.

  • Full adjustability plus app control
  • Sleep tracking layered onto physical movement
  • Highest cost category
  • Appeals to tech-forward users

This hybrid category delivers both comfort control and data insights.

Feature and Cost Comparison

Bed Type
Key Features
Typical Cost
Best For
Traditional Bed
Flat frame, standard mattress
$300-$800
Budget buyers, minimal needs
Adjustable Bed
Motorized lift, remote control
$900-$2,500+
Pain relief, comfort seekers
Smart Bed
Sensors, sleep data, apps
$1,500-$4,000+
Data-driven sleepers
Smart Adjustable Bed
Adjustability + sleep tech
$3,000-$6,000+
Tech-focused, premium users

Pros and Cons Overview

Adjustable Bed

  • ✅ Active support and elevation
  • ✅ Health and lifestyle benefits
  • ❌ Higher upfront cost

Traditional Bed

  • ✅ Affordable and simple
  • ❌ No adaptability or health positioning

Smart Bed

  • ✅ Detailed sleep insights
  • ❌ Limited physical comfort adjustment

Which Bed Type Is Right for You?

  • Choose an adjustable bed if you want physical comfort, pain relief, or better sleep positions.
  • Choose a traditional bed if budget and simplicity matter most.
  • Choose a smart bed if sleep tracking and technology are the priority.

Smart Features and Innovations in Adjustable Beds

Smart adjustable beds integrate connected technology (apps, sensors, and automation) to enhance comfort, personalization, and sleep optimization.

These innovations transform a motorized base into a responsive smart sleep system that adapts to user habits and digital ecosystems.

Smart adjustable bed with app control, sleep tracking, and smart home integration

App Control and Mobile Connectivity

Modern adjustable beds use mobile apps to replace or enhance traditional remotes.

  • Bluetooth control enables direct app pairing with the bed base
  • Mobile apps adjust head and foot elevation precisely
  • Preset positions sync across devices

An app-controlled bed allows faster adjustments and easier customization than physical remotes alone.

Sleep Tracking and Monitoring Technology

Smart adjustable beds incorporate sleep monitoring to measure sleep quality, not just comfort.

  • Built-in sensors track movement, heart rate, and breathing
  • Sleep stages and duration are recorded nightly
  • Data exports through a sleep data API to health apps

Unlike wearables, these systems collect data passively, without requiring anything worn on the body.

Automation and Smart Home Integration

Smart adjustable beds connect with broader IoT ecosystems for hands-free operation.

  • Voice command beds work with Alexa or Google Assistant
  • Integration with smart home platforms enables lighting and thermostat syncing
  • Automation routines adjust bed position at set times

Some models support IFTTT beds, triggering actions such as lowering the bed when lights turn off.

Advanced Control and Personalization

Technology enhances personalization beyond manual adjustment.

  • Position memory tied to user profiles
  • Automatic incline changes based on sleep behavior
  • Smart alarms that raise the head gradually instead of sounding loudly

These features reduce sleep disruption and promote consistent routines.

The future of adjustable beds centers on predictive comfort and deeper connectivity.

  • AI-driven posture recommendations
  • Health-platform integration for clinicians
  • Expanded interoperability across smart devices

Smart adjustable beds increasingly function as wellness hubs rather than furniture.

Smart Feature Comparison

Smart Feature
Function
User Benefit
App Control
Mobile positioning
Faster, precise adjustments
Sleep Monitoring
Tracks sleep metrics
Data-driven sleep improvement
Voice Commands
Hands-free control
Accessibility and convenience
Automation
Scheduled movements
Routine optimization
Smart Home Sync
IoT connectivity
Seamless environment control

Care, Maintenance and Longevity

Proper care and routine maintenance extend the lifespan of an adjustable bed by protecting motors, moving parts, and electronic components.

With basic upkeep, most adjustable beds last 10-20 years, depending on usage intensity and build quality.

Adjustable bed base showing motors, moving parts, and maintenance inspection areas

Routine Care for Adjustable Beds

Consistent light maintenance prevents premature wear and performance issues.

Cleaning the Adjustable Base

  • Unplug the bed before cleaning
  • Wipe the frame with a dry or lightly damp cloth
  • Avoid spraying liquid near motors or control boxes

Keeping dust away from moving parts reduces friction and overheating.

Mattress Care and Rotation

Mattress rotation protects articulation points and foam integrity.

  • Rotate compatible mattresses every 3-6 months
  • Follow manufacturer guidance for one-sided foam beds
  • Ensure the mattress remains centered on the base

Regular mattress rotation prevents uneven compression and base stress.

Motor and Mechanical Maintenance

Adjustable beds use sealed motors that require minimal intervention.

  • Inspect for unusual motor noise during movement
  • Check bolts and joints annually for tightness
  • Confirm smooth operation across all incline positions

Some manufacturers recommend occasional frame lubrication at hinge points, but only if specified in the manual.

Electrical Components and Safety Checks

Electrical integrity is important for long-term reliability.

  • Inspect the wire harness for pinching or wear
  • Keep cables clear of articulation zones
  • Replace remote batteries as needed

During power outages, test the battery backup system to confirm proper operation.

Troubleshooting Common Issues

Most adjustable bed problems stem from power or connection issues, not motor failure.

Issue
Likely Cause
Quick Fix
Bed won’t move
Power interruption
Check outlet and reset
Uneven movement
Obstructed frame
Clear under-bed area
Loud operation
Loose hardware
Tighten bolts
Remote not working
Dead batteries
Replace batteries

If issues persist, contact warranty service before attempting repairs.

Warranty, Inspection, and Repairs

Regular inspection protects warranty coverage and prevents costly repairs.

  • Review warranty terms for motor and frame coverage
  • Use authorized technicians for service
  • Avoid DIY electrical repairs

Documenting inspections and service calls simplifies claims if repairs are required.

Longevity Expectations

How long adjustable beds last depends on care and usage.

  • Entry-level bases – 8-10 years
  • Mid-range models – 12-15 years
  • Premium adjustable beds – 15-20 years

Limiting excess weight and maintaining proper clearance reduces base wear and motor strain.

FAQ’s

What is an adjustable bed?

An adjustable bed is a bed with a multi‑hinged surface that can be raised or reclined in different positions, typically the head and foot sections, using electric or manual controls. These adjustments help users tailor the bed to their needs for comfort, health, or mobility.

What are the main benefits of using an adjustable bed?

Adjustable beds can improve comfort, sleep quality, circulation, and spinal support. They may also reduce snoring, help with acid reflux and ease pressure on joints, plus they offer greater independence for people with limited mobility.

Who might benefit most from an adjustable bed?

People with chronic back pain, sleep apnea, acid reflux, respiratory issues, circulation problems, limited mobility, or those who enjoy reading or watching TV in bed can all benefit from the versatility of adjustable beds.

What are the disadvantages of adjustable beds?

Adjustable beds are usually heavier and more expensive than standard beds, may require specific mattresses, can be noisier due to motorized parts, and might need occasional maintenance.

Can you use a regular mattress on an adjustable bed frame?

It’s generally not advisable to use a standard mattress. Adjustable beds require flexible mattresses, like memory foam, latex, or flexible pocket‑spring types, that bend easily with the frame without damage.

How do you choose the right adjustable bed?

Consider your specific needs (e.g., health conditions, mobility), size of the bed, weight capacity, mattress compatibility, features offered (like independent controls, massage or zero‑gravity mode), and your budget when choosing an adjustable bed.

Are adjustable beds worth the investment?

For many people, especially those with sleep, pain or mobility issues, adjustable beds offer health and comfort benefits that may justify the higher cost compared with a standard bed. However, they’re not essential for everyone and may exceed some budgets.

What special features do modern adjustable beds offer?

Many modern adjustable beds include features such as silent motors, multiple preset positions, massage functions, USB or app controls, split dual settings for couples, and zero‑gravity modes to enhance comfort and convenience.

References and Sources

Wikipedia – Adjustable Bed

National Council on Aging – Adjustable Beds vs. Standard Beds