ThermoAge

Exploring how extreme indoor temperatures affect balance, mobility, and the risk of falling in older adults.

Thermal comfort research
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Project Overview

THERMOAGE explores how exposure to cold or heat extremes indoors can affect posture, muscle properties, and the risk of falling in older adults. With climate change increasing the frequency of extreme weather events, older people—who often spend 90% of their time indoors—face heightened vulnerability.

This pilot study will generate objective data on how indoor temperatures influence balance and mobility, aiming to inform building design, public health strategies, and financial policies to better protect aging populations.

Why It Matters

  • A Growing Concern

    Extreme weather events are becoming more common and prolonged, posing a health risk to older adults with reduced capacity to regulate body temperature.

  • Risk of Falls

    Falls in later life carry significant personal, clinical, and economic costs. Indoor temperature extremes can exacerbate muscle fatigue, affect balance, and ultimately increase the likelihood of falls.

  • Building & Policy Implications

    Current indoor temperature guidelines (e.g. recommended 18–21°C in winter) don't fully account for older adults' specific needs or regional climate variations. This project could help shape future building standards and energy policies that actively protect vulnerable residents.

Research Objectives

1. Quantify the Impact of Temperature on Balance

Measure changes in postural sway and muscle properties (e.g., stiffness, tone) at a range of indoor temperatures (14–30°C).

2. Identify Thresholds

Investigate possible critical indoor temperatures where balance and muscle responses become significantly impaired, leading to a higher fall risk.

3. Inform Stakeholders

Engage Leeds City Council and other stakeholders to highlight how building design, retrofitting, and heating/cooling policies could be optimized for older adults' safety.

Methodology

Participant Recruitment

Ten adults aged over 55 (5 female, 5 male) will participate in two experimental trials in a controlled climate chamber.

Climate Chamber Sessions

  • 25-minute acclimatization at a "baseline" 21°C.
  • Gradual ramp (0.17°C/min over 45 mins) to either a COLD condition (14°C) or a HOT condition (30°C).

Data Collection

  • Body Temperature: Skin thermocouples record local temperatures at six body locations.
  • Balance & Postural Sway: A plantar pressure plate tracks micro-movements while participants are seated or standing.
  • Muscle Properties: MyotonPRO device measures stiffness and tone of key lower-limb muscles.
  • Thermal Comfort Surveys: Participants periodically report subjective thermal comfort, sensation, and preference.

Data Analysis

Changes in postural sway, muscle function, and body temperature will be compared across both temperature extremes. These insights will help identify potential "tipping points" where increased fall risk may occur.

Project Timeline

1

May 2025

Project start, preparation of equipment and recruitment

2

May–September 2025

Data collection in climate chamber

3

July–October 2025

Data analysis & stakeholder feedback sessions

4

31 October 2025

Project completion and final report

Collaboration & Impact

By connecting scientific research to local policy (Leeds City Council's core priorities), the project aims to shape proactive building guidelines and reduce hospital admissions due to falls.

Findings will inform larger studies (e.g., NERC grants) on healthy aging and indoor environments, potentially influencing national regulations and energy-efficient housing solutions.

Budget & Value for Money

Total Requested: £3,000

  • Research Assistant – ~50 hours of undergraduate support via JobLink for data collection and analysis (£900).
  • Participant Costs – Travel and incentives for 10 older adult participants, each attending two sessions (£1,540).
  • Consumables – Data loggers, thermocouples, and minor equipment upkeep (£560).

This modest budget delivers substantial returns by leveraging existing climate chamber facilities, in-kind academic expertise, and external partnerships with Leeds City Council. It also promotes EDI by enabling participation from outside the University community, covering travel expenses, and fairly compensating volunteers' time.

Research Team

Principal Investigator

SC
Dr. Silvia Caggiari

Early Career Researcher

School of Biomedical Sciences, University of Leeds

Co-Investigators

SS
Dr. Sally Shahzad

School of Civil Engineering, University of Leeds

SA
Prof. Sarah Astill

School of Biomedical Sciences, University of Leeds

DL
Dr. David Lunn

School of Sport, Leeds Beckett University

HL
Helen Laird

Head of Public Health (Older People), Leeds City Council

CM
Colin Moss

Head of Health and Housing, Leeds City Council

Key Facts

Project Duration

May - October 2025

Participants

10 adults aged over 55

Temperature Range

14°C to 30°C

Budget

£3,000

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