Recruiting

Seating Conditions

Sponsor:

University of Miami

Code:

NCT07699848

Conditions

Electromyography

Pressure Injury of Back

Eligibility Criteria

Sex: All

Age: 18 - 70

Healthy Volunteers: Accepted

Interventions

Chaircise

Chaircise + Dynamic Leg Exercise

Chaircise + Static Leg Exercise

Study Details

Brief summary:

The study will compare cognitive capacity, muscle utilization patterns, soft tissue seated pressure and caloric output during four seated conditions:

1. passive sitting in a regular chair;
2. passive sitting in an exercise chair;
3. sitting in the exercise chair during active dynamic exercise; and,
4. sitting in the chair during active static exercise.

Conditions

Electromyography

Pressure Injury of Back

Study ID

NCT07699848

Start date

Jun 23, 2026

Status verified date

Aug, 2026

Completion date

Sep 30, 2027

Anticipated

Primary completion date

Sep 30, 2027

Anticipated

Eligibility Criteria

Eligibility Criteria

Sex: All

Age: 18 - 70

Healthy Volunteers: Accepted

Inclusion Criteria:

  • Adult (18-70)

Exclusion Criteria:

  • Any current injury in the lower limb or trunk.
  • Use of prescription drugs or supplements that may affect cardiovascular or neuromuscular responses.
  • Reported lack of sleep or stress that may affect physiological responses to exercise.
  • Cardiovascular, respiratory, neurologic, balance, metabolic, or musculoskeletal conditions that could increase risk during exercise testing

Study Design

Enrollment

35 participants

Anticipated

Allocation

Randomized

Intervention Model

Parallel Assignment

Primary purpose

Basic Science

Interventions and Outcome Measures

Arms

no intervention: Passive Comparator: Traditional Chair

Participant will sit in the traditional chair for the amount of time it takes them to read a scientific article.

placebo comparator: Passive Comparator: Exercise Chair

Participant will sit in the exercise chair for the amount of time it takes them to read a scientific article.

experimental: Experimental: Dynamic Leg Exercise in Exercise Chair

Participant will sit in the exercise chair for the amount of time it takes them to read a scientific article while actively pushing down and releasing the foot operated lever as many times as possible.

experimental: Experimental: Static Leg Exercise in Exercise Chair

Participant will sit in the exercise chair for the amount of time it takes them to read a scientific article while actively pushing down and holding the foot operated lever.

Interventions

Chaircise

A chair-based exercise program using a specialized chair that allows participants to lift their body weight.

Chaircise + Dynamic Leg Exercise

A chair-based exercise program performed using a specialized exercise chair equipped with a foot-operated lever. Participants repeatedly depress and release the foot-operated lever during the intervention period.

Chaircise + Static Leg Exercise

A chair-based exercise program performed using a specialized exercise chair equipped with a foot-operated lever. Participants depress and maintain pressure on the foot-operated lever during the intervention period.

Primary outcome measure

  • Differences in cognitive performance among chair conditions as measured by the Psychomotor Vigilance Test in number of key depressions [ Time Frame: Approximately 3 minutes ]
  • Executive function among chair conditions as measured by the Stroop Test using words counted. [ Time Frame: Approximately 5 minutes. ]
  • Executive function among chair conditions as measured by the Stroop Test using error rate. [ Time Frame: Approximately 5 minutes. ]
  • Muscle activity among chair conditions using electromyography [ Time Frame: Approximately 45 minutes ]
  • Peak seated tissue pressure among chair conditions using a pressure sensitive mat [ Time Frame: Approximately 15 minutes ]
  • Metabolic cost of sitting among the chair conditions using a portable oxygen consumption unit [ Time Frame: Approximately 25 minutes ]

Central Contacts and Locations

Central contacts

Joseph Signorile J Joseph Signorile, PhD

3058981458jsignorile@miami.edu

Ethan J Elkins, MS

3052844173exe453@miami.edu

Locations

Laboratory of Neuromuscular Research and Active Aging

Recruiting

Coral Gables, Florida, United States, 33146

Contacts

Joseph Signorile Joseph Signorile, PhD

305-898-1458jsignorile@miami.edu

Ethan J Elkins, MS

3052844173exe453@miami.edu

More Information

Sponsor

University of Miami

Last update posted

Aug 20, 2026

Last verified

Aug, 2026

Trial information was received from ClinicalTrials.gov and was last updated on 2026-09-09. This information was provided to ClinicalTrials.gov by University of Miami on 2026-08-20.