Study on Muscle Nerves and Exercise Responses

This study is looking at how special nerves in your muscles, called Group III/IV afferents, affect your breathing and body temperature when you exercise. These nerves send signals to your brain about what your muscles are doing. Researchers want to see if blocking these signals with a drug during cycling exercise changes how your airways respond and how much you sweat and your skin blood flow. They will measure these responses after two weeks. You can join if you are between 18 and 40 years old, physically active, and meet certain fitness levels. You cannot participate if you smoke, have asthma, diabetes, or certain other health conditions. The study aims to understand how these muscle nerves help your body handle the demands of exercise.

Study design
This is an interventional study planning to enroll 15 participants. It involves exercise training with or without a medication that blocks Group III/IV afferent feedback.
What's involved
Not specified in the trial record.
Compensation
Not stated in the trial record.
Follow-up
Your airway resistance, sweat rate, and skin blood flow will be measured at 2 weeks.

AI-generated from the public study record. Only the study team can confirm whether you're eligible — confirm details with them before making decisions.

NCT07452094

What is the Role of Type III/IV Muscle Afferents in Airway Resistance and Thermoregulatory Responses to Exercise?

Not Yet Recruiting
EARLY_PHASE1Ages 18–40InterventionalBasic science
Northern Arizona University
~15 participants
Updated 2026-03-05 on ClinicalTrials.gov
What's tested:EXERCISE TRAINING WITH OR WITHOUT MEDICATION

At a glance

Recruiting sites
0 of 1 listed site is recruiting right now
RecruitingSuspended, closed, or not yet open
What they're measuring
Airway resistance
Measured over 2 weeks
+2 more outcomes measured
Placebo - Control
Experimental

NCT07452094

Where you'd take part

This study runs at 1 site. They're the same protocol — you choose where, and that choice sets who your contact draft is addressed to.

  • Northern Arizona University

    Flagstaff, Arizonastudy coordinator listed

Sites open and close at different times, so the status above is per site — it can differ from the study's overall status.

  • TRAVIS D GIBBONS, PhD · PRINCIPAL_INVESTIGATOR · Northern Arizona University

Opens a ready-to-send draft in your own email app — review before sending.

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Eligibility criteria

Inclusion

regularly physically active as determined via questionnaires (Par-Q \& You)
maximal aerobic power 30 mL/min/kg (female), 40 mL/kg/min (male)

Exclusion

current smokers
acute bronchial asthma
diabetics
chronic back pain
peripheral neuropathy
chronic obstructive airway or status asthmaticus
obese (body mass index \> 30 kg/m2)
convulsive disorders
requiring daily medications that may affect responses to exercise (e.g. anti-hypertensive, anti-arrhythmogenics, blood thinners)
history of drug abuse
history of disease/dysfunction that could cause complication with exercise (e.g. cardiovascular, respiratory, neurological, musculoskeletal)
irregular or absent menstrual cycle
pregnant or suspected pregnancy
adverse response to physical exercise
current or history of esophageal or gastric disease, or frequent heart burn (\>2x per week)
Lidocaine allergy
  • Airway resistance2 weeks

    Calculated based of work of breathing and ventilation flow rate

  • Sweat rate2 weeks

    Local eccrine sweat rates at 3 different sites

  • Skin blood flow2 weeks

    Skin blood flux measured at different skin sites