NCT04868136

Effects of a Warm-up on Immune Response to Exercise

The Effects of a Dynamic Warm up on the Immune Response to Exercise in Lower Fit and Higher Fit Adults

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 24 (actual)
• Sponsor: University of Houston · Academic / Other
• Sex: All
• Age: 18 Years – 40 Years
• Healthy volunteers: Accepted

Summary

This randomized cross-over study compares two identical cardiorespiratory exercise bouts, differing only in the inclusion or exclusion of a dynamic period of increasing exercise intensity prior to the exercise bout. Planned comparisons include physiological responses and perceived effort during exercise, leukocyte mobilization, and mood between the two exercise sessions.

Detailed description

Physically active adult men and women are asked to complete three study visits to the laboratory. On Visit 1, participants provide informed consent and are screened for study inclusion criteria: being between 18 and 40 years of age, a non-smoker, not pregnant, free of disease impacting exercise performance or immunity, and performing at least one hour per week of vigorous exercise training (any modality) for at least the prior six months. Participants also complete an incremental submaximal exercise test on a stationary bicycle. The results of this test are used to calculate the resistance corresponding to 80% of estimated maximal heart rate. Participants return within 2-14 days for Visits 2 and 3. These visits consist of 30 min of bicycling at this resistance. One visit included a 10 min dynamic warm-up prior to the exercise bout. Participants were stratified by sex and randomized such that half of the men and women completed the exercise trial with warm-up during Visit 2. Heart rate, perceived exertion, and wattage are recorded during each minute of the exercise bouts. Participants donate blood before, immediately after, and 1h after each exercise. Blood is analyzed by flow cytometry to characterize leukocyte subsets. After each exercise session, participants complete surveys assessing mood and affect. Physiological, immunological, and psychological parameters recorded will be compared within participants between the two experimental exercise sessions using appropriate statistical tests. p\<0.05 will be accepted as significant.

Conditions

• Physiological and Psychological Responses to Exercise

Interventions

Type	Name	Description
BEHAVIORAL	Exercise	30 minutes of exercise at 80% of maximum predicted heart rate performed on an indoor stationary bicycle. Exercise was preceded by 10 min of gradually increasing cycling intensity in one of two exercise trials

Timeline

• Start date: 2018-07-15
• Primary completion: 2020-02-01
• Completion: 2021-09-30
• First posted: 2021-04-30
• Last updated: 2022-05-17

Locations

1 site across 1 country: United States