Study to Warm Up and Cool Down Recreationally Active Males Using Different Protocols.

NCT ID: NCT06874023

Last Updated: 2025-03-13

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 10 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2020-09-14
• Study Completion Date: 2020-10-23

Brief Summary

The objective of this study was to examine the impact of four single-bout heating and cooling strategies on warming up and cooling down core body temperature. Heating strategies included: Passive heating in a hot environment (60 min), Active heating (30 min) + passive heating (30 min) in a hot environment, Active heating(60 min) in a hot environment, and Active heating (60 min) at room temperature. Cooling strategies to reduce body core temperature to baseline included: Cool vest (18°C) , Damp neck towel (24°C) combined with arm (i.e. hand, forearm and half of upper arm) cool water immersion (15°C), Combination of both, A control with participant sitting in a thermoneutral room (20°C air temperature) without any additional cooling intervention.

Detailed Description

This semi-randomized crossover control trial was performed between September and October 2020. Data collection took place over the course of 5-weeks with 10 subjects, with one data collection session with all subjects per week (hence, 40 trials total). Baseline gastrointestinal temperature (Tgi) was recorded, and the final Tgi at the end of the heating intervention (Part I), was used as the starting temperature for the current study (Part II).

Part I focused on assessing the efficacy of different heating strategies (Passive heating in a hot environment (60 min), Active heating (30 min) + passive heating (30 min) in a hot environment, Active heating(60 min) in a hot environment, and Active heating (60 min) at room temperature), aiming to reach a core temperature of 38.5°C during a 60-minute period.

Part II focused on cooling the body to a pre-exercise baseline core temperature. Cooling strategies consisted of: 1) Cool vest (18°C) with 500 mL (16 fl oz) ice water consumption, 2) Damp neck towel (24°C) combined with arm (i.e. hand, forearm and half of upper arm) cool water immersion (15°C) and 500 mL (16 fl oz) ice water consumption 3) Combination of cool vest (18°C), damp neck towel (24°C) with arm cool water immersion (15°C), and 500 mL (16 fl oz) ice water consumption or 4) A control with participant sitting in a thermoneutral room (20°C air temperature) without any additional cooling intervention. Thermoneutral water was consumed ad libitum for all interventions in addition to the 500 mL (16 fl oz) ice water consumption for experimental trials (#1-3).

Conditions

Heat Acclimation and Thermotolerance

Study Design

• Allocation Method: NA
• Intervention Model: SEQUENTIAL
• Primary Study Purpose: OTHER
• Blinding Strategy: NONE

Study Groups

Healthy young men exposed to heating and cooling protocols

All participants underwent four times a heating protocol separated by at least one week, and during these days after undergoing the heating protocol they also participated in a protocol aiming to cool down their body temperature. Each of the four heating and cooling interventions are described as interventions.

Group Type: OTHER

Passive heating in hot conditions

Intervention Type: OTHER

Participants performed seated passive heating in 54C conditions

Active heating + passive heating in hot conditions

Intervention Type: OTHER

Participants performed 30 minutes of biking exercise in 43C + 30 min of passive seated heating in 54C conditions.

Active heating in hot conditions

Intervention Type: OTHER

Participants performed 60 minutes of biking exercise in 43C.

Active heating at room temperature

Intervention Type: OTHER

Participants performed active heating through biking exercise for 60 minutes at room temperature.

Cool vest

Intervention Type: OTHER

Cool vest (18°C) with 500 mL (16 fl oz) ice water consumption

Damp neck towel combined with arm cool water immersion

Intervention Type: OTHER

Damp neck towel (24°C) combined with arm (i.e. hand, forearm and half of upper arm) cool water immersion (15°C) and 500 mL (16 fl oz) ice water consumption

Combination of cooling interventions

Intervention Type: OTHER

Combination of cool vest (18°C), damp neck towel (24°C) with arm cool water immersion (15°C), and 500 mL (16 fl oz) ice water consumption

Control in thermoneutral room without cooling

Intervention Type: OTHER

A control with participant sitting in a thermoneutral room (20°C air temperature) without any additional cooling intervention.

Interventions

Passive heating in hot conditions

Participants performed seated passive heating in 54C conditions

Intervention Type: OTHER

Active heating + passive heating in hot conditions

Participants performed 30 minutes of biking exercise in 43C + 30 min of passive seated heating in 54C conditions.

Intervention Type: OTHER

Active heating in hot conditions

Participants performed 60 minutes of biking exercise in 43C.

Intervention Type: OTHER

Active heating at room temperature

Participants performed active heating through biking exercise for 60 minutes at room temperature.

Intervention Type: OTHER

Cool vest

Cool vest (18°C) with 500 mL (16 fl oz) ice water consumption

Intervention Type: OTHER

Damp neck towel combined with arm cool water immersion

Damp neck towel (24°C) combined with arm (i.e. hand, forearm and half of upper arm) cool water immersion (15°C) and 500 mL (16 fl oz) ice water consumption

Intervention Type: OTHER

Combination of cooling interventions

Combination of cool vest (18°C), damp neck towel (24°C) with arm cool water immersion (15°C), and 500 mL (16 fl oz) ice water consumption

Intervention Type: OTHER

Control in thermoneutral room without cooling

A control with participant sitting in a thermoneutral room (20°C air temperature) without any additional cooling intervention.

Intervention Type: OTHER

Eligibility Criteria

Inclusion Criteria

• self-reported healthy
• non-smoking
• uninjured
• active (training five to ten hours per week)

Exclusion Criteria

• Participants were screened for fitness using the Physical Activity Readiness Questionnaire (PAR-Q): scoring one or more items as a yes.
• Contraindications to use a body core temperature sensor capsule.

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 30 Years
• Eligible Sex: MALE
• Accepts Healthy Volunteers: No

Sponsors

Arizona State University

OTHER

Sponsor Role: lead

Responsible Party

Floris Wardenaar

Assistant Professor

Responsibility Role: PRINCIPAL_INVESTIGATOR

Locations

Community Services Building

Tempe, Arizona, United States

Countries

United States

Other Identifiers

STUDY00015072

Identifier Type: -

Identifier Source: org_study_id