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

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.

Conditions

• Heat Acclimation and Thermotolerance

Interventions

OTHER

Passive heating in hot conditions

Participants performed seated passive heating in 54C conditions

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.

OTHER

Active heating in hot conditions

Participants performed 60 minutes of biking exercise in 43C.

OTHER

Active heating at room temperature

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

OTHER

Cool vest

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

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

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

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.

Sponsors & Collaborators

• Arizona State University

  lead OTHER

Study Design

Allocation

NA

Purpose

OTHER

Masking

NONE

Model

SEQUENTIAL

Eligibility

Min Age

18 Years

Max Age

30 Years

Sex

MALE

Healthy Volunteers

No

Timeline & Regulatory

Start

2020-09-14

Primary Completion

2020-10-23

Completion

2020-10-23

Countries

• United States

Study Locations