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Conducting Maximal and Submaximal Endurance Exercise Testing to Measure Physiological and Biological Responses to Acute Exercise in Humans
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Fan Cooling Improves Submaximal Exercise Capacity in an Indoor Thermoneutral Environment.

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Fan cooling during moderate-vigorous indoor cycling increases work capacity and energy expenditure without increasing perceived exertion. This method enhances the effectiveness of heart rate-based training sessions.

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Area of Science:

  • Exercise Physiology
  • Environmental Ergonomics

Background:

  • Indoor cycling is a popular exercise modality.
  • Optimizing training intensity and energy expenditure is crucial for fitness.
  • Environmental factors like heat can influence physiological responses during exercise.

Purpose of the Study:

  • To compare physiological and perceptual responses to moderate-vigorous intensity, heart rate-based cycle ergometry with and without fan cooling.
  • To determine if fan cooling affects work capacity, energy expenditure, and perceived exertion during indoor cycling.

Main Methods:

  • Sixteen recreationally active adults completed two 40-minute cycle ergometry sessions at 70% heart rate reserve, with and without a fan.
  • Workload, oxygen cost, respiratory exchange ratio, rating of perceived exertion (RPE), thermal sensation, blood lactate, and body mass were monitored.
  • Workload was continuously adjusted to maintain target heart rate.

Main Results:

  • Fan cooling significantly increased mean workload (+15%) and oxygen consumption (+9%), leading to greater energy expenditure (344 vs. 302 kcals).
  • Thermal sensation was significantly lower with fan cooling, while RPE was not significantly different.
  • Body mass loss was attenuated with fan cooling, and blood lactate levels were higher in the fan condition.

Conclusions:

  • Fan cooling enhances work capacity and energy expenditure during submaximal, moderate-vigorous intensity cycle ergometry.
  • It improves thermal comfort without increasing perceived exertion.
  • Fan cooling is a valuable tool for increasing the effectiveness of indoor, heart rate-based cycle training.