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Inspiratory Muscle Training in Amateur CrossFit® Athletes
Sponsor: Federal University of the Valleys of Jequitinhonha and Mucuri
Summary
The aim of this randomized controlled trial is to investigate the effectiveness of inspiratory muscle training (IMT) on the performance of athletes in CrossFit® activities, respiratory muscle strength, and perceived post-training fatigue. This study follows a two-arm randomized controlled trial protocol. Ninety-four volunteers aged between 18 and 60 years, enrolled in CrossFit® training, will be randomly allocated to the IMT Group, which involves respiratory training using a linear load device (Powerbreathe®) in conjunction with CrossFit® training; or the Non-IMT Group, which undergoes the same training as the intervention group but uses a device without a valve that ensures resistance. The primary outcome is to investigate the effectiveness of IMT: on maximum inspiratory pressure and maximum expiratory pressure. The secondary outcomes include performance in the six-minute walk test, Pistol, Burpee, Sit-up, Box Jump, Thruster, and Single-Under, burning 25 calories on the "Air Bike" measured by the time taken to reach the 25-calorie mark on this equipment, as well as the assessment of subjective fatigue perception. All outcomes of interest will be collected at baseline and reassessed: mid-term (8 weeks after allocation); and long-term (12 weeks after allocation), the IMT and MEP will be reassessed. Analyses will follow the intention-to-treat principle. Treatment effects will be assessed using Linear Mixed Models. The results of this study may help clarify the effects of IMT on CrossFit® athletes.
Official title: Effectiveness of Inspiratory Muscle Training on Respiratory Muscle Strength and Physical Performance in Amateur CrossFit® Athletes: A Randomized Controlled Trial
Key Details
Gender
All
Age Range
18 Years - 60 Years
Study Type
INTERVENTIONAL
Enrollment
94
Start Date
2026-01
Completion Date
2027-03-30
Last Updated
2026-01-27
Healthy Volunteers
Yes
Conditions
Interventions
Group with IMT
Group with IMT + CrossFit training
CrossFit® Training
The training routine will occur seven days a week, with participants encouraged and motivated to attend at least five training sessions. CrossFit® classes will include: warm-up exercises, strength training (with a focus on Olympic weightlifting and free weights), strength endurance (body weight and external loads), aerobic capacity (across multiple domains), maximal aerobic power (across multiple domains), anaerobic capacity (across multiple domains), cool-down activities, and mobility exercises. Each training session will be designed and supervised by a team of certified physical educators.
Locations (1)
Academia Compasso - Kapura
Sete Lagoas, Minas Gerais, Brazil