Clinical trial NCT05936398: Influence of Respiratory Muscle Training on Objective and Subjective Training Load Measures in Triathletes
Official title: Influence of Respiratory Muscle Training on Objective and Subjective Training Load Measures in Triathletes
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Athletic Performance
Lead sponsor: Institute of Sport - National Research Institute, Poland
Sponsor class: OTHER
First posted: 2023-07-07
Enrollment: 16
Sex: ALL
Minimum age (years): 18
Maximum age (years): 40
Standard ages: ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: OTHER

Brief summary: Two groups of healthy, highly trained triathletes trained respiratory muscles with one of the two methods: voluntary isocapnic hyperpnoea (VIH) or inspiratory pressure threshold loading (IPTL). The main purpose of this study was to accurately and thoroughly assess the potential extra load that RMT puts on athletes and determine if there are significant differences in RMT-induced load between the investigated training methods.

Informed written consent was obtained from the all study participants. All procedures were carried out in accordance with the Declaration of Helsinki.

Detailed description: The study was conducted as a randomized controlled trial with two parallel groups. Whereas participants and data collectors were aware of the allocated training method, the data analysts and laboratory technicians performing biochemistry assays were kept blinded to the allocation. The participants were assigned at random to either VIH or IPTL training group to perform RMT with progressive overload for 6 weeks.

Three training sessions (week 1, 4, 6) were monitor to assess the potential extra load that RMT puts on athletes and determine if there are significant differences in RMT-induced load between the investigated training methods.

Blood samples used for acid-base balance (pH), partial pressure of oxygen (pO2), partial pressure for carbon dioxide (pCO2), partial pressure for bicarbonate ion (HCO3-), and blood lactate (bLa) were collected immediately after cessation of the exercise and MPQ was presented 1' after cessation of the exercise. Blood samples for cortisol (C) and testosterone (T) were collected 5' after cessation of the exercise. The second S-Index Test was performed between minute 5 and minute 7 after cessation of the exercise. RPE was assessed 10' after cessation of the exercise. The participants again answered MPQ after 24h and 48h after the monitored RMT sessions.

Informed written consent was obtained from the all study participants. All procedures were carried out in accordance with the Declaration of Helsinki.

Eligibility criteria: Inclusion Criteria:

* valid medical certificate to compete sports professionally,
* lack of ongoing medication intake,
* lack of any medical condition,
* lack of previous experience with RMT,
* lack of previous experience with RMT,
* performance caliber corresponding to at HighlyTrained/Elite (Participant Classification Framework, McKay 2022),
* at least 6 years of triathlon training,
* average training volume over 12 hours per week during last 6 weeks.

Exclusion Criteria:

* any ongoing medication intake or medical condition.

Primary outcomes:
measure: Changes in measured blood indices to assess the potential extra load that RMT puts on athletes and determine if there are significant differences in RMT-induced load between the investigated training methods (pH)
timeFrame: Week 1, 4 and 6 after monitored RMT sessions.
measure: Changes in measured blood indices to assess the potential extra load that RMT puts on athletes and determine if there are significant differences in RMT-induced load between the investigated training methods (pO2).
timeFrame: Week 1, 4 and 6 after monitored RMT sessions.
measure: Changes in measured blood indices to assess the potential extra load that RMT puts on athletes and determine if there are significant differences in RMT-induced load between the investigated training methods (pCO2).
timeFrame: Week 1, 4 and 6 after monitored RMT sessions.
measure: Changes in measured blood indices to assess the potential extra load that RMT puts on athletes and determine if there are significant differences in RMT-induced load between the investigated training methods (CHO3).
timeFrame: Week 1, 4 and 6 after monitored RMT sessions.
measure: Changes in measured blood indices to assess the potential extra load that RMT puts on athletes and determine if there are significant differences in RMT-induced load between the investigated training methods (lactate).
timeFrame: Week 1, 4 and 6 after monitored RMT sessions.
measure: Changes in measured blood indices to assess the potential extra load that RMT puts on athletes and determine if there are significant differences in RMT-induced load between the investigated training methods (testosterone).
timeFrame: Week 1, 4 and 6 after monitored RMT sessions.
measure: Changes in measured blood indices to assess the potential extra load that RMT puts on athletes and determine if there are significant differences in RMT-induced load between the investigated training methods (cortisol).
timeFrame: Week 1, 4 and 6 after monitored RMT sessions.
measure: Changes in cardiac indices to assess the potential extra load that RMT puts on athletes and determine if there are significant differences in RMT-induced load between the investigated training methods.
timeFrame: Week 1, 4 and 6 after monitored RMT sessions.
measure: Collecting subjective measures to assess the potential extra load that RMT puts on athletes and determine if there are significant differences in RMT-induced load between the investigated training methods (RPE)
timeFrame: Week 1, 4 and 6 after monitored RMT sessions.
measure: Collecting subjective measures to assess the potential extra load that RMT puts on athletes and determine if there are significant differences in RMT-induced load between the investigated training methods (MPQ).
timeFrame: Week 1, 4 and 6 after monitored RMT sessions.
measure: Collecting local blood oxygenation during RMT to assess the potential extra load that RMT puts on athletes and determine if there are significant differences in RMT-induced load between the investigated training methods.
timeFrame: Week 1, 4 and 6 after monitored RMT sessions.
Secondary outcomes:
Other outcomes:
Locations:
city: Warsaw
country: Poland
facility: Institute of Sport - National Research Institute
Study officials:
References: