"Living Low - Training High" Methods and Physiological Responses in Well-trained Swimmers

NCT06253039 | Not Yet Recruiting

• 1 other identifier: RSH swimmers
• Study Type: interventional
• Target: 36
• Locations: 1 country
• Sites: 1

Brief Summary

To overcome the lack of knowledge regarding the impact of different "living low, training high" methods on swimming performance, a 4-week intervention will be carried out to determine and compare the effects of three Repeated Sprints in Hypoxia (RSH) methods with each other and with a control group. Our goal is to characterize and compare the adaptations in swimming performance and in cardiorespiratory, metabolic, and muscle oxygenation responses that can arise after a 4-week training period of RSH and RSH-voluntary hypoventilation (VHL) performed in a ski-ergometer.

Conditions

Normobaric Hypoxia; Hypoventilation; Normoxia

Keywords

Repeated sprint methods; Swimming performance; Training programs; V̇̇O2peak; Lactate concentration; Energetic systems; Oxygen uptake kinetics; Deoxygenation kinetics

Outcome Measures

Primary Outcomes (4)

• Ventilatory thresholds and maximum oxygen consumption

  mL/kg·min

  Before and after 4 weeks of supervised training period

• Lactate concentration

  mmol.L-1

  Before and after 4 weeks of supervised training period

• Muscle oximetry

  Near-infrared spectroscopy (NIRS)

  Before and after 4 weeks of supervised training period

• Time-trial

  seconds

  Before and after 4 weeks of supervised training period

Secondary Outcomes (2)

• Heart rate

  Before and after 4 weeks of supervised training period

• Arterial oxygen saturation

  Before and after 4 weeks of supervised training period

Study Arms (3)

Normobaric hypoxia (RSH)

EXPERIMENTAL

The RSH group will perform training sessions in a normobaric hypoxic chamber at a simulated altitude of 3000 meters (FiO2 14.5%)

Other: Repeated sprint

Hypoventilation (RSH-VHL)

EXPERIMENTAL

RSH-VHL group will be asked to exhale down to functional residual capacity just before each repetition and then hold their breath until the end of the sprint

Other: Repeated sprint

Normoxia (RSN)

ACTIVE COMPARATOR

The control group will perform the training sessions in normoxia (FIO2, 20.9%)

Other: Repeated sprint

Interventions

Repeated sprint OTHER

* The group will endure four weeks (8 sessions) of the assigned training program in addition to the regular swimming training. * Data collection sessions: All groups will be evaluated before and after the supervised training period in three testing sessions in normoxia separated by at least 24 hours within 7 days. * Training sessions: will be performed in the ski ergometer and consist of 4 sets of 5x6s all-out sprints with 24s and 5 min of passive rest between the sprints and sets, respectively.

Hypoventilation (RSH-VHL); Normobaric hypoxia (RSH); Normoxia (RSN)

Eligibility Criteria

• Age: 18 Years - 30 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

• Swimmers from both sexes;
• With regular participation in National Championships;
• More than five years of training experience;
• No recent exposure/acclimatization to altitude;
• No recent exposition to Blood Flow Restriction training.

You may not qualify if:

• athletes who had an acclimatization experience or exposure to altitude lasting more than 10 days in the last 6 months;
• pregnant or postpartum women;

Sponsors & Collaborators

• Faculdade de Motricidade Humana: lead
• Centro de Alto Rendimento do Jamor: collaborator

Study Sites (1)

Faculty of Human Kinetics

Lisbon, Cruz-Quebrada, 1495-002, Portugal

Location

MeSH Terms

Conditions

Hypoventilation

Condition Hierarchy (Ancestors)

Respiratory Insufficiency; Respiration Disorders; Respiratory Tract Diseases; Signs and Symptoms, Respiratory; Signs and Symptoms; Pathological Conditions, Signs and Symptoms

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: NONE
• Purpose: OTHER
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: December 21, 2023
• First Posted: February 12, 2024
• Study Start: February 1, 2024
• Primary Completion: April 1, 2024
• Study Completion: June 1, 2024
• Last Updated: February 12, 2024

Record last verified: 2024-02

Data Sharing

• IPD Sharing: Will not share

Locations

PT (1)