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Short or Long High Intensity Training

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ClinicalTrials.gov Identifier: NCT04075929
Recruitment Status : Completed
First Posted : September 3, 2019
Last Update Posted : September 3, 2019
Sponsor:
Information provided by (Responsible Party):
Monica Klungland Torstveit, University of Agder

Brief Summary:
To compare the effects of short and long high intensity interval training (HIT) conducted with the same total accumulated duration on physiological- and performance parameters during a 4-week training period.

Condition or disease Intervention/treatment Phase
Sports Performance Cycling Well-trained Athletes Other: Training effects on aerobic output Not Applicable

Detailed Description:

Studies among elite athletes have documented the importance of large amounts of training volume in order to perform at a high level in endurance sports. It is also well documented that both low intensity training (LIT), moderate intensity training (MIT) and high intensity training (HIT) should be included in the overall training efforts. It is well documented that HIT has a positive effect on the aerobic endurance among both elite athletes and recreational athletes.

Despite the fact that there is general agreement that HIT is an important part of the overall training, it is unclear how this part of the training should be organized in order to optimize the training effects. The adaptions of endurance performance seem to depend on both the intensity and the accumulated duration of the HIT sessions. Therefore, the aim of this study was to compare the effects of SI and LI training, including equal accumulated HIT duration, during a 4-week intervention period, conducted as 4x8-min with 2-min recovery periods, 4x(12x40/20-sec) with 2-min recovery periods and 4x(8x40/20-sec) with 2-min recovery periods, in different physiological- and performance parameters among well-trained cyclists.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 22 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single (Participant)
Primary Purpose: Other
Official Title: Aerobic Short or Long High Intensity Interval Training - Does it Matter
Actual Study Start Date : November 1, 2017
Actual Primary Completion Date : December 15, 2017
Actual Study Completion Date : December 20, 2017

Arm Intervention/treatment
4x8 min
4x8-min intervals with 2-min recovery periods. The same accumulated duration of these three interval groups means that the total interval time is the same for each group: 4x8-min = 32 min
Other: Training effects on aerobic output
The cyclists were allowed to perform ad libitum low intensity (LIT) in addition to high intensity (HIT) sessions that were determined to each group. The cyclists completed 12 supervised HIT sessions during the intervention period, three HIT sessions per week with at least 48 hours between each HIT-session. All HIT sessions were performed as supervised group training sessions. Each HIT session started with an individual 30 minutes' warm up at low intensity (55-70% HRmax) interspersed by freely chosen progressive sprints. For all groups the power output during the recovery periods was 50 % of the power output used during work intervals. The cyclists in all groups were instructed to perform each interval session at their maximal sustainable intensity. Each session ended with 15-20 minutes' cool down (55-70% HRmax). All HIT sessions were supervised and performed in groups on the University of Agder's (UiA) premises at Spicheren fitness center in Kristiansand.

4x(8x40/20s)
4x(12x40/20-sec) intervals with 2-min recovery periods The same accumulated duration of these three interval groups means that the total interval time is the same for each group:4x(12x40/20-sec) = 32 min if the 20-sec recovery is not included in the total time of HIT
Other: Training effects on aerobic output
The cyclists were allowed to perform ad libitum low intensity (LIT) in addition to high intensity (HIT) sessions that were determined to each group. The cyclists completed 12 supervised HIT sessions during the intervention period, three HIT sessions per week with at least 48 hours between each HIT-session. All HIT sessions were performed as supervised group training sessions. Each HIT session started with an individual 30 minutes' warm up at low intensity (55-70% HRmax) interspersed by freely chosen progressive sprints. For all groups the power output during the recovery periods was 50 % of the power output used during work intervals. The cyclists in all groups were instructed to perform each interval session at their maximal sustainable intensity. Each session ended with 15-20 minutes' cool down (55-70% HRmax). All HIT sessions were supervised and performed in groups on the University of Agder's (UiA) premises at Spicheren fitness center in Kristiansand.

4x(12x40/20s)
4x(8x40/20-sec) intervals with 2-min recovery periods The same accumulated duration of these three interval groups means that the total interval time is the same for each group: 4x(8x40/20-sec) = 32 min if the 20-sec recovery is included in the total time of HIT
Other: Training effects on aerobic output
The cyclists were allowed to perform ad libitum low intensity (LIT) in addition to high intensity (HIT) sessions that were determined to each group. The cyclists completed 12 supervised HIT sessions during the intervention period, three HIT sessions per week with at least 48 hours between each HIT-session. All HIT sessions were performed as supervised group training sessions. Each HIT session started with an individual 30 minutes' warm up at low intensity (55-70% HRmax) interspersed by freely chosen progressive sprints. For all groups the power output during the recovery periods was 50 % of the power output used during work intervals. The cyclists in all groups were instructed to perform each interval session at their maximal sustainable intensity. Each session ended with 15-20 minutes' cool down (55-70% HRmax). All HIT sessions were supervised and performed in groups on the University of Agder's (UiA) premises at Spicheren fitness center in Kristiansand.




Primary Outcome Measures :
  1. Maximal oxygen uptake [ Time Frame: 4 weeks ]
    VO2max


Secondary Outcome Measures :
  1. Functional threshold power [ Time Frame: 4 weeks ]
    FTP

  2. Peak power output [ Time Frame: 4 weeks ]
    PPO



Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 40 Years   (Adult)
Sexes Eligible for Study:   Male
Gender Based Eligibility:   Yes
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • male < 40 years,
  • peak oxygen uptake (VO2peak) > 55 ml.kg-1.min-1,
  • training volume >3 sessions per week (within cycling)
  • absence of disease and injuries.

Exclusion Criteria:

  • disease/injuries
  • frequent absence of HIT sessions during the period.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04075929


Locations
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Norway
University of Agder
Kristiansand, Norway, 4630
Sponsors and Collaborators
University of Agder
Investigators
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Principal Investigator: Monica K. Torstveit, Professor Universitetet i Agder
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Responsible Party: Monica Klungland Torstveit, Professor, University of Agder
ClinicalTrials.gov Identifier: NCT04075929    
Other Study ID Numbers: Aerobic short og long interval
First Posted: September 3, 2019    Key Record Dates
Last Update Posted: September 3, 2019
Last Verified: August 2019
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

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Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by Monica Klungland Torstveit, University of Agder:
Cycling
endurance performance
intermittent exercise
maximal oxygen consumption
physiological adaptions
well-trained athletes