Short or Long High Intensity Training

NCT04075929 | Completed

• 1 other identifier: Aerobic short og long interval
• Study Type: interventional
• Target: 22
• Locations: 1 country
• Sites: 1

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.

Conditions

Sports Performance; Cycling; Well-trained Athletes

Keywords

Cycling; endurance performance; intermittent exercise; maximal oxygen consumption; physiological adaptions; well-trained athletes

Outcome Measures

Primary Outcomes (1)

• Maximal oxygen uptake

  VO2max

  4 weeks

Secondary Outcomes (2)

• Functional threshold power

  4 weeks

• Peak power output

  4 weeks

Study Arms (3)

4x8 min

OTHER

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

4x(8x40/20s)

OTHER

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

4x(12x40/20s)

OTHER

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

Interventions

Training effects on aerobic output OTHER

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(8x40/20s); 4x8 min

Eligibility Criteria

• Age: 18 Years - 40 Years
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

• 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.

You may not qualify if:

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

Sponsors & Collaborators

• University of Agder: lead

Study Sites (1)

University of Agder

Kristiansand, 4630, Norway

Location

Study Officials

• Monica K. Torstveit, Professor

  Universitetet i Agder

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: SINGLE
• Who Masked: PARTICIPANT
• Purpose: OTHER
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Professor

Study Record Dates

• First Submitted: August 29, 2019
• First Posted: September 3, 2019
• Study Start: November 1, 2017
• Primary Completion: December 15, 2017
• Study Completion: December 20, 2017
• Last Updated: September 3, 2019

Record last verified: 2019-08

Data Sharing

• IPD Sharing: Will not share

Locations

NO (1)