Short or Long High Intensity Training

Not Applicable

Completed

• Conditions: Sports Performance; Well-trained Athletes; Cycling
• Interventions: Other: Training effects on aerobic output

• Registration Number: NCT04075929
• Lead Sponsor: 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.

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.

Study Timeline

• Study Start: 2017-11-01
• Primary Completion: 2017-12-15
• Study Completion: 2017-12-20
• Status Verified: 2019-08
• Study First Submitted: 2019-08-29
• Study First Submitted QC: 2019-08-30
• Last Update Submitted: 2019-08-30
• Study First Posted: 2019-09-03
• Last Update Posted: 2019-09-03

Recruitment & Eligibility

• Status: COMPLETED
• Sex: Male
• Target Recruitment: 22

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.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
4x8 min	Training effects on aerobic output	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
4x(8x40/20s)	Training effects on aerobic output	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
4x(12x40/20s)	Training effects on aerobic output	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

Primary Outcome Measures

Name	Time	Method
Maximal oxygen uptake	4 weeks	VO2max

Secondary Outcome Measures

Name	Time	Method
Functional threshold power	4 weeks	FTP
Peak power output	4 weeks	PPO

Trial Locations

Locations (1)

University of Agder; 🇳🇴 Kristiansand, Norway