The 10/7 HIIT Shock Cycle Study: Effectiveness of 10 HIIT Sessions in 7 Days (THESIS)

University of Salzburg

Status: Completed

Conditions: Performance; Athlete; Healthy

Treatments: Other: Exercise

Study type: Interventional

Funder types: Other

Identifiers

NCT05067426

NHaller

Details and patient eligibility

About

A randomized, controlled trial to evaluate the effects of two versions of 10 high intensity interval trainings (HIIT) within a 7-day shock microcycle on endurance performance, well-being, health, stress and recovery in trained athletes.

Full description

Thirty-six trained endurance athletes will be recruited and randomly assigned to either a "high volume (HIIT-HV)" group, a "low volume (HIIT-LV)" group, or a control group. All participants will be monitored before (9 days), during (7 days), and after (14 days) a 7-day training intervention, for 30 days. Participants in both intervention groups will complete 10 HIIT sessions within the period of 7 days, with an additional 30 minutes of low-intensity training exclusively in HIIT-HV. HIIT sessions consist of aerobic HIIT, i.e., 5x4min at 90-95% of maximal heart rate interspersed by 2.5 min active recovery periods. To determine the effects of the intervention, performance diagnostics, and a 5 kilometer time trial will be conducted before and after the intervention. In addition, participants are closely monitored for general health, stress, fatigue, recovery, neuromuscular performance, executive functions and sleep.

Enrollment: 33 patients

Sex: All

Ages: 18 to 45 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Female or male
• aged 18-45 years
• Proof of physical fitness (e.g. sports medical examination required) for measurements with higher intensities (e.g. endurance tests, competition simulation)
• Competition experience at the national or international level in an endurance sport
• VO2max ≥50ml/kg/min for females; ≥55 ml/kg/min for males or a 5-kilometer (km) time trial performance of ≤ 20:00 min (female), or ≤ 18:30 min (male)

Exclusion criteria

• Systemic disease or other known pathology in the organs: heart, lungs, kidney, stomach, spleen, liver, gall bladder, and intestines.
• Evidence of pulmonary disease: forced expiratory volume in one second/forced expiratory volume < 70% with/without symptoms (cough, sputum) or other evidence of pulmonologic disease.
• Diabetes II.
• Neurological or psychological disease of any kind.
• Currently undergoing medical or psycho-therapeutic treatment.
• Health condition that does not allow regular participation in the training forms (e.g. acute illnesses such as fever or other flu-like infections within the last 7 days before the start of the study), orthopedic diseases, injuries to the muscular, bone, joint or tendon apparatus within the last three months.
• Alcohol or drug abuse.
• Already high training volume with high intensity training (more than 2 weekly training sessions of high-intensity training)

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

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33 participants in 3 patient groups

HIIT-HV

Experimental group

Description:

HIIT-HV - high intensity interval training high volume Participants complete a total of 10 HIIT sessions over a 7-day period consisting of 5 x 4-minute intervals at an intensity of 90-95% of their individual maximum heart rate (HRmax), interspersed with a 2.5-minute active recovery period. Each training session is followed by 30 minutes of low-intensity training (total of 300 minutes of additional low-intensity training during this period).

Treatment:

Other: Exercise

HIIT-LV

Experimental group

Description:

HIIT- LV - high intensity interval training low volume Participants complete a total of 10 HIIT sessions over a 7-day period consisting of 5 x 4-minute intervals at an intensity of 90-95% of their individual maximum heart rate (HRmax), interspersed with a 2.5-minute active recovery period.

Treatment:

Other: Exercise

Control group

No Intervention group

Description:

Participants continue with their regular training program.