The Effects of High vs. Low Time Spent Near VO2max During Two Work-matched High Intensity Interval Training.

University of the State of Santa Catarina

Status: Completed

Conditions: VO2max

Treatments: Other: Exercise training

Study type: Interventional

Funder types: Other

Identifiers

NCT05742542

VO2maxtrainingUDESantaCatarina

Details and patient eligibility

About

Maximal oxygen uptake (VO2max) is used to define cardiorespiratory fitness, which is important to health and sport performance in humans. Although different types of training can improve VO2max, the high intensity interval training is recognized as one of the best ways to do it. Furthermore, it has long been speculated that high intensity interval training that elicits a high time spent near VO2max could be the best way to improve VO2max. However, this theory has not been verified. Thus, the investigators performed a randomized controlled trial with crossover in healthy individuals who underwent two high intensity interval training protocols of two weeks, being a workout with longer and other with shorter time spent near VO2max.

Full description

Fifteen participants were enrolled in a randomized trial with crossover to perform two weeks of high intensity interval training with high (i.e., five times 2 minutes of work and 1 minute of recovery; T-2min:1min) or low (i.e., ten times 1 minutes of work and 30 seconds of recovery; T-1min:30seg) time spent near VO2max. The work intensity was adjusted at 85% and 87% of power output achieved at the end of incremental test for the first and second week, respectively. Before and after the T-2min:1min and T-1min:30seg, the participants performed tests to determine VO2max, lactate threshold, muscle oxidative capacity, pulmonary oxygen uptake kinetics, power output achieved at the end of incremental test, and power output related to Wingate anaerobic test. The training programs had a washout period of at least one month.

Enrollment: 15 patients

Sex: Male

Ages: 18+ years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Male ≥ 18 years;
• No known musculoskeletal disorders;
• Apparently healthy
• Physically active according to American College of Sports Medicine standards and recommendations (Garber et al., 2011; RIEBE et al., 2015).

Exclusion criteria

• Taking any medication that could affect aerobic parameters;
• Smokers;
• Involved in an aerobic training program at the start of the study.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Crossover Assignment

Masking: Single Blind

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15 participants in 2 patient groups

High intensity interval training with high time spent near VO2max

Experimental group

Description:

Participants performed high intensity interval training with high time spent near VO2max three times a week for two weeks. All training sessions consisted of five times 2 minutes of work and 1 minute of passive recovery. The work intensity was adjusted at 85% and 87% of power output achieved at the end of incremental test for the first and second week, respectively. The training sessions were performed using cycle ergometer. Findings were compared to high intensity interval training with low time spent near VO2max, which followed the same exercise frequency, intensity and total duration.

Treatment:

Other: Exercise training

High intensity interval training with low time spent near VO2max

Experimental group

Description:

Participants performed high intensity interval training with low time spent near VO2max three times a week for two weeks. All training sessions consisted of ten times 1 minutes of work and 30 seconds of passive recovery. The work intensity was adjusted at 85% and 87% of power output achieved at the end of incremental test for the first and second week, respectively. The training sessions were performed using cycle ergometer. Findings were compared to high intensity interval training with high time spent near VO2max, which followed the same exercise frequency, intensity and total duration.

Treatment:

Other: Exercise training