Physiologic Adaptations to Interval and Continuous Running at Low Volume and Vigorous Intensity Over 14-Weeks.

University of Trás-os-Montes and Alto Douro

Status: Completed

Conditions: Exhaustion - Physiological

Treatments: Other: running training

Study type: Interventional

Funder types: Other

Identifiers

NCT01816451

UFRJ-2010

Details and patient eligibility

About

The purpose of this study was to verify physiological responses to constant-load (continuous) vs. variable-intensity (interval) during 14 weeks of aerobic exercise on active men. The hypothesis was that would be differences in physiological variables on distinct modes of execution performed on the treadmill over a period of 14 weeks of training.

Full description

Initially there were thirty five subjects, but due factors outside the present study, three individuals were excluded from the program. Two individuals during maximal exercise test (VO2) showed clinical impairment test being interrupted by the doctor and the third individual presented a plantar fasciitis in the early familiarization. Thirty two healthy and active males volunteered to participate in the study. All subjects exercised habitually, with at least 1 year experience aerobic training. The Human Ethics Committee of Rio de Janeiro Federal University approved this study (no 58659/02471312.8.0000.5257).The subjects performed a total of nine visits to the laboratory of the Brazilian Navy at City of Rio de Janeiro for physical tests on different days, except between visits I-II and VII-III. The interval between visits was one week between visits II-III-IV and VIII-IX, six weeks between the first day of training and visits V, four weeks between V-VI-VIII. All subjects from interval and continuous groups performed a total of 46 sessions of supervised running program.

Enrollment: 35 patients

Sex: Male

Ages: 25 to 32 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• self reporting no contraindication to high-intensity exercise.
• physically active on cardiorespiratory activities in a regular basis for at least six months.
• presence of negative responses on all items of the Questionnaire of Physical Activity Readiness (PAR-Q Test).

Exclusion criteria

• make use of medication that may interfere with the results, especially inhibitors appetites and dietary supplements.
• presence of joint problems that prevents the achievement of training.
• presence of disorders such as diabetes, dyslipidemia and anemia
• have performed intense exercise with lowers members before the training sessions.

Trial design

Primary purpose: Basic Science

Allocation: Randomized

Interventional model: Factorial Assignment

Masking: None (Open label)

---

35 participants in 3 patient groups

interval

Experimental group

Description:

The running training for interval group were performed on a treadmill for a period of 14 weeks, with a frequency of three times a week, lasting 20-minutes per session thus completing 46 sessions of training. The intensity and volume of training both were adapted according to the recommendations of the American College of Sports Medicine. The interval training group intensities ranged between 84-87% of maximal heart rate (HRmax) (vigorous intensity), 88-93%HRmax (near maximum intensity) and 94-99% HRmax (maximum intensity).

Treatment:

Other: running training

continuous

Experimental group

Description:

The running training for continuous group were performed on a treadmill for a period of 14 weeks, with a frequency of three times a week, lasting 20-minutes per session thus completing 46 sessions of training. The intensity and volume of training both were adapted according to the recommendations of the American College of Sports Medicine.The continuous group ran at an intensity of \~87% of maximal heart rate (HRmax)

Treatment:

Other: running training

control

No Intervention group

Description:

The control group did not do the running training program. Control did their normal physical activities.