Abstract
Abstract This study analyzed the responses of 24 sessions of High Intensity Interval Training (HIIT) and Continuous Moderate (CM) on tissue damage, oxidative stress and glycemic profile of rats in liquid medium. Twenty-four Wistar rats participated, divided into three groups: sedentary (GSED), the one who performed the HIIT (GHIIT) and the one who performed the CM (GCM). Performed three times a week alternately for 8 weeks, and the GHIIT performed 20 seconds of exercise for 10 rest. The CM was a moderate intensity swim. GHIIT increased creatine kinase compared to GSED (GSED: 140.40 + 35.48 U / I; GHIIT: 442.60 + 8.35 U / I; p = 0.0008, representing a percentage increase of 215.24); lactate dehydrogenase was increased in GHIIT and GCM compared to GSED (GSED: 112.8 + 28.08 U / I; GHIIT: 250.9 + 70.67 U / I, a percentage increase of 122.42; GCM: 241.8 + 100.70 U / I, with a percentage increase 114.36; p = 0.006), in contrast, GHIIT increased non-oxidized liver sulfhydryls compared to GCM (GHIIT: 498.70 + 214.30 nmol / ml; GCM: 270.50 + 104.40 nmol / ml, the percentage change was 84.36; p = 0.03). There was greater glycemic maintenance in the GCM (p = 0.0002). It is concluded that the protocols of HIIT and CM, of this study, point to a possible tissue injury, in contrast, HIIT develops the adaptive capacity of the hepatic antioxidant system and the CM promotes greater glycemic support.
Highlights
High Intensity Intervaled Training (HIIT), despite existing in the early twentieth century, has been the subject of much research and has attracted many followers, to the point of being in the current third fitness position worldwide[1]
The main data referring to tissue injury regarding the mean and standard deviation of the groups: sedentary (GSED), High Intensity Interval Training (GHIIT) and Continuous Moderate (CM) are listed in table 1
Increase of lactate dehydrogenase (LDH) in the groups that did the HIIT and the Continuous Moderate (GCM) in relation to (GSED), a percentage increase of 122.42 (GHIIT); and a percentage increase 114.36 (GCM) there was no difference between the groups trained in this marker, which can suggest a better action of the antioxidant system throughout the training
Summary
High Intensity Intervaled Training (HIIT), despite existing in the early twentieth century, has been the subject of much research and has attracted many followers, to the point of being in the current third fitness position worldwide[1]. It consists of a training that mixes intervals of high intensity exercises with intervals of recovery, which can be active or passive. It has a maximum intensity, supramaximal, usually performed from 80% of the Maximum Heart Rate (FCM); active recovery intervals can be performed with intensity below the main exercise. The Continuous Training (CT) is characterized by performing the exercise without pause from start to finish. It is based on exercises typically of a cyclical nature, whose intensity is generally low to moderate, that is, below the anaerobic threshold
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