HIGH INTENSITY EXERCISE AND FLEXIBILITY OF THE LOWER LIMBS: DOSE-EFFECT STUDY

João Rafael Valentim-Silva,Estélio Henrique Martin Dantas,Talita Adão Perini De Oliveira,Glauber Lameira De Oliveira,Mario Cezar De Souza Costa Conceição,Marcelo Lentini Costa

doi:10.1590/1517-869220162204147707

Abstract

ABSTRACT Introduction: Sports scientists have been studying the phenomenon involving different types of exercises and their influence on other activities. Stretching exercises have a negative influence on muscular strength and power output, as do high intensity or long duration cardiovascular training. Nevertheless, several studies have found the opposite to be true Nevertheless, few investigations have studied the opposite. Objective: To determine whether high intensity power exercise influences muscular flexibility in an acute manner. Methods: A sample of forty-three male and female young adults aged between 18 and 28 years, with a mean age of 22.88 + 3.04 years, who have practiced physical activity for at least six months. To determine flexibility, the sit-and-reach test was used. For the high intensity training, a 45º leg press was used. A 10-rep movement was performed at 85% of 1 RM, in both pre- and post-tests. Statistic analysis was conducted using the ANOVA and Scheffer's post-hoc tests, with a level of significance for differences of < 0.05. Results: Comparison of the pre- and post-tests proved to be statistically significant from the baseline from the fourth to the seventh repetitions. Conclusion: Strength exercises at 85% of 1RM seem to significantly increase range of motion in an acute manner, and the growth of this range of motion has a dose-effect response.

Highlights

Sports scientists have been studying the phenomenon involving different types of exercises and their influence on other activities
Stretching exercises have a negative influence on muscular strength and power output, as do high intensity or long duration cardiovascular training
Its importance is not yet well known, we know that muscle strength performance has influences on both medium and long-term results for people subjected to such training

Summary

Introduction

Sports scientists have been studying the phenomenon involving different types of exercises and their influence on other activities. Sports scientists have been studying the phenomenon involving different types of exercises and their influence in other activities This method of physical training is called concurrent training. It is known, for example, that flexibility exercise can have negative influences on strength production[1,2,3] and muscular potency, as well as cardiovascular training. Several investigations have shown that flexibility training can immediately damage the production of muscle strength and potency[1,5,6,8,9] This type of training can contribute negatively to performance in high-performance sports[10]. High-intensity or long-term cardiovascular training is a peripheral phenomenon, and this exercise modality diminishes the muscle glycogen reserves[11,12]. These glycogen reserves are the most significant source of fuel used in the vigorous contraction of muscles[13,14,15]

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Discussion

Conclusion