Changes and Differences in Body Composition and Strength Abilities of Athletes in Fitness and Bodybuilding at Different Intervals of Rest
|Článek v odborném periodiku
|Časopis / Zdroj
|Fakulta / Pracoviště MU
|hypertrophy; muscle mass; body fat; biceps; quadriceps
|Efforts to increase muscle mass (hypertrophy) are required in sports that are dedicated to lifting or weightlifting. Bodybuilding methods with moderate load and relatively short rest between sets and exercises for a selected muscle area, that induce a high amount of metabolic stress, can be effecti-ve for hypertrophy of muscle tissue. The paper deals with changes in body composition (muscle mass, adipose tissue and bone mass), and changes in the manifestations of maximal strength of the extensors and flexors of the lower and upper limbs in relation to different periods of rest (30 s, 60 s, 120 s). The research was carried out on 23 participants, aged 18–30 years, who were elite, natural bodybuilders, during a 5-week intervention of bodybuilding training.There are several outcomes which resulted from the study. At a statistical significance level of 5%, there was no significant difference in muscle tissue hypertrophy between the groups. The athletes who had a 60 second ret period achieved a two-fold increase in the percentage of fat free mass compared to the other two groups. At a statistical significance level of 5%, we noticed significant differences in the maximum force increase of the knee joint flexors, only in Group 3 (120 s) and by up to 11%. Significant differences in muscle strength increase were also observed in groups 2 and 3 in the elbow extensors and in the elbow flexors of Group 1 only.