Effect of external information on the performance in the chin-up/pull-up endurance test

The aim of the presented research is to assess whether external information can have any impact on the performance in the static strength performance test. The research sample consisted of 60 students at the age of 15-24 years. The test sample consisted of 112 persons (n = 112), of these 50 males and 62 females. The tested persons were randomly divided into three groups. The control group had 35 persons, the positively intervened experimental group of probands consisted of 39 people, and the negatively intervened experimental group of probands consisted of 38 people. Motor performance was represented by a test of static strength ability of upper extremities and torso, endurance in the chinup/pull-up position. All probands performed a pre-test, followed by a post-test one to two weeks apart. Prior to the post-test, positive or negative intervention was performed in the experimental groups. Based on the assessment of the impact of intervention, we used the relative expression of the frequencies of probands of individual groups, who showed improvement, worsening, or stagnation between the pre-test and post-test. We have found that 87% of the probands in the positively intervened group showed improvement, and 74% of the probands in the negatively intervened group showed worsening. This trend has been confirmed statistically and factually. Our experiment has proved that external information can have a significant impact on a subsequent motor performance.