Efeito agudo do exercício de força em respostas afetivas

Abstract

Introduction: The low rates of adherence to regular exercise limited the achievement of the benefits, such as reducing anxiety and improving mood. The acute response to exercise is an important variable that predicts adherence and mental health. However, the lack of evidence regarding the acute effects of resistance exercise on affect and anxiety limit the conclusion about this theme and, consequently, the clinical practicing. Thus, this dissertation aimed to investigate the acute effect of strength exercise by two papers: Objective 1: To review the acute effect of strength exercise on affective response. Method 1: We adopted the proposals of PRISMA and searching in MEDLINE/PubMed, ISI Web of Knowledge, PsycINFO and Scielo. Outcome 1: Eleven studies were included. When compared with the control, strength training, adjusted in 70-80% 1RM with 2-4 sets of 10 repetitions and 120-240 s intervals between sets, improved the affect. The comparison in low-moderate intensities of strength exercises, adjusted in 40-70% RM with 3 sets of 5 to 20 reps and 30 to 90 s intervals between sets, seems to be more effective for affective improvements. Objective 2: To compare the effect of prescribed and self-selected intensity of strength exercise. Method 2: Sixteen participants performed four exercise sessions at 40% of one repetition maximum (40% 1RM), 60% 1RM, 80% 1RM and self-selected (Aa) in random order, and a control session. The affective response was assessed by Profile of Moods States (POMS) and anxiety by State and Trait Inventory Scale (SAI). Result 2: Large inter-individual variability was found in anxiety and moods scores. No significantly differences were found between conditions and evaluation times. Conclusion: When the inter-individual variability is unknown, moderate intensity of strength exercise seems to more useful to improve anxiety and affect. When this variability is encompasses, it is not possible to identify optimal exercise adjustment. Thus, the prescription should be individualized for be perceived as pleasurable.