The purpose of this study was to compare the effects of 4 weeks of
plyometric training on grass surface group and concrete surface on jumping
performance among volleyball athletes. The vertical jump was evaluated in
two types of jump; squat jump (SJ) and countermovement jump (CMJ). The
results of this study indicate that 4 weeks of intervention led to a significant
improvement in post-tests of SJ and CMJ (p < 0.05) for both grass surface
and concrete surface. However, in comparing the grass and concrete
surfaces, there was no significant difference (p > 0.05). These findings
suggest that plyometric training on different surfaces may be associated with
similar training-induced effects on neuromuscular factors related to the
efficiency of the stretch-shortening cycle.
Multiple studies have investigated the efficacy of acceptance and commitment therapy (ACT) in improving psychological flexibility among overweight and obese individuals. However, to date, no specific reviews have focused on ACT and weight-related difficulties in this population. This systematic review of the literature aims to identify and assemble all ACT interventions in randomized controlled trials (RCT) that address weight-related difficulties in the treatment of overweight and obese adults. The PRISMA 2020 framework was used for the systematic review, includes manual and computerized database searches. Five databases (Medline, PubMed, Scopus, PsycInfo, and Google) were utilized to gather all articles that: (a) published in English; (b) adopted the RCT design; (c) used ACT as an intervention; (d) included adult participants aged over 18 years with BMI of over 25 kg/m2, and (e) included weight-related difficulties and weight as outcome measures. The review identified seven studies comprising 698 overweight or obese participants of both genders. Improvements were reported in weight-related difficulties and percentage of weight loss in the ACT group and the non-ACT group. The present review supports ACT as an effective intervention that can help adults with weight-related difficulties and excess body weight. Further studies should be conducted in various overweight or obese populations with a more systematic RCT research design to establish the effectiveness of ACT in this area.