Based on these findings, clinicians may expect young male and female volleyball athletes to demonstrate similar and symmetrical lower-extremity 2-dimensional knee joint FPPA values across screening tests intended to identify lower-extremity injury risk factors. However, greater FPPA values should be expected during the more dynamic DVJ task.

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The purpose of this study was to investigate the association between anthropometric (height and weight) and physical parameters in Brazilian football athletes and to determine if the relationship between various anaerobic indices of running anaerobic sprint test (RAST) and physical performance are dependent upon position. The present study is an observational, randomized cross-sectional research, where thirty-eight players (24.7 ± 3.9 years) performed a series of tests that consisted of physical fitness (horizontal jump, abdominal curl, push up, 10, 20 and 30 m sprint speed), anthropometric and RAST assessments. The players were classified into three groups: skill players (n = 14), big skill players (n = 10), and linemen (n = 14). One-way ANOVA followed by Bonferroni test presented no difference between groups for anthropometric, horizontal jump, push up, T agility, 10, 20, and 30 m sprint speed tests and all anaerobic indices computed (p > 0.05). However, higher abdominal curl performance was noted under skill player versus big skill player group (p = 0.045). In big skill players group, the relationship between 10, 20 and 30 m sprint speed and muscle power reduction index was great. In conclusion, the results of the current study indicated that only agility and sprint tests presented an association with the anaerobic performance for all group analyzed.

Background: Foam rolling (FR) has become very popular in recent years; however, the practice of FR between sets of resistance training (RT) for the lower limbs needs further examination. Purpose: Therefore, the purpose of the present study was to examine the effect of FR for the agonists (quadriceps) and antagonists (hamstrings) between multiple sets of the leg extension on repetition maximum performance (RM), fatigue resistance index (FRI), and muscle soreness (MS). Study design: Quasi-experimental clinical trial. Methods: Twenty trained men participated in this study (30.35 ± 6.56 years, 1.77 ± 0.05 cm, 87.70 ± 7.6 kg) and attended seven sessions with 48 h between sessions, (one familiarization session; two 10-RM test and retest sessions; and four experimental sessions). The four experimental sessions were performed in random order and included: agonist foam rolling (AFR), antagonist foam rolling (ANTFR), agonist/antagonist foam rolling (A/ANTFR), and traditional control (TP, without foam rolling). All sessions consisted of three sets for maximal repetitions with a 10-RM load for the leg extension. In the AFR and ANTFR sessions, there was a 120 s rest interval between sets, during which FR was done for the agonists or antagonists, respectively. In the A/ANTFR protocol, there was a 120 s rest interval between sets, during which FR was done for the agonists and antagonists. In the traditional protocol (TP), there was a 120 s passive rest interval between sets. Results: Regarding the total training volume (TTV), significant differences were noted between sessions (F3,57 = 11.014; p = 0.0001). The AFR, ANTFR, and A/ANTFR sessions had significantly higher TTV versus the TP (p < 0.05). Regarding the FRI, significant differences were noted between sessions (F3,57 = 2917, p = 0.042). A significantly higher fatigue index was shown for the ANTFR and AFR sessions versus the TP (p < 0.05). Regarding the total number of repetitions, significant differences were noted between sessions (F3,57 = 11.086, p = 0.0001). The total number of repetitions was significantly higher in the A/ANTFR, ANTFR, and AFR versus the TP session (p < 0.05). MS was significantly lower in the A/ANTFR, ANTFR, and AFR sessions versus the TP session (p < 0.05). Conclusion: In conclusion, foam rolling between sets for the agonist or antagonist separately or in succession, resulted in greater neuromuscular performance and higher fatigue indices, as well as reducing the perception of acute muscle soreness.

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