Scholarlink

<p>During proprioceptive neuromuscular facilitation (PNF) stretching, if pain or injury prevents the use of a range-limiting muscle (antagonist), an agonist contraction (AC) technique targeting the opposing range-limiting muscle can serve as an alternative. However, only a few studies have examined the effects of AC PNF stretching. This study used a repeated-measures design to investigate the effects of AC PNF stretching in the straight leg raise (SLR) and active knee extension (AKE) positions on lower extremity flexibility. Thirty-one healthy adults participated in the study. The sample size was determined using G*Power, with an estimated effect size of 0.25, <i>α</i> = 0.05, and power = 0.80. Because of potential sex-based differences in flexibility, the investigation was conducted separately for males and females. The participants underwent AC PNF stretching in the SLR position, followed by AC PNF stretching in the AKE position. Hip and knee flexibility were assessed using the SLR and AKE tests before and after stretching. In males, significant increases in flexibility, measured using both the SLR and AKE tests, were observed after the first AC PNF stretch (SLR position). However, no significant increase was observed after the second stretch (AKE position). In females, the SLR test did not show a significant increase after the first stretch, whereas the AKE test did. AC PNF stretching significantly increased lower limb flexibility. These findings suggest that AC PNF stretching may be a beneficial alternative for individuals who cannot perform range-limiting muscle contractions. The sex-specific responses observed in the SLR and AKE positions highlight the need for a more thorough understanding of AC PNF stretching in clinical settings.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Sex-specific effects of agonist contraction PNF stretching on lower extremity flexibility

  • 期刊论文

  • 发表日期：

    2025年4月18日

查看全文
  • Wootaek Lim

摘要

During proprioceptive neuromuscular facilitation (PNF) stretching, if pain or injury prevents the use of a range-limiting muscle (antagonist), an agonist contraction (AC) technique targeting the opposing range-limiting muscle can serve as an alternative. However, only a few studies have examined the effects of AC PNF stretching. This study used a repeated-measures design to investigate the effects of AC PNF stretching in the straight leg raise (SLR) and active knee extension (AKE) positions on lower extremity flexibility. Thirty-one healthy adults participated in the study. The sample size was determined using G*Power, with an estimated effect size of 0.25, α = 0.05, and power = 0.80. Because of potential sex-based differences in flexibility, the investigation was conducted separately for males and females. The participants underwent AC PNF stretching in the SLR position, followed by AC PNF stretching in the AKE position. Hip and knee flexibility were assessed using the SLR and AKE tests before and after stretching. In males, significant increases in flexibility, measured using both the SLR and AKE tests, were observed after the first AC PNF stretch (SLR position). However, no significant increase was observed after the second stretch (AKE position). In females, the SLR test did not show a significant increase after the first stretch, whereas the AKE test did. AC PNF stretching significantly increased lower limb flexibility. These findings suggest that AC PNF stretching may be a beneficial alternative for individuals who cannot perform range-limiting muscle contractions. The sex-specific responses observed in the SLR and AKE positions highlight the need for a more thorough understanding of AC PNF stretching in clinical settings.