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    The effects of eccentric hamstring training on lower extremity strength and landing kinetics in recreational female athletes
    (Ios Press, 2013) Salci, Yasar; Yildirim, Ahmet; Celik, Ozgur; Ak, Emre; Kocak, Settar; Korkusuz, Feza
    Hamstring training involving eccentric loading is an important protective factor in hamstring injuries. However, the effect of this mode of training on lower extremity loading in landing maneuver performance is unknown. The purpose of this study was to examine variations in eccentric hamstring strength after 10-weeks training program and the possible changes in landing kinetics. Twenty five recreational female athletes were voluntarily assigned to the Nordic Hamstraing Strength Training (N = 13) or control groups (N = 12). The training group performed 10-weeks eccentric hamstring strength training program. Baseline measures of landing kinetics were collected using a force plate while strength data was evaluated using an isokinetic dynamometer. Results indicated that NHST group increased their eccentric hamstring strength (pre = 2.34 +/- 0.28, post = 2.57 +/- 0.25 Nm/kgbw; p < 0.05) after training program albeit without changes in the dynamic control ratio. There were also significant decreases in peak anterior-posterior ground reaction force (PAPGRF; pre = 1.14 +/- 0.21 BW, post = 0.85 +/- 0.27 BW; p < 0.05) and peak vertical ground reaction force (PVGRF; pre = 6.27 +/- 1.00 BW, post = 5.34 +/- 1.01 BW; p < 0.05) scores for NHST group. The present study supports the positive effect of eccentric hamstring strength in altering landing kinetics in order to decrease the applied forces.
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    The Toxicity of Essential Oils From Three Origanum Species Against Head Louse, Pediculus humanus capitis
    (Springer Int Publ Ag, 2021) Arserim, Suha K.; Cetin, Huseyin; Yildirim, Ahmet; Limoncu, M. Emin; Cinbilgel, Ilker; Kaya, Tugba; Ozbel, Yusuf
    Purpose Pediculosis caused by human head louse, Pediculus humanus capitis De Geer (Anoplura: Pediculidae) is a public health problem with a high prevalence, especially among children in school age. Different chemical pediculicides (insecticides) are used against lice but the repeated application of these pediculicides for the treatment of P. humanus capitis infestation in the past decades has resulted in the development of resistance. The plant essential oils have been used as alternative sources of lice treatment agents. Pediculicidal activity of the essential oils of three Origanum species (O. onites, O. majorana and O. minutiflorum) against P. humanus capitis adults was examined in this study. Methods Essential oils from aerial parts of three Origanum species were obtained by hydrodistillation using a Clevenger-type apparatus. P. humanus capitis specimens used were obtained from infested children by combing method at primary schools. Adult lice were exposed to three dilutions (1%, 0.5% and 0.1% w/v) of tested oils for 5 min using the adult immersion test. Results According to the results, all Origanum essential oils at 1% concentration have been shown to significantly decrease the rate of limb, bowel and abdomen movements, producing more than 90% mortality after 12 h. Conclusion Our results indicated that Origanum essential oils can be used for the development of new pediculicides against head louse.