Acute Effects of PNF Stretching on Maximum Voluntary Contraction in Men

Cengiz, Asim
Demirhan, Bilal
This study aimed to investigate the influence of PNF stretching on the peal torque (PT) isokinetic leg extension PT at 60 degrees and 180 degrees(.s-1) in the stretched and unstretched limbs. Twelve college Male athletes who were enrolled in a fitness class volunteered to participate in the study. Pre and post PNF stretching exercises isokinetic PT for extension and flexion of the dominant and non-dominant limbs were measured. There was a decrease in the PT for both extension and flexion between the pre- and post-stretching conditions. The reductions in PT experienced in the present study tentatively support the hypothesis that stretching may, change the length-tension association.


Anomalous stress field and active breaching at relay ramps: a field example from Gediz Graben, SW Turkey
Ciftci, N. Bozkurt; Bozkurt, Erdin (2007-07-01)
Relay ramps form at different scales in extensional terrains to accommodate the differential stretching among the overlapping bounding-normal fault segments. The major boundary structure of the Gediz Graben (SW Turkey) is segmented, with formation, evolution and active breaching of relay ramps. The Akqapinar relay ramp is an example of these processes that forms within a 2 kin wide overlap zone between similar to E-W-trending segments on the southern margin of the Gediz Graben. Change of structural style at...
Acute effects of local vibration on muscle performance at different durations and frequencies
Yıldırım, Ahmet; Korkusuz, Feza; Department of Physical Education and Sports (2010)
The purpose of the present study was to investigate the acute effects of local vibration on muscle performance at different durations and frequencies. Fifteen male handball players participated in the study voluntarily. University’s Ethics Committee approved the study and the informed consent forms were filled by all participants. Different vibration durations, (10 sec, 1 min, 10 min), different frequencies (40 and 80 Hz), dominancy (dominant and non-dominant) and conditions (vibration and no-vibration) wer...
Nonlinear Dynamic Analysis of a Spiral Bevel Geared System
Yavuz, Siar Deniz; Saribay, Zihni Burcay; Ciğeroğlu, Ender (2017-02-02)
A nonlinear dynamic model of a spiral bevel gear train mounted on flexible shafts and bearings is proposed in this study. The finite element model of shafts is combined with a three-dimensional discrete mesh model of a spiral bevel gear pair. Bearing flexibilities are as well included in the model. Gear backlash is incorporated into the model in the form of clearance-type displacement functions and clearance nonlinearity and stiffness fluctuations of the bearings are neglected. A time-invariant mesh stiffne...
Numerical studies on eccentrically braced frames
Kuşyılmaz, Ahmet; Topkaya, Cem; Sarıtaş, Afşin; Department of Civil Engineering (2014)
Numerical studies were performed on eccentrically steel braced frames to ascertain seismic performance factors and to examine dynamic characteristics of eccentrically braced frames (EBF). Pursuant to this goal a computer program which facilitates EBF designs was developed. In the first phase, the approximate period formula given in ASCE7-10 was evaluated and a technique based on global deformation characteristics was developed to improve the fundamental period estimates for EBFs. The results indicate that t...
Critical Fluid Velocities for Removing Cuttings Bed Inside Horizontal and Deviated Wells
Ozbayoglu, M. E.; Saasen, A.; Sorgun, M.; Svanes, K. (2010-01-01)
This study aims to estimate the critical fluid flow velocity for preventing the development of a stationary bed using empirical correlations valid for horizontal and highly inclined wellbores that can be easily used at the field. For this purpose, experiments have been conducted at METU-PETE Cuttings Transport Flow Loop for various conditions. Observations showed that a stationary bed is developed when the fuid velocity is less than 6.0 ft/s, and a critical fluid velocity of 8.0 ft/s is required to establis...
Citation Formats
A. Cengiz, B. Demirhan, Ç. YAMAN, and M. YAMAN, “Acute Effects of PNF Stretching on Maximum Voluntary Contraction in Men,” ANTHROPOLOGIST, pp. 500–504, 2015, Accessed: 00, 2020. [Online]. Available: