Publications by authors named "Panagiotis Stefanidis"

Background: An uncommon type of urinary calculus, Jackstone was named after its distinct resemblance to the children's game "Jacks." It typically involves the bladder and, to a lesser extent, the upper urinary tract.

Case Presentation: Herein, we report a case of Jackstone vesical calculus in a 75-year-old male undergoing elective open prostate surgery for benign prostate hyperplasia refractory to medical treatment.

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Introduction: The quality of the initial transurethral resection of bladder tumors (TURBT) plays a key role in accurate local staging thus affecting treatment decision-making and disease prognosis. TURBT is still the gold standard for non-muscle invasive bladder cancer (NMIBC). However, en bloc resection of bladder tumors (ERBT) gradually expanded as a promising alternative to TURBT, aiming to overcome certain inherent limitations of conventional resection.

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Introduction: Surgical clips (SCs) have been widely used for a variety of surgical procedures over the years. Despite their advantages and proven effectiveness, several clip-related complications have been reported, creating dilemmas as to their optimal use.

Case Description: Herein, we present a rare delayed and incidental discovery of two endourethral metallic SCs in a 77-year-old male seeking treatment for acute renal colic.

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Background: The purpose of the study was to investigate the effect of one-year soccer training on physical fitness performance, of under ten (U10) and under twelve (U12) youth levels.

Methods: The study included 28, 10-year-old children, and 28, 12-year-old children. In the U12 group, 19 children participated only in the physical fitness sessions at school (control group) and 9 children in four extra soccer trainings (soccer group).

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Background: Beach volleyball is frequently used as a conditioning activity for indoor volleyball players, but little information exists regarding any performance benefits when transitioning from sand to hard court. The present study examined the effect of 12 weeks beach volleyball training on muscle performance of indoor volleyball players.

Methods: Eleven athletes who completed an indoor volleyball season and were willing to train and compete at beach volleyball, participated in the study.

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The objective of this study was to investigate the potential variations in cardiorespiratory and metabolic parameters and running performance among 3 modes of exercise of the same duration, namely, intermittent running with active recovery (AR) or passive recovery (PR) and continuous running (CR) and whether these variations could affect passive recovery time (PRT). Fifteen male physical education students with a subspecialty in soccer were studied (mean age 22.3 ± 2.

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The aim of this study was to examine and to compare alterations in the secretion of atrial natriuretic peptide (ANP) during different exercise-testing protocols in moderately trained men. Fifteen healthy male physical education students were studied (mean age 22·3 ± 2·5 years, training experience 12·3 ± 2·5 years, height 1·80 ± 0·06 m, weight 77·4 ± 8·2 kg). Participants performed an initial graded maximal exercise testing on a treadmill for the determination of VO(2max) (duration 7·45-9·3 min and VO(2max) 55·05 ± 3·13 ml kg(-1) min(-1) ) and were examined with active recovery (AR), passive recovery (PR) and continuous running (CR) in random order.

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The purpose of this study was to investigate the long-term effects of high intensity resistance training on myosin heavy chain (MHC) isoform composition of single fibres. Muscle biopsies were obtained from the right vastus lateralis of eight bodybuilders (BB) and seven physical education students (PES). Histochemical analyses were used to determine the fibre type distribution and the fibre cross-sectional area.

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Article Synopsis
  • * Muscle biopsies were analyzed for different muscle fiber types and myosin heavy chain composition, but no significant differences were found between the arms for any of the muscle fiber types.
  • * The results suggest that regular tennis training does not significantly alter the muscle fiber types between the dominant and non-dominant arms in elite tennis players.
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The purpose of this study was to examine the effects of prolonged basketball skills training on maximal aerobic power, isokinetic strength, joint mobility, and body fat percentage, in young basketball players, and controls of the same age. Twenty basketball players and 18 control boys participated in the study. Basketball players participated both in their school's physical education program and in a children's basketball team training program.

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