On The Measurement of Running Style 1: Risks and Benefits in Transitioning To Barefoot/Minimal Footwear Running
M. Daumer* PhD, C. Kleinmond PhD, C. Stolle MSC, C. Lederer PhD, M. Hilgers MD, M. Walther MDThe individual running style has an impact both on running performance and on running injury risk. The runner aiming to improve his running style finds himself confronted with contradicting recommendations from the literature and there exist even smartphone apps, social platforms, video tools etc. claiming to coach the runner towards a healthier running style. The goal of this paper is to present quantitative estimates for the risks and benefits in transitioning to barefoot/minimal footwear running from our recent cross-sectional on-line study.
Influence of Psychophysical Recovery and Stress on Physical and Technical Performance Parameters in Professional Soccer
Philipp Laux, Bertram Krumm, Herta Flor*
We examined the role of stress and recovery for technical and physical performance parameters of 19 professional soccer players in a prospective non-experimental cohort design over the course of 2 consecutive seasons. We employed the Recovery-Stress Questionnaire for Athletes with 52 items (RESTQ-Sport 52) and collected 5 performance parameters with the computerised stationary tracking system Amisco. The general stress scales General Stress (p=0.01), Emotional Stress (p=0.02) and Lack of Energy (p=0.04), the general recovery scale General Well-Being (p=0.04) and the sport-specific recovery scales Personal Accomplishment (p<0.01) and Self-Efficacy (p=0.02) were significantly associated with the performance parameter loss of ball possession.
Naproxen Sodium Does Not Affect Aerobic Capacity
Lamont Cavanagh MD, David K. Brennan MEd, Thomas W. Allen DO MPH*, Douglas Ivins MD, Louis E. Mulke DO
A within-subject repeated measures design study was conducted to measure the effect of oral naproxen sodium on physical performance during exercise. Fifteen recreational runners, nine males (mean age 30.8 years) and six females (mean age 26.9 years) participated in the study. A modified Bruce graded exercise treadmill test was conducted during weeks 1, 5, and 7. The participants ingested two 220 mg naproxen sodium tablets each morning and 12 hours later for a total of 880 mg per day during weeks 3, 4, and 5. The subjects were retested 2 weeks after stopping the drug.