background:  the purpose of the present study was to examine whether a first bout of exhaustive exercise can change inflammo-endocrine responses to second subsequent similar exercise on the same day.  cortisol, tnf-α, and adenosin deaminas enzyme (ada) were assessed during a progressive endurance protocol. methods: eight well trained endurance runners (aged 23.13±3.39 years; weight, 66.21±9.47 ...

BACKGROUND Exhausting physical exercise increases lipid peroxidation and causes important muscle damages. The human body tries to mitigate these adverse effects by mobilizing its antioxidant defenses. OBJECTIVES This study aims to investigate the effect of a maximal versus supra-maximal race sustained until exhaustion on lipid peroxidation, antioxidant activity and muscle-damage biomarkers in...

The present study analyzed the acute effects of an incremental running test on countermovement jump (CMJ) and handgrip strength performance in endurance athletes, considering the effect of post-exercise recovery time and sex. Thirty-three recreationally trained long-distance runners, 20 men and 13 women, participated voluntarily in this study. The participants performed the Léger test, moreover...

Submaximal and maximal physiological parameters were measured on a progressive treadmill test in 11 Columbia University tracksen trained for various events. All runners were also tested in the 22C, 440, 880, one-mile, and two -rile running events. Oxygen uptake was significantly related only to time in the one-mile run. Heart rates (HRs) at each submaximal load on the treadmill were significant...

BACKGROUND Marathon running has become popular, particularly among inexperienced runners. HYPOTHESIS Many marathoners are inexperienced and lack concern for potential complications of marathon running. STUDY DESIGN Cross-sectional survey. METHODS In sum, 419 runners completed a survey on a variety of topics regarding training for a marathon and hydration strategies. RESULTS Overall, 211...

This study determined whether a 6-week regimen of plyometric training would improve running economy (i.e., the oxygen cost of submaximal running). Eighteen regular but not highly trained distance runners (age = 29 +/- 7 [mean +/- SD] years) were randomly assigned to experimental and control groups. All subjects continued regular running training for 6 weeks; experimental subjects also did plyom...

The effects of multi-ingredient performance supplements (MIPS) on perceived soreness, strength, flexibility and vertical jump performance following eccentric exercise are unknown. The purpose of this study was to determine the impact of MIPS (NO-Shotgun®) pre-loaded 4 weeks prior to a single bout of downhill running (DHR) on muscle soreness and performance. Trained male runners (n = 20) were st...

Critical velocity (CV) represents, theoretically, the highest velocity that can be sustained without fatigue. The aim of this study was to compare CV computed from 5 mathematical models in order to determine which CV estimate is better correlated with 1-hour performance and which model provides the most accurate prediction of performance. Twelve trained middle- and long-distance male runners (2...

It is well established that an increased capacity of skeletal muscle to oxidize fatty acids can spare glycogen and delay the onset of fatigue in mild- to moderate-intensity exercise. The purpose of the following study was to examine the effect of LifeWave® energy patches on non-protein substrate utilization in Division-1 cross-country runners. To determine the effect of the patches subjects wer...