Respiratory responses and isocapnic buffering phase in child and youth soccer players during an incremental exercise test.

Purpose: This study investigated the respiratory response and isocapnic buffering (IB) phase during an incremental exercise test to exhaustion in 16 child soccer players (11.9±0.9 years) and 18 youth soccer players (18.

Changes in hematopoietic stem cell numbers following acute exercise in non-athlete marathon runners.

Purpose: Hematopoietic stem cell (HSC) transplant is one of the curative methods for some patients with hematological malignancies. Granulocyte colony-stimulating factor (G-CSF) is the most common drug used to mobilize CD34 cells, generally found in small numbers. Recent evidence showed that exercise causes transient mobilization in HSC.

The relationship between cardiac damage biomarkers and heart rate variability following 60 min of running.

Purpose: Endurance exercise may cause transient alterations in cardiac tissue. The number of studies evaluating the relationship between changes in heart rate variability (HRV) and cardiac biomarkers following an endurance event is limited. We hypothesized that there would be a time-dependent correlation between biomarkers of cardiac damage and the reduction in parasympathetic indices of HRV within 24 h after 60 min of running in middle-aged recreational runners.

A Comparison of the Maximal Fat Oxidation Rates of Three Different Time Periods in The Fatmax Stage.

This study aimed to compare the maximal fat oxidation (MFO) rates obtained from the stage average, last 2 min average, and highest value in the Fatmax stage determined with a 6 min step protocol. A total of 35 overweight, sedentary healthy men (age: 25.4 ± 0.

Seasonal variations in body composition, maximal oxygen uptake, and gas exchange threshold in cross-country skiers.

Introduction: In order to ensure that athletes achieve their highest performance levels during competitive seasons, monitoring their long-term performance data is crucial for understanding the impact of ongoing training programs and evaluating training strategies. The present study was thus designed to investigate the variations in body composition, maximal oxygen uptake (VO), and gas exchange threshold values of cross-country skiers across training phases throughout a season.

Materials And Methods: In total, 15 athletes who participate in international cross-country ski competitions voluntarily took part in this study.