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National Running Club Database: Assessing Collegiate Club Athletes' Cross Country Race Results
Jonathan A. Karr Jr, Ben Darden, Nicholas Pell, Ryan M. Fryer, Kayla Ambrose, Evan Hall, Ramzi K. Bualuan, Nitesh V. Chawla
https://arxiv.org/abs/2509.10600

National Running Club Database: Assessing Collegiate Club Athletes' Cross Country Race Results
The National Running Club Database (NRCD) aggregates 15,397 race results of 5,585 athletes from the 2023 and 2024 cross country seasons. This paper introduces the NRCD dataset, which provides insights into individual athlete progressions, enabling data-driven decision-making. Analysis reveals that runners' improvement per calendar day for women, racing 6,000m, and men, racing 8,000m, is more pronounced in athletes with slower initial race times and those who race more frequently. Additionally, …

Analysis of Biomedical Data to Assess the Risk of Heart Rate Variability in Athletes Participating in Long-Term Excessive Endurance Exercise
Saeid Aghasoleymani Najafabadi, Hadi Jabbari Saray
https://arxiv.org/abs/2507.10556

Analysis of Biomedical Data to Assess the Risk of Heart Rate Variability in Athletes Participating in Long-Term Excessive Endurance Exercise
Amateur marathon runners who exercise excessively over time have pathological structural changes in their hearts and aortas. Amateur marathon runners' cardiovascular system adaptations and dangers are discussed in this article. After completing endurance races, amateur athletes experience a series of cardiac modifications, including temporary elevation and changes in biomarkers of cardiac damage associated with an increased risk of coronary atherosclerosis, arrhythmias, and sudden cardiac death…