UTMB Index (UTMB INDEX) quantifies trail runners' performances based on race results and is one of the standards used to assess a trail runner's level. Recently, the UTMB Index calculation method was updated and the scoring was adjusted. We know the ITRA performance index is one of the earlier standards for evaluating a trail runner's level, predating the UTMB Index. So how do the men's and women's world top tens differ between the ITRA and UTMB systems — and how do China's men's and women's top tens compare? 一、世界男子前十 American runner Jim Walmsley ranks No. 1 on ITRA but only No. 3 on UTMB. He is the undisputed king under the ITRA system, but his UTMB Index is slightly behind two Kenyan runners. Kenyan Patrick Kipngeno is No. 1 on UTMB but only tied for No. 4 on ITRA, indicating that the UTMB system clearly favors his performances. Another Kenyan, Philemon Kiriago, is No. 2 on UTMB and No. 3 on ITRA — high on both lists, showing balanced strength. Spanish runner Kilian Jornet is sixth and seventh on the two lists, failing to make the top five on either. 二、世界女子前十 American Katie Schide is No. 1 on UTMB and No. 3 on ITRA; her UTMB Index score far exceeds her ITRA performance index. Swedish Tove Alexandersson is No. 1 on ITRA but only No. 4 on UTMB — although their scores are similar, the ranking difference is large. Only one Chinese runner, Yao Miao, appears in the ITRA world women's top ten, while the UTMB world women's top ten includes two Chinese runners: Yao Miao and Xiang Fuzhao. 三、中国男子前十 Meng Guangfu ranks No. 1 on both the ITRA and UTMB lists — without question the top male trail runner in China right now. Duoji is No. 2 in China's UTMB rankings and tied for No. 5 on ITRA; his UTMB performance stands out. Qin Guidu is in the top four on both lists, and his UTMB Index is higher than his ITRA performance index. Luo Canhua is No. 4 on UTMB and No. 8 on ITRA — a significant rise in UTMB ranking. Fan Banglin is No. 2 in China's ITRA rankings but did not make China's UTMB top ten, suggesting he either performs less well under the UTMB system or has competed less. Guan Yousheng and Wang Ruqin are No. 9 and No. 10 in China's ITRA rankings, but neither made the UTMB top ten. Deng Guomin and Zhang Huohua are No. 7 and No. 8 in China's UTMB rankings, but neither made the ITRA top ten. Most Chinese male runners have higher UTMB Index scores than ITRA performance indices (e.g., Meng Guangfu, Duoji, Qin Guidu, Luo Canhua), but Luo Tao and Yang Jianjian are the opposite: Luo Tao ITRA 922 vs UTMB 890; Yang Jianjian 915 vs 890. 四、中国女子前十 China's ITRA women's top two are "Yao Miao → Xiang Fuzhao", while China's UTMB women's top two are "Xiang Fuzhao → Yao Miao". The score range for China's ITRA women's top ten is 758–827, while for UTMB it's 722–825 — UTMB has a wider spread and a lower low-end score. Zheng Bingling appears in China's ITRA women's top ten but not in UTMB's top ten; conversely, Tang Jingyan appears in UTMB's top ten but not in ITRA's. What do you think about the differences between the ITRA and UTMB top tens? #ITRA #UMTB #ITRA performance index #UTMB index #TrailRunningBigBang