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Muscle fatigue characteristics of mine rescue personnel during pull-down dynamometer training
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Yunchen MENG1, 2, Liuhuan YU1, 2, Sanjun YANG**, 1, 2, Maosheng YE1, 2, Fang WU1, 2, Qiangsheng CHEN3
China Safety Science Journal | 2026, 36(3) : 238 - 246
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China Safety Science Journal | 2026, 36(3): 238-246
• Occupational Health •
Muscle fatigue characteristics of mine rescue personnel during pull-down dynamometer training
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Yunchen MENG1, 2, Liuhuan YU1, 2, Sanjun YANG**, 1, 2, Maosheng YE1, 2, Fang WU1, 2, Qiangsheng CHEN3
Affiliations
  • 1Sports Teaching and Research Department, China University of Mining and Technology-Beijing, Beijing 100083, China
  • 2Institute for Emergency Rescue Ergonomics and Protection, China University of Mining and Technology-Beijing, Beijing 100083, China
  • 3National Mine Emergency Rescue Datong Team, Datong Shanxi 037003, China
Published: 2026-03-28 doi: 10.16265/j.cnki.issn1003-3033.2026.03.0375
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This study analyzes the muscular fatigue characteristics of mine emergency rescue personnel during pull-down dynamometer training, aiming to provide scientific support for enhancing the safety and efficiency of mine emergency rescue training. Forty team members from the Datong National Mine Emergency Rescue Team were selected as participants. sEMG technology was used to record changes in muscle activation, muscle contribution rates, root mean square(RMS) amplitude, and MF under standardized pull-down dynamometer training conditions. The results indicate that the triceps and latissimus dorsi are the primary force-generating muscles, while the erector spinae plays a critical role in movement restoration and trunk stabilization. As the number of repetitions increases, the triceps brachii begins to appear fatigue in the second half of training. To maintain the training, the latissimus dorsi and erector spinae show enhanced compensatory activation, and the lower segment of the erector spinae exhibits a higher activation level while showing significant fatigue characteristics. This compensation pattern driven by triceps fatigue is the key inducement for increased lumbar load and elevated injury risk in rescue personnel. It is suggested that the strength endurance of triceps brachii and the stability control and anti-fatigue ability of core muscles should be strengthened in training.

mine rescue personnel  /  pull-down dynamometer  /  muscle fatigue  /  surface electromyography (sEMG)  /  median frequency (MF)
Yunchen MENG, Liuhuan YU, Sanjun YANG, Maosheng YE, Fang WU, Qiangsheng CHEN. Muscle fatigue characteristics of mine rescue personnel during pull-down dynamometer training[J]. China Safety Science Journal, 2026 , 36 (3) : 238 -246 . DOI: 10.16265/j.cnki.issn1003-3033.2026.03.0375
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Year 2026 volume 36 Issue 3
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doi: 10.16265/j.cnki.issn1003-3033.2026.03.0375
  • Receive Date：2025-10-14
  • Online Date：2026-07-08
  • Published：2026-03-28
Article Data
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History
  • Received：2025-10-14
  • Revised：2025-12-10
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Affiliations
    1Sports Teaching and Research Department, China University of Mining and Technology-Beijing, Beijing 100083, China
    2Institute for Emergency Rescue Ergonomics and Protection, China University of Mining and Technology-Beijing, Beijing 100083, China
    3National Mine Emergency Rescue Datong Team, Datong Shanxi 037003, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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