The impact of pole use on vertical cost of transport and foot force during uphill treadmill walking before and after a simulated trail running competition.

IF 2.8 3区 医学 Q2 PHYSIOLOGY
Nicola Giovanelli, Lara Mari, Barbara Pellegrini, Lorenzo Bortolan, Mattia d'Alleva, Federico Schena, Stefano Lazzer
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Abstract

Purpose: Trail running poles are widely used among trail runners but their effects on cost of transport and biomechanics under fatigued conditions remains understudied. This study aimed to evaluate the effects of pole use on the walking vertical cost of transport (CoTvert) and foot force (FF) before and after a simulated trail running competition (STRC).

Methods: Sixteen trail runners ( V ˙ O 2 : 61.0 ± 8.3 ml/kg/min; ITRA performance index: 634 ± 107 points) performed walking trials with (PW) and without poles (CW) on an incline treadmill (18.6 degrees) before (PRE) and after (POST) a STRC. The course covered 31.2 km with 2086 m of elevation gain and was completed under race-simulated conditions. CoTvert and FF were measured using instrumented insoles, and axial pole force was recorded during PW.

Results: The STRC was completed in 4:25:33 ± 0:39:51 (hh:mm:ss) at an average heart rate (HR) of 81.4 ± 3.8% of HRmax. Walking CoTvert showed significant time and condition effects, with higher values without poles at POST (+ 2.50 ± 2.62%, p = 0.0183). Rating of perceived exertion (RPE) was lower with poles at both PRE and POST (p = 0.0022 and p = 0.0187, respectively). FF was significantly lower with poles at PRE (p = 0.0140) and POST (p < 0.0001). Poling force decreased at POST compared to PRE (p = 0.0026).

Conclusions: The main findings are that (1) CoTvert increases after STRC; (2) walking CoTvert and FF are lower with pole use and (3) upper limb force decreases at POST. These results support the use of poles in long-lasting events to reduce CoT, redistribute workload and possibly mitigate the fatigue effects.

在模拟越野跑比赛前后,使用杆对上坡跑步机行走过程中垂直运输成本和足力的影响。
目的:越野跑杆在越野跑者中广泛使用,但其对疲劳条件下运输成本和生物力学的影响仍未得到充分研究。摘要本研究旨在探讨在模拟越野跑比赛(STRC)前后,撑杆使用对步行垂直运输成本(CoTvert)和足力(FF)的影响。方法:16名越野跑者(V˙o2: 61.0±8.3 ml/kg/min;ITRA性能指数:634±107分)分别在倾斜跑步机上(18.6度)进行带(PW)和不带(CW)的步行试验。全程31.2公里,高程2086米,在模拟比赛条件下完成。使用测量鞋垫测量CoTvert和FF,并记录PW过程中的轴极力。结果:STRC在4:25:33±0:39:51 (hh:mm:ss)完成,平均心率(HR)为HRmax的81.4±3.8%。步行cot表现出明显的时间和条件效应,POST时无极点值较高(+ 2.50±2.62%,p = 0.0183)。感觉劳累评分(RPE)在术前和术后均较低(p = 0.0022和p = 0.0187)。结论:主要发现:(1)经STRC治疗后,CoTvert升高;(2)使用撑杆时,行走力降低;(3)POST时上肢力降低。这些结果支持在长时间赛事中使用杆来减少CoT,重新分配工作量,并可能减轻疲劳效应。
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来源期刊
CiteScore
6.00
自引率
6.70%
发文量
227
审稿时长
3 months
期刊介绍: The European Journal of Applied Physiology (EJAP) aims to promote mechanistic advances in human integrative and translational physiology. Physiology is viewed broadly, having overlapping context with related disciplines such as biomechanics, biochemistry, endocrinology, ergonomics, immunology, motor control, and nutrition. EJAP welcomes studies dealing with physical exercise, training and performance. Studies addressing physiological mechanisms are preferred over descriptive studies. Papers dealing with animal models or pathophysiological conditions are not excluded from consideration, but must be clearly relevant to human physiology.
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