2015
DOI: 10.1080/00140139.2015.1073792
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Effect of uphill walking with varying grade and speed during load carriage on muscle activity

Abstract: Indian soldiers, while guarding the mountainous border areas, often carry loads in steep uphill gradients. This activity may predispose the risk of muscle injury. The present study aimed to examine the effects of an increasing load, speed and gradient during incremental uphill treadmill walking on different muscles. Twelve infantry soldiers walked on a treadmill at two speeds (2.5 and 4 km/h) with no load, and carrying 10.7, 17 and 21.4 kg loads at 0, 5, 10, 15, 20, 25% gradients. Electromyographic responses o… Show more

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Cited by 16 publications
(23 citation statements)
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“…The duration of load carriage at each gradient was fixed at 6 min as any physically fit individual takes approximately 4 min to reach steady state while performing the same exercise at the same intensity [ 10 ]. This study design is supported by previous research in similar areas carried out in the same laboratory [ 29 , 34 ].…”
Section: Methodssupporting
confidence: 56%
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“…The duration of load carriage at each gradient was fixed at 6 min as any physically fit individual takes approximately 4 min to reach steady state while performing the same exercise at the same intensity [ 10 ]. This study design is supported by previous research in similar areas carried out in the same laboratory [ 29 , 34 ].…”
Section: Methodssupporting
confidence: 56%
“…Heart rate (HR, beats/min), oxygen uptake [VO 2, ml/(min·kg)], energy expenditure (EE, kcal/min) and respiratory frequency (RF, breaths/min) of all of the participants were determined by the process of breath-by-breath gas analysis using a K4b 2 system (K4b 2 , Cosmed, S.R.L, Italy) throughout the experiments. For all of the above mentioned parameters the average value of last 2 min for each of the 6 min at each gradient were used for data processing and subjected to statistical analysis [ 31 , 34 ].…”
Section: Methodsmentioning
confidence: 99%
“…It also provides the main power for walking during terminal stance phase 30 . Soleus is also known as plantar flexor of ankle especially during bent knee position 31 . Erector spinae helps in adjustment of posture during uphill walking.…”
Section: Discussionmentioning
confidence: 99%
“…The 6 min duration of the experiment was selected in view of the fact that physiological systems take 3-4 min time to get stabilised during continuous activity of same intensity. The authors gathered experience in this field from their previous studies with similar work intensities and objectives 15,16 . …”
Section: Experimental Protocolmentioning
confidence: 99%
“…Nowadays, commercial skin surface electromyography (sEMG) garments can be utilized for the measurement of duration and intensity of dynamic neuromuscular function during occupational settings [15][16][17]. Despite the sEMG technology development, assessment of muscle activity has rarely been utilized in applied military field studies, but more so in standardized laboratory conditions [18][19][20]. For example, Paul et al [19] observed a 242% increase in muscle activity of the knee extensors in soldiers carrying a 21.4-kg military specific load on a treadmill with a pace of 4 km/h and 25% gradient, when compared to the 0% gradient condition.…”
Section: Introductionmentioning
confidence: 99%