Biomechanical Analysis of Two Change-of-Direction Maneuvers While Running

Schot, Philip K.; Dart, Jolene A.; Schuh, Michelle

doi:10.2519/jospt.1995.22.6.254

Cited by 50 publications

(57 citation statements)

References 3 publications

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“…Although turning moments will aid the body in rotating and maintaining a sagittal plane coincident with the curvilinear direction of travel, the mediolateral forces generated in curvilinear motion appear to be of a greater magnitude. Such findings would agree with early theory [7], that both mechanisms might be used, yet the increase in mediolateral force is the principal one.…”

Section: Discussionsupporting

confidence: 88%

“…However, whilst providing a baseline data set, the study only took data from a single footstrike, using a curve of radius 31.5 m, which is far less severe than that exhibited in most exercise modalities, and was not performed on a surface, or using the footwear typical to field sports. The authors suggested that the change in direction was predominantly created by increased mediolateral force [3], whereas citing from other investigations [7] suggested torque from the musculature of the torso, pelvis and lower extremity was the mechanism by which to accomplish non-linear motion in the form of cutting manoeuvres. An analysis of mediolateral forces in conjunction with free moment values from ground reaction force measures may resolve this conflict in the literature of the mechanisms responsible for curvilinear gait.…”

Section: Introductionmentioning

confidence: 97%

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Contributions of the inside and outside leg to maintenance of curvilinear motion on a natural turf surface

Smith¹,

Dyson²,

Hale³

et al. 2006

Gait & Posture

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Section: Discussionsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 97%

Contributions of the inside and outside leg to maintenance of curvilinear motion on a natural turf surface

Smith¹,

Dyson²,

Hale³

et al. 2006

Gait & Posture

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“…It was already showed that COD enhance lower limb muscle activity when compared with linear sprints [30], which may be related to the substantial lateral forces applied on the ground [31]. Moreover, 90° COD sprints seem to elicit greater EMG muscle activity when compared to lower angle COD such as 45°, probably due to the highest mechanical demands of deceleration and re-acceleration patterns [13].…”

Section: Discussionmentioning

confidence: 99%

Effects of different re-warm up activities in football players' performance

et al. 2017

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Warm up routines are commonly used to optimize football performance and prevent injuries. Yet, official pre-match protocols may require players to passively rest for approximately 10 to 15 minutes between the warm up and the beginning of the match. Therefore, the aim of this study was to explore the effect of different re-warm up activities on the physical performance of football players. Twenty-Two Portuguese elite under-19 football players participated in the study conducted during the competitive season. Different re-warm up protocols were performed 6 minutes after the same standardized warm up in 4 consecutive days in a crossover controlled approach: without, eccentric, plyometric and repeated changes of direction. Vertical jump and Sprint performances were tested immediately after warm up and 12 minutes after warm up. Results showed that repeated changes of direction and plyometrics presented beneficial effects to jump and sprint. Different practical implications may be taken from the eccentric protocol since a vertical jump impairment was observed, suggesting a possibly harmful effect. The absence of re-warm up activities may be detrimental to players’ physical performance. However, the inclusion of re-warm up prior to match is a complex issue, since the manipulation of volume, intensity and recovery may positively or negatively affect the subsequent performance. In fact, this exploratory study shows that eccentric exercise may be harmful for physical performance when performed prior a football match. However, plyometric and repeated changes of direction exercises seem to be simple, quick and efficient activities to attenuate losses in vertical jump and sprint capacity after warm up. Coaches should aim to develop individual optimal exercise modes in order to optimize physical performance after re warm activities.

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“…because of elevated breaking and propelling forces, excessive joint loads, co-contractions, slippery parquet floor); the "rotational demands" placed on the lower extremities (e.g. Schot et al 1995) are indeed expected to be larger the lower the expertise of the subject in this specific exercise mode.…”

Section: Shuttle Run Abilitiesmentioning

confidence: 99%