Barefoot or minimal footwear running is currently a highly debated topic among runners and researchers. Several companies have developed to simulate barefoot but few studies compared shoes during running. The primary goal of this study was compare acute changes in three-dimensional (3D) ground reaction forces (GRFs) lower limb kinematics kinetics habitually shod rearfoot strike (RFS) forefoot (FFS) between (MSH), neutral cushion (SH). Lower extremity joint biomechanical variables RFS FFS...

Abstract Background Flip‐flops and sandals are popular choices of footwear due to their convenience. However, the effects these types on lower extremity biomechanics still poorly understood. Therefore, objective this study was investigate differences in ground reaction force (GRF), center pressure (COP) joint kinematic kinetic variables during level‐walking flip‐flops, barefoot compared running shoes. Methods Ten healthy males performed five walking trials four conditions at 1.3 m/s....

Background Quantifying total running distance is valuable, as it comprises some aspects of the mechanical/neuromuscular, cardiovascular, and perceptual/psychological loads that contribute to training stress partially predictive distance-running success. However, only one aspect contributing stress. Clinical Question The purpose this commentary highlight (1) problems with using quantify stress, (2) importance alternative approaches monitor (3) moderating factors (effect-measure modifiers)...

ABSTRACT Conflicting methodologies are used to define certain countermovement vertical jump (CMVJ) phases, which limits the identification of performance-enhancing factors (e.g., rate force development). Purpose We (a) utilized a joint power approach CMVJ phases that accurately describe body weight unloading (i.e., unweighting) and eccentric braking) actions, were combined with robustly defined concentric propulsion) phase, (b) determined whether can be identified using only ground reaction...

ABSTRACT “Super-shoes” are designed to improve endurance running performance by reducing the metabolic demands of running. Although research on “super-shoes” is still developing and has mostly been studied in male runners, it not clear how possible mediating factors, such as foot strike pattern, influence cost joint mechanics competitive female runners. Purpose The objective this study assess runners understand pattern may footwear effects. Methods Eighteen ran four 5-min bouts a force...

Abstract The purpose of this study was to investigate the interaction foot strike and common speeds on sagittal plane ankle knee joint kinetics in competitive rear (RFS) runners when running with a RFS pattern an imposed forefoot (FFS) pattern. Sixteen habitual male ran at two different (i.e. 8 6 min mile −1 ) using their FFS A repeated measures analysis variance used assess potential between speed for selected ground reaction force (GRF) variables and, kinematic kinetic variables. No...

Increased step widths have been shown to reduce peak internal knee abduction moments in healthy individuals but not osteoarthritis patients during stair descent. This study aimed assess effects of increased on and associated variables adults with medial older ascent. Thirteen 13 performed ascent using preferred, wide, wider widths. Three-dimensional kinematics ground reaction forces (GRFs) an instrumented staircase were collected. width reduced first second moments, moment impulse. In...

This study sought to identify kinetic and electromyographic subphase characteristics distinguishing good from poor jumpers during countermovement vertical jumps (CMVJs), as defined by the reactive strength index (RSI, CMVJ displacement divided jump time; cutoff = 0.46 m·s-1). A total of 15 men (1.8 [0.6] m, 84.5 [8.5] kg, 24 [2] y) were stratified RSI into (n 6; 0.57 [0.07] m·s-1) 9; 0.39 [0.06] performance groups. The following variables compared between groups using independent t tests (α...

Foot strike pattern and movement variability have each been associated with running injuries. contact angle ( FCA ) is a common measure of pattern. Thus, in could be an important injury risk factor. The purposes this study were to compare (a) foot its between runners without history and, (b) habitual rearfoot RFS non‐ during prolonged run. Twenty‐three 21 participated. Motion capture was used collect kinematic data 40 min treadmill Average compared groups among four time points. not...

Caia, J, Weiss, LW, Chiu, LZF, Schilling, BK, Paquette, MR, and Relyea, GE. Do lower-body dimensions body composition explain vertical jump ability? J Strength Cond Res 30(11): 3073-3083, 2016-Vertical (VJ) capability is integral to the level of success attained by individuals participating in numerous sport physical activities. Knowledge factors related performance may help with talent identification and/or optimizing training prescription. Although myriad variables are likely VJ, this...

Research has focused on the effects of acute strike pattern modifications lower extremity joint stiffness and running economy (RE). Strike biomechanics have mostly been studied while runners complete short bouts. This study examined an imposed forefoot (FFS) RE ankle knee before after a long run in habitual rearfoot (RFS) runners. Joint kinetics were collected run. Sagittal computed from kinematic ground reaction force data that during over-ground trials 13 male was measured treadmill...

Toe-in (TI) and toe-in with wider step width (TIW) gait modifications have successfully reduced the internal peak knee adduction moment (KAM) during level walking stair ascent tasks, respectively, for healthy osteoarthritis populations. However, concurrent effects of these not previously been combined to reduce both first second KAM or tested among different alignment groups. Therefore, purpose this study was examine TI TIW on biomechanics in individuals varus, neutral, valgus...

The purpose of this investigation was to examine the effects footwear on kinetics and lower extremity electromyographic (EMG) activity during vertical jump (VJ) standing long jump. Fifteen men performed 2 types in 3 conditions: barefoot, minimal shoes, cross-training shoes. Jump displacement kinetic data were collected, along with EMG biceps femoris, medial gastrocnemius, peroneus longus, semitendinosus/semimembranosus, soleus (SOL), tibialis anterior, vastus lateralis, medialis. Subjective...

Korak, JA, Paquette, MR, Fuller, DK, Caputo, JL, and Coons, JM. Muscle activation patterns of lower-body musculature among 3 traditional exercises in trained women. J Strength Cond Res 32(10): 2770-2775, 2018-The deadlift back front squats are common multijoint, resistance that target similar musculature. To our knowledge, muscle activity measured using surface electromyography has never been analyzed these exercises. Furthermore, most literature examining this topic included male...