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Full-Text Articles in Physiology
Biomechanical And Proprioceptive Differences During Drop Landings Between Dancers And Non-Dancers, Katie E. Volkerding, Caroline J. Ketcham Ph.D.
Biomechanical And Proprioceptive Differences During Drop Landings Between Dancers And Non-Dancers, Katie E. Volkerding, Caroline J. Ketcham Ph.D.
International Journal of Exercise Science
International Journal of Exercise Science 6(4) : 289-299, 2013. The focus of this research was to determine if female dancers have differing kinematic and kinetic characteristics when landing from three heights (0.2, 0.5, and 0.8 m) both with and without vision compared to non-dancers. It was hypothesized that dancers would show differing kinematic and kinetic patterns of control due to their increased proprioceptive awareness. Eight collegiate dancers and seven collegiate controls who were neither dancers nor collegiate jumping athletes volunteered for this study. Sagittal plane lower limb joint angles were measured at 100 Hz prior to landing through stability with …
Comparisons Between Swing Phase Characteristics Of Race Walkers And Distance Runners, Laura C. Smith, Brian Hanley
Comparisons Between Swing Phase Characteristics Of Race Walkers And Distance Runners, Laura C. Smith, Brian Hanley
International Journal of Exercise Science
International Journal of Exercise Science 6(4) : 269-277, 2013. The aim of this study was to analyze swing characteristics during race walking and to compare these with distance running. The rules of race walking demand that no visible flight time should occur and the stance leg must be straightened from initial contact to midstance. Previous research has not examined whether these rules also have an effect on swing and what consequences might arise. Ten male race walkers and ten male distance runners walked or ran respectively on an instrumented treadmill for 10 km with two in-dwelling force plates. Trials lasted …
Activity-Specific Effects Of Fatigue Protocols May Influence Landing Kinematics: A Pilot Study, Adrian Chavez, Duane Knudson, Rod Harter, Kevin Mccurdy
Activity-Specific Effects Of Fatigue Protocols May Influence Landing Kinematics: A Pilot Study, Adrian Chavez, Duane Knudson, Rod Harter, Kevin Mccurdy
International Journal of Exercise Science
International Journal of Exercise Science 6(3) : 242-249, 2013. Fatigue is a common neuromuscular factor examined in relation to risk of ACL injury. Unfortunately, variations between the protocols used to induce fatigue in studies examining this phenomenon may have contributed to reported inconsistencies in the effects of fatigue on movements with high-risk of ACL injury. In addition, the ecological validity of fatigue experienced as a result of protocols commonly administered in the experimental setting is unclear. The purpose of this study was to examine the ecological validity, using basketball competition as the criterion measure, of two fatigue protocols commonly used …
Effects Of Foot Position During Squatting On The Quadriceps Femoris: An Electromyographic Study, Nicholas G. Murray, Daniel Cipriani, Denise O'Rand, Rebecca Reed-Jones
Effects Of Foot Position During Squatting On The Quadriceps Femoris: An Electromyographic Study, Nicholas G. Murray, Daniel Cipriani, Denise O'Rand, Rebecca Reed-Jones
International Journal of Exercise Science
International Journal of Exercise Science 6(2) : 114-125, 2013. Weightlifters have commonly believed that changing joint position can alter specific muscle activation. The magnitude of force produced by a muscle is highly dependent upon the length of the muscle. The purpose of this study was to determine the effect of foot positioning on muscle activation of the superficial quadriceps as measured by surface electromyography (sEMG) during a functional squatting movement in healthy adults. Twenty physically active asymptomatic adults (7 females and 13 males) were included in the study while four different foot positions (Neutral, Internally Rotated, Externally Rotated, and Staggered) …
Variations In Running Technique Between Female Sprinters, Middle, And Distance Runners, Ruthann Cunningham, Iain Hunter, Matthew K. Seeley, Brent Feland
Variations In Running Technique Between Female Sprinters, Middle, And Distance Runners, Ruthann Cunningham, Iain Hunter, Matthew K. Seeley, Brent Feland
International Journal of Exercise Science
International Journal of Exercise Science 6(1) : 43-51, 2013. In the sport of track and field, runners excel not only due to physiological characteristics but also aspects in running technique. Optimal technique allows runners the perfect the balance between running speed and economy. The ideal movement pattern may vary between events as the goal goes from economy of movement in the long-distance events to speed and power in the sprints. Understanding how each type of runner moves differently will help coaches more effectively train their athletes for each specific running event. This study was conducted to determine if sprinters, middle-distance, …