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Full-Text Articles in Medical Education
Increasing Vertical Jump Height Using Two Alternative Post-Activation Potentiation Methods, Itzel N. De La Torre, Samuel Montalvo, Daniel Conde, Gabriel Mejia, Sandor Dorgo
Increasing Vertical Jump Height Using Two Alternative Post-Activation Potentiation Methods, Itzel N. De La Torre, Samuel Montalvo, Daniel Conde, Gabriel Mejia, Sandor Dorgo
International Journal of Exercise Science: Conference Proceedings
Post-Activation Potentiation (PAP) is an exercise concept involving maximal muscular contraction to improve subsequent a dynamic contraction. An effective PAP method is one based on a balanced state of physical readiness and fatigue. Fatigued muscles reduce muscle performance. However, non-fatiguing muscular contractions at high loads with short duration can enhance muscle performance. Heart Rate (HR) can be used as an indicator of exercise readiness and fatigue. Additionally Heart Rate Percentage (HR %) was used as an indicator of readiness. PURPOSE: To assess the feasibility of using Heart Rate Percentage (HR%) as a readiness indicator during a back-squat PAP method. …
Can Changes In Running Biomechanics Under Body Weight Support Conditions Lead To Improvements In Aerobic And Anaerobic Energy Capacities?, Shernice A. Thomas, Christopher J. Arellano
Can Changes In Running Biomechanics Under Body Weight Support Conditions Lead To Improvements In Aerobic And Anaerobic Energy Capacities?, Shernice A. Thomas, Christopher J. Arellano
International Journal of Exercise Science: Conference Proceedings
During the ground contact phase of running, muscles in the lower limb are required to generate force to support body weight which is the most energy-demanding task during running. We are interested in understanding how running mechanics change when we reduce the need for body weight support and how these effects determine maximal metabolic power at top speed. PURPOSE: We aim to determine the biomechanical determinants that underlie peak metabolic power during body weight (BW)-supported running. METHODS: Twenty-five healthy young adults (age 18-36, M/F, BMI < 30.0) who are experienced runners will be recruited for this study. Subjects will complete a graded exercise test to determine their peak metabolic power output at 100% BW at 75% BW. During each trial, subjects’ rates of expired oxygen and carbon dioxide, stance and leg swing times, rating of perceived exertion (RPE), and heart rate will be recorded. RESULTS: Our preliminary findings show that similar peak metabolic power output values, at top speeds, …
The Effects Of Two Post-Activation Potentiation Methods On Muscular Activation, Ileana A. Jarquin, Samuel Montalvo, Daniel Conde, Gabriel Ibarra-Mejia, Sandor Dorgo
The Effects Of Two Post-Activation Potentiation Methods On Muscular Activation, Ileana A. Jarquin, Samuel Montalvo, Daniel Conde, Gabriel Ibarra-Mejia, Sandor Dorgo
International Journal of Exercise Science: Conference Proceedings
Post Activation Potentiation (PAP) is an exercise concept based on utilizing a maximal voluntary contraction of the muscles at task to potentiate a dynamic muscular contraction of the same muscles. It is well established that PAP is modulated between performance readiness and muscular fatigue. Heart Rate percentage (HR%) has been used as an indicator of performance readiness and muscular fatigue. PURPOSE: To examine different muscular activation (μV) in response to two different PAP protocols during the vertical jump exercise. METHODS: 8 participants (5 males and 3 females; mean ± SD: Age = 22.6 ± 1.76 years; Height …
Running Economy Strongly Related To Ground Contact Time Imbalances, Aaron D. Piper, Erica G. Knowles, Nicholas A. Guerra, Eric J. Jones, Dustin P. Joubert
Running Economy Strongly Related To Ground Contact Time Imbalances, Aaron D. Piper, Erica G. Knowles, Nicholas A. Guerra, Eric J. Jones, Dustin P. Joubert
International Journal of Exercise Science: Conference Proceedings
Running economy (RE) can be defined as the oxygen consumption or caloric unit cost required to move at a specific velocity. In addition to a runner’s maximal oxygen uptake (VO2max) and lactate threshold (LT), RE is a key endurance performance determinant. Better RE is advantageous as it represents the ability to run at a lower relative percentage of VO2max at a given speed and reduces the rate of energy depletion. Ground contact time (GCT) has been associated with RE, however it has not been established how GCT imbalances between feet impact economy. Purpose: Determine the relationship between cadence, GCT, and …
Kinematic Comparison Of Underwater Dolphin And Flutter Kicking Performed In A Prone And Supine Body Position, Peter Robinson, Taylor L. Adams, Kali Rose, Mickey B. Scharbrough, Scott P. Mclean
Kinematic Comparison Of Underwater Dolphin And Flutter Kicking Performed In A Prone And Supine Body Position, Peter Robinson, Taylor L. Adams, Kali Rose, Mickey B. Scharbrough, Scott P. Mclean
International Journal of Exercise Science: Conference Proceedings
Despite an increasing emphasis on underwater dolphin kicking in competitive swimming, little objective research exists to explain its preference over flutter kicking. PURPOSE: To examine kinematic characteristics of flutter and dolphin kicking performed in prone and supine body positions. METHODS: Ten collegiate swimmers (1.77±0.07 m, 72.4±7.6 kg, 19.8±1.0 yrs) experienced with dolphin and flutter kicking completed eight 10 m maximal effort underwater kicking trials. Body position and kicking style were randomly varied between trials such that half of all trials were performed using each kicking style and each body position. A calibrated underwater camera was used to record …
3-Dimensional Biomechanical Comparison Of Spinal Posture In Yoga Practitioners And Non-Practitioners During A Seated And Standing Position, Savannah V. Wooten
3-Dimensional Biomechanical Comparison Of Spinal Posture In Yoga Practitioners And Non-Practitioners During A Seated And Standing Position, Savannah V. Wooten
International Journal of Exercise Science: Conference Proceedings
Yoga has been claimed to be beneficial for helping a series of clinical populations and improving ailments such as, but not limited to, stress, chronic back pain, muscle endurance, flexibility, balance, and posture. Whereas many of the above listed assertions have been scientifically investigated, there is a lack of objective evidence that supports the claim that yoga improves posture. PURPOSE: The purpose of this study is to compare a 3-D biomechanical analysis of spinal posture among yoga practitioners (YP) and Non yoga practitioners (NP) during seated and standing positions. METHODS: 10 yoga practitioners (M= 3, F=7) and 10 …
Exploiting Arm Swinging Dynamics To Reduce The Metabolic Cost Of Walking While Carrying Loads, Obioma B. Mcreynolds, Christopher J. Arellano
Exploiting Arm Swinging Dynamics To Reduce The Metabolic Cost Of Walking While Carrying Loads, Obioma B. Mcreynolds, Christopher J. Arellano
International Journal of Exercise Science: Conference Proceedings
Arm swing while walking at one’s optimal speed is primarily driven by passive pendulum mechanics, an energy saving mechanism that has been speculated to incur little to no metabolic cost. PURPOSE: In line with this idea, we set out to determine whether carrying loads on the swinging and non-swinging arms while walking would be less costly than carrying loads at other locations on the body. We hypothesized that carrying loads on the arms while restricted from swinging would demand a greater metabolic cost than carrying loads on the arms while naturally swinging. For relative comparisons, we also explored the cost …
What Determines The Metabolic Cost Of Human Running Across A Wide Range Of Velocities?, Shalaya Kipp, Alena Marie Grabowski, Rodger Kram
What Determines The Metabolic Cost Of Human Running Across A Wide Range Of Velocities?, Shalaya Kipp, Alena Marie Grabowski, Rodger Kram
International Journal of Exercise Science: Conference Proceedings
The cost of generating force hypothesis proposes that the metabolic rate during running is determined by the rate of muscle force development (1/tc, tc=contact time) and volume of active leg muscle. A previous study assumed a constant recruited muscle volume and reported that the rate of force development alone explains ~70% of the increase in metabolic rate for human runners across a moderate velocity range (2-4 m s-1). PURPOSE: We performed a more systematic analysis of the effective mechanical advantage (EMA) of the lower leg over a wide velocity range to determine if …
The Influence Of Proximal Versus Distal Strength On Balance Control In Athletes Versus Non-Athletes, I. Chahal, M. Meyers, E. Casto, J. Mccrory
The Influence Of Proximal Versus Distal Strength On Balance Control In Athletes Versus Non-Athletes, I. Chahal, M. Meyers, E. Casto, J. Mccrory
International Journal of Exercise Science: Conference Proceedings
Please see the pdf version of the abstract.