model of blood glucose kinetics is deuterium-labeled glucose (e.g., [6,6 2 H 2 ]-glucose), whereas for incorporation models [U 13 C]-glucose is commonly the tracer employed (see later). Circulating glucose concentrations are maintained within a relatively tight range, which is a remarkable feat of
Search Results
For Flux Sake: Isotopic Tracer Methods of Monitoring Human Carbohydrate Metabolism During Exercise
Javier T. Gonzalez and Andy J. King
Oxygen Uptake Kinetics in Children and Adolescents: A Review
Neil Armstrong and Alan R. Barker
The pulmonary oxygen uptake (pVO2) kinetic response at the onset of exercise provides a noninvasive window into the metabolic activity of the muscle and a valuable means of increasing our understanding of developmental muscle metabolism. However, to date only limited research has been devoted to investigating the pVO2 kinetic response during exercise in children and adolescents. From the rigorous studies that have been conducted, both age- and sex-related differences have been identified. Specifically, children display a faster exponential rise in the phase II pVO2 kinetics, which are purported to reflect the rise in muscle O2 consumption, during moderate, heavy and very heavy intensity exercise compared with adults. Furthermore, for heavy and very heavy exercise, the O2 cost of exercise is higher for the exponential phase and the magnitude of the pVO2 slow component is smaller in young children. Sex-related differences have been identified during heavy, but not moderate exercise, with prepubertal boys displaying a faster exponential phase II pVO2 kinetic response and a smaller pVO2 slow component compared with prepubertal girls. The mechanisms underlying these differences are currently poorly understood, and form the basis for future research in this area. However, it is hypothesized that an age-related modulation of the muscle phosphate feedback controllers to signal an increased rate of oxidative phosphorylation and/or altered muscle fiber type recruitment strategies have the potential to play an important role. Overall, the data support the view that at the onset of exercise children have an enhanced potential for oxidative metabolism in the myocyte compared with adults.
Patellofemoral Joint Loading During Single-Leg Hopping Exercises
Abbigail Ristow, Matthew Besch, Drew Rutherford, and Thomas W. Kernozek
kinematics and kinetics during single-leg hopping have been examined between those with and without PFP. 25 However, kinetic and kinematic differences have not been explored with a different hopping cadence. The purpose of this study was to observe if there was a difference in PFJ loading variables between
Lower-Extremity Energy Absorption During Side-Step Maneuvers in Females With Knee Valgus Alignment
Akihiro Tamura, Kiyokazu Akasaka, and Takahiro Otsudo
Exerc . 2000 ; 32 ( 4 ): 812 – 819 . PubMed ID: 10776901 doi:10.1097/00005768-200004000-00014 10.1097/00005768-200004000-00014 10776901 12. DeVita P , Skelly WA . Effect of landing stiffness on joint kinetics and energetics in the lower extremity . Med Sci Sports Exerc . 1992 ; 24 ( 1 ): 108
The Effect of Maximalist Running Shoes on Impact Loading: A Critically Appraised Topic
Janice K. Loudon and Marcie Swift
downhill running, the MAX increased instantaneous LR. 5 Arthur and Aminaka 13 compared running kinetics in MAX versus standard running shoes in 16 recreational runners. Of interest to this CAT, IP and LR were not different between trials in the different shoes. The researchers found that the participants
An Experimental Method to Estimate Upper Limbs Inertial Parameters During Handcycling
Ghazaleh Azizpour, Matteo Lancini, Giovanni Incerti, Paolo Gaffurini, and Giovanni Legnani
− L 1 2 − L 2 2 2 L 1 L 2 ) α = atan 2 ( y , x ) − a tan 2 ( L 2 sin ( β ) , L 1 + L 2 cos ( β ) ) . (2) Kinetics By applying standard methodologies similar to those used in robotics, 26 the dynamic equations were written in the following form (see Appendix ): C q ⏟ Joints torque = M s Q
Impact of a Long Run on Injury-Related Biomechanics with Relation to Weekly Mileage in Trained Male Runners
Max R. Paquette and Daniel A. Melcher
the long run. Strike index was unchanged before (15.3 ± 6.3%) and after (14.6 ± 5.8%) the run ( p = .57; d = 0.09). Stance time was also unchanged before (0.25 ± 0.04 s) and after (0.25 ± 0.04 s) the run ( p = .90; d = 0.0). Table 2 Average kinematic and kinetics selected for variables of 5
Isometric Midthigh-Pull Testing: Reliability and Correlation With Key Functional Capacities in Young Soccer Players
Vincenzo Rago, Fábio Yuzo Nakamura, Carlos Suarez-Balsera, Javier Arnaiz-Lastras, and Pedro Figueiredo
, Comfort P , et al . Between-session reliability of isometric midthigh pull kinetics and maximal power clean performance in male youth soccer players . J Strength Cond Res . 2018 ; 32 ( 12 ): 3364 – 3372 . doi: 10.1519/jsc.0000000000001830 5. Lum D , Haff GG , Barbosa TM . The relationship
Within-Session Reliability and Minimum Detectable Differences for Discrete Lower-Extremity Angles and Moments During Walking
Jillian L. Hawkins and Clare E. Milner
gait kinematics and kinetics in healthy adults . Gait Posture . 2012 ; 35 ( 2 ): 301 – 307 . PubMed ID: 22041096 doi:10.1016/j.gaitpost.2011.09.105 10.1016/j.gaitpost.2011.09.105 22041096 3. Hunt MA , Hatfield GL . Ankle and knee biomechanics during normal walking following ankle plantarflexor
Influence of Maturation Status on Eccentric Hamstring Strength Improvements in Youth Male Soccer Players After the Nordic Hamstring Exercise
Benjamin Drury, Thomas Green, Rodrigo Ramirez-Campillo, and Jason Moran
.1111/sms.12128 38. Rumpf MC , Cronin JB , Mohamad IN , Mohamad S , Oliver JL , Hughes MG . The effect of resisted sprint training on maximum sprint kinetics and kinematics in youth . Eur J Sport Sci . 2015 ; 15 ( 5 ): 374 – 381 . PubMed ID: 25190489 doi:10.1080/17461391.2014.955125 10
