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https://www.readbyqxmd.com/read/27908792/freebie-rhabdomyolysis-a-public-health-concern-spin-class-induced-rhabdomyolysis-case-reports-and-review-of-literature
#1
Maureen Brogan, Rudrick Ledesma, Alan Coffino, Praveen N Chander
BACKGROUND: Rhabdomyolysis is a pathologic condition in which intracellular muscle constituents leak into the blood circulation. It is usually caused by muscle trauma. "Spinning" is an indoor form of cycling where participants use a special stationary exercise bicycle with a weighted flywheel and undergo high intensity cycling classes focusing on endurance. There have been several case reports in the literature of exertional rhabdomyolysis following spin class. METHODS: Our nephrology practices have diagnosed a number of cases of symptomatic patients presenting to our emergency departments following their first spin classes, with histories and creatinine phosphokinase levels diagnostic of exertional rhabdomyolysis...
November 28, 2016: American Journal of Medicine
https://www.readbyqxmd.com/read/27705034/the-high-pull-exercise-a-comparison-between-a-versapulley-flywheel-device-and-the-free-weight
#2
F Javier Núñez, Luis J Suarez-Arrones, Paul Cater, Alberto Mendez-Villanueva
The aim of this study was to examine the kinematics and kinetics (force, velocity and acceleration) and blood lactate concentration of the Versapulley (VP) device in comparison with free weight (FW) exercise at a similar external load. Fifteen rugby players randomly performed two training sessions of 6 sets of 6 repetitions with 20 s of recovery in between sets of the high pull exercise with the VP and the FW. Both training sessions were separated by 72 h. Barbell displacement (cm.), peak velocity (m/s), peak acceleration (m/s(2)), mean propulsive velocity (m/s), mean propulsive acceleration (m/s(2)), propulsive phase (%), mean and maximal force (Newtons) were continuously recorded during each repetition...
September 6, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27669183/effects-of-inertial-setting-on-power-force-work-and-eccentric-overload-during-flywheel-resistance-exercise-in-women-and-men
#3
Luis Manuel Martinez-Aranda, Rodrigo Fernandez-Gonzalo
Exercise load is a key component in determining end-point adaptations to resistance exercise. Yet, there is no information regarding the use of different inertia (i.e. loads) during iso-inertial flywheel resistance exercise, a very popular high-intensity training model. Thus, this study examined power, work, force and eccentric-overload produced during flywheel resistance exercise with different inertial settings in men and women. Twenty-two women (n=11) and men (n=11) performed unilateral (in both legs) isolated concentric (CON) and coupled CON and eccentric (ECC) exercise in a flywheel knee extension device employing six inertias (0...
September 16, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27618131/the-high-pull-exercise-a-comparison-between-a-versapulley-flywheel-device-and-the-free-weight
#4
F Javier Núñez, Luis J Suarez-Arrones, Paul Cater, Alberto Mendez-Villanueva
The aim of this study was to examine the kinematics and kinetics (force, velocity and acceleration) and blood lactate concentration of the Versapulley (VP) device in comparison with free weight (FW) exercise at a similar external load. Fifteen rugby players randomly performed two training sessions of 6 sets of 6 repetitions with 20 s of recovery in between sets of the high pull exercise with the VP and the FW. Both training sessions were separated by 72 h. Barbell displacement (cm.), peak velocity (m/s), peak acceleration (m/s2), mean propulsive velocity (m/s), mean propulsive acceleration (m/s2), propulsive phase (%), mean and maximal force (Newtons) were continuously recorded during each repetition...
September 6, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27583444/mri-based-regional-muscle-use-during-hamstring-strengthening-exercises-in-elite-soccer-players
#5
Alberto Mendez-Villanueva, Luis Suarez-Arrones, Gil Rodas, Rodrigo Fernandez-Gonzalo, Per Tesch, Richard Linnehan, Richard Kreider, Valter Di Salvo
The present study examined site-specific hamstring muscles use with functional magnetic resonance imaging (MRI) in elite soccer players during strength training. Thirty-six players were randomized into four groups, each performing either Nordic hamstring, flywheel leg-curl, Russian belt or the hip-extension conic-pulley exercise. The transverse relaxation time (T2) shift from pre- to post-MRI were calculated for the biceps femoris long (BFl) and short (BFs) heads, semitendinosus (ST) and semimembranosus (SM) muscles at proximal, middle and distal areas of the muscle length...
2016: PloS One
https://www.readbyqxmd.com/read/27457914/impact-of-inertial-training-on-strength-and-power-performance-in-young-active-men
#6
Mariusz Naczk, Alicja Naczk, Wioletta Brzenczek-Owczarzak, Jarosław Arlet, Zdzisław Adach
Naczk, M, Naczk, A, Brzenczek-Owczarzak, W, Arlet, J, and Adach, Z. Impact of inertial training on strength and power performance in young active men. J Strength Cond Res 30(8): 2107-2113, 2016-This study evaluated how 5 weeks of inertial training using 2 different loads influenced strength and power performance. Fifty-eight male physical education students were randomly divided into training and control groups. The 2 training groups (T0 and T10) performed inertial training 3 times per week for 5 weeks using the new Inertial Training and Measurement System (ITMS)...
August 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27233772/-it-just-has-to-click-internists-views-of-what-constitutes-productive-interactions-with-chronically-ill-patients
#7
N M H Kromme, C T B Ahaus, R O B Gans, H B M van de Wiel
BACKGROUND: According to the Chronic Care Model, productive interactions are crucial to patient outcomes. Despite productive interactions being at the heart of the Model, however, it is unclear what constitutes such an interaction. The aim of this study was to gain a better understanding of physician views of productive interactions with the chronically ill. METHOD: We conducted a qualitative study and interviewed 20 internists working in an academic hospital. The data were analyzed using a constructivist approach of grounded theory...
2016: BMC Health Services Research
https://www.readbyqxmd.com/read/27131676/flywheel-induction-motor-generator-for-magnet-power-supply-in-small-fusion-device
#8
S Hatakeyma, F Yoshino, H Tsutsui, S Tsuji-Iio
A flywheel motor-generator (MG) for the toroidal field (TF) coils of a small fusion device was developed which utilizes a commercially available squirrel-cage induction motor. Advantages of the MG are comparably-long duration, quick power response, and easy implementation of power control compared with conventional capacitor-type power supply. A 55-kW MG was fabricated, and TF coils of a small fusion device were energized. The duration of the current flat-top was extended to 1 s which is much longer than those of conventional small devices (around 10-100 ms)...
April 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27116347/individual-muscle-use-in-hamstring-exercises-by-soccer-players-assessed-using-functional-mri
#9
R Fernandez-Gonzalo, P A Tesch, R M Linnehan, R B Kreider, V Di Salvo, L Suarez-Arrones, X Alomar, A Mendez-Villanueva, G Rodas
This study used functional magnetic resonance imaging (fMRI) to compare individual muscle use in exercises aimed at preventing hamstring injuries. Thirty-six professional soccer players were randomized into 4 groups, each performing either Nordic hamstring, flywheel leg curl, Russian belt or conic-pulley exercise. MRIs were performed before and immediately after a bout of 4 sets of 8 repetitions. Pre-post exercise differences in contrast shift (T2) were analyzed for the long (BFLh) and short head (BFSh) of biceps femoris, semitendinosus (ST), semimembranosus (SM) and gracilis (GR) muscles...
June 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27088482/damage-resistant-composites-using-electrospun-nanofibers-a-multiscale-analysis-of-the-toughening-mechanisms
#10
Lode Daelemans, Sam van der Heijden, Ives De Baere, Hubert Rahier, Wim Van Paepegem, Karen De Clerck
Today, fiber-reinforced polymer composites are a standard material in applications where a high stiffness and strength are required at minimal weight, such as aerospace structures, ultralight vehicles, or even flywheels for highly efficient power storage systems. Although fiber-reinforced polymer composites show many advantages compared to other materials, delamination between reinforcing plies remains a major problem limiting further breakthrough. Traditional solutions that have been proposed to toughen the interlaminar region between reinforcing plies have already reached their limit or have important disadvantages such as a high cost or the need for adapted production processes...
May 11, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27052303/muscle-functional-and-cognitive-adaptations-after-flywheel-resistance-training-in-stroke-patients-a-pilot-randomized-controlled-trial
#11
RANDOMIZED CONTROLLED TRIAL
Rodrigo Fernandez-Gonzalo, Sol Fernandez-Gonzalo, Marc Turon, Cristina Prieto, Per A Tesch, Maria del Carmen García-Carreira
BACKGROUND: Resistance exercise (RE) improves neuromuscular function and physical performance after stroke. Yet, the effects of RE emphasizing eccentric (ECC; lengthening) actions on muscle hypertrophy and cognitive function in stroke patients are currently unknown. Thus, this study explored the effects of ECC-overload RE training on skeletal muscle size and function, and cognitive performance in individuals with stroke. METHODS: Thirty-two individuals with chronic stroke (≥6 months post-stroke) were randomly assigned into a training group (TG; n = 16) performing ECC-overload flywheel RE of the more-affected lower limb (12 weeks, 2 times/week; 4 sets of 7 maximal closed-chain knee extensions; <2 min of contractile activity per session) or a control group (CG; n = 16), maintaining daily routines...
April 6, 2016: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/26893030/wise-2005-aerobic-and-resistive-countermeasures-prevent-paraspinal-muscle-deconditioning-during-60-day-bed-rest-in-women
#12
Jacquelyn A Holt, Brandon R Macias, Suzanne M Schneider, Donald E Watenpaugh, Stuart M C Lee, Douglas G Chang, Alan R Hargens
Microgravity-induced lumbar paraspinal muscle deconditioning may contribute to back pain commonly experienced by astronauts and may increase the risk of postflight injury. We hypothesized that a combined resistive and aerobic exercise countermeasure protocol that included spinal loading would mitigate lumbar paraspinal muscle deconditioning during 60 days of bed rest in women. Sixteen women underwent 60-day, 6° head-down-tilt bed rest (BR) and were randomized into control and exercise groups. During bed rest the control group performed no exercise...
May 15, 2016: Journal of Applied Physiology
https://www.readbyqxmd.com/read/26863657/frequency-comparison-of-formula-see-text-ion-optical-clocks-at-ptb-and-npl-via-gps-ppp
#13
J Leute, N Huntemann, B Lipphardt, Christian Tamm, P B R Nisbet-Jones, S A King, R M Godun, J M Jones, H S Margolis, P B Whibberley, A Wallin, M Merimaa, P Gill, E Peik
We used precise point positioning, a well-established GPS carrier-phase frequency transfer method to perform a direct remote comparison of two optical frequency standards based on single laser-cooled [Formula: see text] ions operated at the National Physical Laboratory (NPL), U.K. and the Physikalisch-Technische Bundesanstalt (PTB), Germany. At both institutes, an active hydrogen maser serves as a flywheel oscillator which is connected to a GPS receiver as an external frequency reference and compared simultaneously to a realization of the unperturbed frequency of the (2)S1/2(F=0)-(2)D3/2(F=2) electric quadrupole transition in [Formula: see text] via an optical femtosecond frequency comb...
July 2016: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/26802373/exercise-responses-to-gravity-independent-flywheel-aerobic-and-resistance-training
#14
Tomasz Owerkowicz, Joshua A Cotter, Fadia Haddad, Alvin M Yu, Marinelle L Camilon, Theresa N Hoang, Daniel J Jimenez, Arthur Kreitenberg, Per A Tesch, Vincent J Caiozzo, Gregory R Adams
BACKGROUND: Although several exercise systems have been developed to mitigate the physiological deconditioning that occurs in microgravity, few have the capacity to positively impact multiple physiological systems and still meet the volume/mass requirements needed for missions beyond low Earth orbit. The purpose of this study was to test the gravity-independent Multi-Mode Exercise Device (M-MED) for both resistance (RE) and aerobic (AE) training stimuli. METHODS: Eight men and nine women (mean age 22...
February 2016: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/26671347/muscle-damage-and-repeated-bout-effect-induced-by-enhanced-eccentric-squat-exercise
#15
G Coratella, A Chemello, F Schena
AIM: Muscle damage and repeated bout effect have been studied after pure eccentric-only exercise. The aim of this study was to evaluate muscle damage and repeated bout effect induced by enhanced-eccentric squat exercise using flywheel device. METHODS: Thirteen healthy males volunteered for this study. Creatine-kinase blood activity (CK), quadriceps isometric peak torque and muscle soreness were used as markers of muscle damage. The dependent parameters were measured at baseline, immediately after and each day up to 96 hours after the exercise session...
November 27, 2015: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/26670989/effects-of-in-season-inertial-resistance-training-with-eccentric-overload-in-a-sports-population-at-risk-for-patellar-tendinopathy
#16
Gabriel Gual, Azahara Fort-Vanmeerhaeghe, Daniel Romero-Rodríguez, Per A Tesch
Gual, G, Fort-Vanmeerhaeghe, A, Romero-Rodríguez, D, and Tesch, PA. Effects of in-season inertial resistance training with eccentric overload in a sports population at risk for patellar tendinopathy. J Strength Cond Res 30(7): 1834-1842, 2016-Volleyball and basketball players can be considered as a population at risk for patellar tendinopathy. Given the paradox that eccentric training elicits therapeutic benefits yet might provoke such injury, we investigated the influence of a weekly bout of inertial squat resistance exercise offering eccentric overload on lower limb muscle power and patellar tendon complaints...
July 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/26628183/note-a-kinematic-shaker-system-for-high-amplitude-low-frequency-vibration-testing
#17
Anand Swaminathan, Matthew E Poese, Robert W M Smith, Steven L Garrett
This note describes a shaker system capable of high peak-velocity, large amplitude, low frequency, near-sinusoidal excitation that has been constructed and employed in experiments on the inhibition of Rayleigh-Bénard convection using acceleration modulation. The production of high peak-velocity vibration is of interest in parametric excitation problems of this type and reaches beyond the capabilities of standard electromagnetic shakers. The shaker system described employs a kinematic linkage to two counter-rotating flywheels, driven by a variable-speed electrical motor, producing peak-to-peak displacements of 15...
November 2015: Review of Scientific Instruments
https://www.readbyqxmd.com/read/26565019/no-reserve-in-isokinetic-cycling-power-at-intolerance-during-ramp-incremental-exercise-in-endurance-trained-men
#18
Carrie Ferguson, Lindsey A Wylde, Alan P Benson, Daniel T Cannon, Harry B Rossiter
During whole body exercise in health, maximal oxygen uptake (V̇o2max) is typically attained at or immediately before the limit of tolerance (LoT). At the V̇o2max and LoT of incremental exercise, a fundamental, but unresolved, question is whether maximal evocable power can be increased above the task requirement, i.e., whether there is a "power reserve" at the LoT. Using an instantaneous switch from cadence-independent (hyperbolic) to isokinetic cycle ergometry, we determined maximal evocable power at the limit of ramp-incremental exercise...
January 1, 2016: Journal of Applied Physiology
https://www.readbyqxmd.com/read/26557200/effects-of-traditional-versus-horizontal-inertial-flywheel-power-training-on-common-sport-related-tasks
#19
Moisés de Hoyo, Borja Sañudo, Luis Carrasco, Sergio Domínguez-Cobo, Jesús Mateo-Cortes, María Monserrat Cadenas-Sánchez, Sophia Nimphius
This study aimed to analyze the effects of power training using traditional vertical resistance exercises versus direction specific horizontal inertial flywheel training on performance in common sport-related tasks. Twenty-three healthy and physically active males (age: 22.29 ± 2.45 years) volunteered to participate in this study. Participants were allocated into either the traditional training (TT) group where the half squat exercise on a smith machine was applied or the horizontal flywheel training (HFT) group performing the front step exercise with an inertial flywheel...
September 29, 2015: Journal of Human Kinetics
https://www.readbyqxmd.com/read/26349042/neuromuscular-fatigue-and-physiological-responses-after-five-dynamic-squat-exercise-protocols
#20
Christian Raeder, Thimo Wiewelhove, Marc P Westphal-Martinez, Jaime Fernandez-Fernandez, Rauno A de Paula Simola, Michael Kellmann, Tim Meyer, Mark Pfeiffer, Alexander Ferrauti
This aimed to analyze neuromuscular, physiological and perceptual responses to a single bout of 5 different dynamic squat exercise protocols. In a randomized and counterbalanced order, 15 male resistance-trained athletes (mean ± SD; age: 23.1 ± 1.9 years, body mass: 77.4 ± 8.0 kg) completed traditional multiple sets (MS: 4 × 6, 85% 1 repetition maximum [RM]), drop sets (DS: 1 × 6, 85% 1RM + 3 drop sets), eccentric overload (EO: 4 × 6, 70% 1RM concentric, 100% 1RM eccentric), flywheel YoYo squat (FW: 4 × 6, all-out), and a plyometric jump protocol (PJ: 4 × 15, all-out)...
April 2016: Journal of Strength and Conditioning Research
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