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https://www.readbyqxmd.com/read/28538317/effects-of-inertial-setting-on-power-force-work-and-eccentric-overload-during-flywheel-resistance-exercise-in-women-and-men
#1
Luis M Martinez-Aranda, Rodrigo Fernandez-Gonzalo
Martinez-Aranda, LM and Fernandez-Gonzalo, R. Effects of inertial setting on power, force, work and eccentric overload during flywheel resistance exercise in women and men. J Strength Cond Res 31(6): 1653-1661, 2017-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 isoinertial 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...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28516252/chronic-eccentric-arm-cycling-improves-maximum-upper-body-strength-and-power
#2
Steven J Elmer, Dakota J Anderson, Travis R Wakeham, Matthew A Kilgas, John J Durocher, Stan L Lindstedt, Paul C LaStayo
INTRODUCTION: Eccentric leg cycling (cycle ergometry adapted to impose muscle lengthening contractions) offers an effective exercise for restoring lower-body muscular function, maintaining health, and improving performance in clinical and athletic populations. PURPOSE: We extended this model to the upper body and evaluated the effectiveness of a 7-week eccentric arm cycling (ECCarm) intervention to improve upper-body muscular function. We also explored whether ECCarm would alter arterial function...
May 17, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28459360/strength-training-for-middle-and-long-distance-performance-a-meta-analysis
#3
Nicolas Berryman, Inigo Mujika, Denis Arvisais, Marie Roubeix, Carl Binet, Laurent Bosquet
PURPOSE: The objective of this study was to assess the net effects of strength training on middle- and long-distance performance through a meta-analysis of the available literature. METHODS: Three databases were searched from which 28 out of 554 potential studies met all inclusion criteria. Standardized mean differences (SMDs) were calculated and weighted by the inverse of variance to calculate an overall effect and its 95% confidence interval (CI). Subgroup analyses were conducted to determine whether the strength-training intensity, duration and frequency, and population performance level, age, sex and sport were outcomes that may influence the magnitude of the effect...
May 1, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28445231/the-effects-of-multi-day-vs-single-pre-exercise-nitrate-supplement-dosing-on-simulated-cycling-time-trial-performance-and-skeletal-muscle-oxygenation
#4
Edward Jo, Michelle Fischer, Alexandra T Auslander, Alan Beigarten, Bruce Daggy, Ken Hansen, Lisa Kessler, Adam Osmond, Hong Wang, Rachel Wes
A transient augmentation in the metabolic efficiency of skeletal muscle is the purported basis for dietary nitrate supplementation amongst competitive and recreational athletes alike. Previous studies support the ergogenic effects of nitrate supplementation as findings indicated improved microvascular blood flow, exercise economy, and performance with relatively short-term supplementation. As with most ergogenic aids, the optimum duration of supplementation prior to performance or competition, i.e. loading phase, is a critical determinant for efficacy...
April 18, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28441760/supplementation-with-a-polyphenol-rich-extract-perfload-%C3%A2-improves-physical-performance-during-high-intensity-exercise-a-randomized-double-blind-crossover-trial
#5
Julien Cases, Cindy Romain, Cristian Marín-Pagán, Linda H Chung, José Miguel Rubio-Pérez, Caroline Laurent, Sylvie Gaillet, Emmanuelle Prost-Camus, Michel Prost, Pedro E Alcaraz
Workout capacity is energy-production driven. To produce peak metabolic power outputs, the organism predominantly relies more on anaerobic metabolism, but this undoubtedly has a negative and limiting impact on muscle function and performance. The aim of the study was to evaluate if an innovative polyphenol-based food supplement, PerfLoad(®), was able to improve metabolic homeostasis and physical performance during high-intensity exercises under anaerobic conditions. The effect of a supplementation has been investigated on fifteen recreationally-active male athletes during a randomized, double-blind and crossover clinical investigation...
April 24, 2017: Nutrients
https://www.readbyqxmd.com/read/28422557/maximal-aerobic-power-in-aging-men-insights-from-1-hour-cycling-unaccompanied-record
#6
Carlo Capelli
PURPOSE: We analyzed best 1-hour unaccompanied performances of Master athletes in ages ranging from 35 to 105 years in order to estimate the decay of Maximal Aerobic Power (MAP) across the spectrum of age. METHODS: MAP at the various ages was estimated by computing the metabolic power ( RESULTS: MAP started monotonically decreasing at 47 years of age. Thereafter, it showed an average percent rate of decrease of about 14 % for decade up to 105 years of age, similarly to other classes of Master athletes...
April 19, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28422523/can-the-lamberts-submaximal-cycle-test-reflect-overreaching-in-professional-cyclists
#7
Lieselot Decroix, Robert P Lamberts, Romain Meeusen
PURPOSE: The Lamberts and Lambert Submaximal Cycle Test (LSCT) consists of 3 stages during which cyclist's cycle for 6 minutes at 60%, 6 minutes at 80% and 3 minutes at 90% of their maximal heart rate, followed by one-minute recovery. It was the aim of this study to determine if the LSCT is able to reflect a state of functional overreaching in professional female cyclists during an 8-day training camp and the following recovery days. METHODS: Six professional female cyclists performed an LSCT on day 1, day 5 and day 8 of the training camp and 3 days after the training camp...
April 19, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28422520/low-level-laser-therapy-improves-performance-and-reduces-fatigue-in-competitive-cyclists
#8
Fábio J Lanferdini, Rodrigo R Bini, Bruno M Baroni, Kelli D Klein, Felipe P Carpes, Marco A Vaz
Evidence supports that low-level laser therapy (LLLT) minimizes fatigue effects on muscle performance. However, the ideal LLLT dosage to improve athletes' performance during sports activities, such as cycling, is still unclear. Therefore, the goal of this study was to investigate the effects of different LLLT dosages on cyclists' performance in time-to-exhaustion tests. In addition, we looked at the effects of LLLT on the frequency content of the EMG signals to assess fatigue mechanisms. Twenty male competitive cyclists participated in a crossover, randomized, double-blind and placebo-controlled trial...
April 19, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28415065/acute-effect-of-biomechanical-muscle-stimulation-on-the-counter-movement-vertical-jump-power-and-velocity-in-division-i-football-players
#9
Bert H Jacobson, Taylor P Monaghan, John H Sellers, Eric C Conchola, Zach K Pope, Rob G Glass
Jacobson, BH, Monaghan, TP, Sellers, JH, Conchola, EC, Pope, ZK, and Glass, RG. Acute effect of biomechanical muscle stimulation on the counter-movement vertical jump power and velocity in division I football players. J Strength Cond Res 31(5): 1259-1264, 2017-Research regarding whole body vibration (WBV) largely supports such training augmentation in attempts to increase muscle strength and power. However, localized biomechanical vibration has not received the same attention. The purpose of this study was to assess peak and average power before and after acute vibration of selected lower-body sites in division I athletes...
May 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28410999/impact-of-time-and-work-rest-ratio-matched-sprint-interval-training-programmes-on-performance-a-randomised-controlled-trial
#10
Molly C Lloyd Jones, Martyn G Morris, John R Jakeman
OBJECTIVES: The aim of this study was to examine the effects of a short training intervention using two repeated sprint protocols matched for total sprint duration and work:rest ratio. DESIGN: Randomised-controlled trial. METHODS: Thirty physically active males were randomly allocated to one of two sprint training groups: a 6s group, a 30s group or a non-exercising control. The training groups were matched for work:rest ratio and total sprint time per session, and completed 6 training sessions over a 2-week period...
March 31, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28368959/the-effects-of-a-cycling-warm-up-including-high-intensity-heavy-resistance-conditioning-contractions-on-subsequent-4-km-time-trial-performance
#11
Alan Chorley, Kevin L Lamb
Prior exercise has been shown to improve subsequent performance via different mechanisms. Sport-specific conditioning contractions can be used to exploit the 'post-activation potentiation' (PAP) phenomenon to enhance performance although this has rarely been investigated in short endurance events. The aim of this study was to compare a cycling warm-up with PAP-inducing conditioning contractions (CW) with a moderate intensity warm-up (MW) on performance and physiological outcomes of 4 km time trial. Ten well-trained male endurance cyclists (V[Combining Dot Above]O2max 65...
March 25, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28364030/exercise-performance-and-physiological-responses-the-potential-role-of-redox-imbalance
#12
Kavey Vidal, Nathaniel Robinson, Stephen J Ives
Increases in oxidative stress or decreases in antioxidant capacity, or redox imbalance, are known to alter physiological function and has been suggested to influence performance. To date, no study has sought to manipulate this balance in the same participants and observe the impact on physiological function and performance. Using a single-blind, placebo-controlled, and counterbalanced design, this study examined the effects of increasing free radicals, via hyperoxic exposure (FiO2 = 1.0), and/or increasing antioxidant capacity, through consuming an antioxidant cocktail (AOC; vitamin-C, vitamin-E, α-lipoic acid), on 5-kilometer (km) cycling time-trial performance, and the physiological and fatigue responses in healthy college-aged males...
April 2017: Physiological Reports
https://www.readbyqxmd.com/read/28344454/the-effect-of-intermittent-head-cooling-on-aerobic-performance-in-the-heat
#13
Peter Walters, Nathaniel Thom, Kai Libby, Shelby Edgren, Amanda Azadian, Daniel Tannous, Elisabeth Sorenson, Brian Hunt
Thermoregulation is critical for athletes, particularly those for those who must perform in the heat. Most strategies aimed at reducing heat stress have cooled participants before or during activity. The objective of this study is to investigate whether seven minutes of head cooling applied between bouts of aerobic exercise in hot (35 ± 1.0 °C) and dry (14.68 ±4.29% rh) environmental conditions could positively effect participants peak power output (PP) on a maximal effort graded exercise test (GXT). Twenty-two recreational active men ages 18 to 23 (19...
March 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28332113/the-critical-power-concept-applications-to-sports-performance-with-a-focus-on-intermittent-high-intensity-exercise
#14
REVIEW
Andrew M Jones, Anni Vanhatalo
The curvilinear relationship between power output and the time for which it can be sustained is a fundamental and well-known feature of high-intensity exercise performance. This relationship 'levels off' at a 'critical power' (CP) that separates power outputs that can be sustained with stable values of, for example, muscle phosphocreatine, blood lactate, and pulmonary oxygen uptake ([Formula: see text]), from power outputs where these variables change continuously with time until their respective minimum and maximum values are reached and exercise intolerance occurs...
March 2017: Sports Medicine
https://www.readbyqxmd.com/read/28332025/endurance-aerobic-high-intensity-and-repeated-sprint-cycling-performance-is-unaffected-by-normobaric-live-high-train-low-a-double-blind-placebo-controlled-cross-over-study
#15
Jacob Bejder, Andreas Breenfeldt Andersen, Rie Buchardt, Tanja Hultengren Larsson, Niels Vidiendal Olsen, Nikolai Baastrup Nordsborg
The aim was to investigate whether 6 weeks of normobaric "Live High-Train Low" (LHTL) using altitude tents affect highly trained athletes incremental peak power, 26-km time-trial cycling performance, 3-min all-out performance, and 30-s repeated sprint ability. In a double-blinded, placebo-controlled cross-over design, seven highly trained triathletes were exposed to 6 weeks of normobaric hypoxia (LHTL) and normoxia (placebo) for 8 h/day. LHTL exposure consisted of 2 weeks at 2500 m, 2 weeks at 3000 m, and 2 weeks at 3500 m...
May 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28282741/effects-of-acute-exercise-dehydration-and-rehydration-on-cognitive-function-in-well-trained-athletes
#16
Christopher Irwin, Nadia Campagnolo, Elizaveta Iudakhina, Gregory R Cox, Ben Desbrow
This study investigated the effects of aerobic exercise, fluid loss and rehydration on cognitive performance in well-trained athletes. Ten endurance-trained males (25 ± 5 years; 175 ± 5 cm; 70.35 ± 5.46 kg; VO2max, 62.95 ± 7.20 ml · kg.min(-1)) lost ~2.5 ± 0.6% body mass via continuous cycling exercise at ~65% peak sustainable power output (60 min duration) before consuming different beverages (Water = W1 and W2, Sustagen Sport = SS, Powerade = PD) and food ad libitum on four separate occasions...
March 2, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28278174/exploring-the-performance-reserve-effect-of-different-magnitudes-of-power-output-deception-on-4-000-m-cycling-time-trial-performance
#17
Mark R Stone, Kevin Thomas, Michael Wilkinson, Emma Stevenson, Alan St Clair Gibson, Andrew M Jones, Kevin G Thompson
PURPOSE: The aim of the present study was to investigate whether a magnitude of deception of 5% in power output would lead to a greater reduction in the amount of time taken for participants to complete a 4000 m cycling TT than a magnitude of deception of 2% in power output, which we have previously shown can lead to a small change in 4000 m cycling TT performance. METHODS: Ten trained male cyclists completed four, 4000 m cycling TTs. The first served as a habituation and the second as a baseline for future trials...
2017: PloS One
https://www.readbyqxmd.com/read/28240713/the-cycling-power-profile-characteristics-of-national-level-junior-triathletes
#18
Christopher J Stevens, Kyle J M Bennett, Andrew R Novak, Aden B Kittel, Ben J Dascombe
With the draft-legal rule recently introduced to junior triathlon competition, it has become difficult to assess cycling performance through race results. Therefore, this study assessed the cycling power profile characteristics of national level junior triathletes to assist with physical assessment and program design. Thirteen male (17.0 ± 1.0 yr) and eleven female (17.2 ± 1.3 yr) national level junior triathletes completed a cycling power profile that consisted of maximal intervals that lasted 6, 15, 30, 60, 240 and 600 seconds in duration...
February 23, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28239404/impact-of-a-6-week-non-energy-restricted-ketogenic-diet-on-physical-fitness-body-composition-and-biochemical-parameters-in-healthy-adults
#19
Paul Urbain, Lena Strom, Lena Morawski, Anja Wehrle, Peter Deibert, Hartmut Bertz
BACKGROUND: The ketogenic diet (KD) is a very low-carbohydrate, high-fat and adequate-protein diet that without limiting calories induces different metabolic adaptations, eg, increased levels of circulating ketone bodies and a shift to lipid metabolism. Our objective was to assess the impact of a 6-week non-energy-restricted KD in healthy adults beyond cohorts of athletes on physical performance, body composition, and blood parameters. METHODS: Our single arm, before-and-after comparison study consisted of a 6-week KD with a previous preparation period including detailed instructions during classes and individual counselling by a dietitian...
2017: Nutrition & Metabolism
https://www.readbyqxmd.com/read/28182508/effects-of-carbohydrate-ingestion-and-carbohydrate-mouth-rinse-on-repeat-sprint-performance
#20
Ben M Krings, Timothy J Peterson, Brandon D Shepherd, Matthew J McAllister, JohnEric W Smith
The purpose of this investigation was to examine to the influence of carbohydrate ingestion (CHOI) and carbohydrate mouth rinse (CHOR) on acute repeat maximal sprint performance. Fourteen healthy males (age: 21.7 ± 1.8 years, mass: 82.3 ± 12.3 kg) completed a total of five 15-s maximal repeat sprints on a cycle ergometer against 0.075 kg ・ kg(-1) body mass each separated by 4 min of active recovery. Subjects completed four experimental trials and were randomly assigned one of four treatments: (1) CHOI, (2) CHOR, (3) placebo mouth rinse (PLAR), (4) placebo ingestion (PLAI)...
June 2017: International Journal of Sport Nutrition and Exercise Metabolism
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