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https://www.readbyqxmd.com/read/29035635/effects-of-varying-the-step-duration-on-the-determination-of-lactate-thresholds-in-elite-rowers
#1
Pitre C Bourdon, Sarah M Woolford, Jonathan D Buckley
This study aimed to identify the minimum increment duration required to accurately assess two distinct lactate thresholds. Twenty-one elite rowers (12 female, 9 males) each performed 8-9 rowing tests comprising: 1) five progressive incremental tests (3, 4, 5, 7 or 10 min steps); and 2) at least three 30-min constant-intensity maximal lactate steady state (MLSS) assessments. Power output (PO) at lactate threshold 1 (LT1) was higher in the 3- and 4-min incremental tests. No other measures were different for LT1...
October 16, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29035587/computer-aided-stroke-by-stroke-visualization-of-actual-and-target-power-allows-for-continuously-increasing-ramp-tests-on-wind-braked-rowing-ergometers
#2
Gunnar Treff, Kay Winkert, Katja Machus, Jürgen M Steinacker
PURPOSE: Ramp tests are continuously increasing exercise tests used for determination of maximal oxygen uptake (⩒O2max), which is identifiable by a plateau in ⩒O2despite increasing mechanical power output (LOAD). On wind-braked rowing ergometers (RowErg) it is hardly feasible to ensure a continuous increase in LOAD until test termination, because neither resistance nor stroke-frequency are externally adjustable, but depend on the rower. To enable ramp tests on rowing ergometers, we produced visual stroke-by-stroke feedback showing target and actual LOAD to the rower...
October 16, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28991036/no-effect-of-%C3%AE-alanine-on-muscle-function-and-kayak-performance
#3
Signe Refsgaard Bech, Tobias Schmidt Nielsen, Martin Hald, Jarl Pors Jakobsen, Nikolai Baastrup Nordsborg
PURPOSE: It was investigated if β-alanine supplementation counteracts muscular fatigue development or improves athletic performance. METHODS: Elite kayak rowers (10 males and 7 females) were supplemented with either 80 mg/kg body mass/day β-alanine or placebo for 8 weeks. Muscular fatigue development was investigated by applying a 2 min elbow flexor maximal voluntary contraction (MVC). Electromyography (EMG) was recorded continuously and voluntary activation (VA) was determined 30, 60, 90 and 115 s into the 2 min MVC...
October 5, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28983443/rowers-self-reported-behaviors-attitudes-and-safety-concerns-related-to-exercise-training-and-competition-during-pregnancy
#4
Ashley Franklin, Joanna Mishtal, Teresa Johnson, Judith Simms-Cendan
Background The American College of Obstetrics and Gynecology notes that pregnant athletes require more supervision due to their involvement in strenuous training schedules throughout pregnancy. Currently, rowing is not mentioned in the guidelines despite its increasing popularity, high cardiovascular demands, and risk for abdominal trauma. Methods This study aimed to elicit information from competitive female rowers regarding exercise, training, and competition during pregnancy. We administered a survey consisting of 122 items to female Masters rowers in the United States, aged 21 to 49 years, from June to December 2013...
August 1, 2017: Curēus
https://www.readbyqxmd.com/read/28979208/sedentary-behavior-among-national-elite-rowers-during-off-training-a-pilot-study
#5
Billy Sperlich, Martin Becker, Andreas Hotho, Birgit Wallmann-Sperlich, Mahdi Sareban, Kay Winkert, Jürgen M Steinacker, Gunnar Treff
The aim of this pilot study was to analyze the off-training physical activity (PA) profile in national elite German U23 rowers during 31 days of their preparation period. The hours spent in each PA category (i.e., sedentary: <1.5 metabolic equivalents (MET); light physical activity: 1.5-3 MET; moderate physical activity: 3-6 MET and vigorous intense physical activity: >6 MET) were calculated for every valid day (i.e., >480 min of wear time). The off-training PA during 21 weekdays and 10 weekend days of the final 11-week preparation period was assessed by the wrist-worn multisensory device Microsoft Band II (MSBII)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28965345/relationship-between-force-velocity-profiles-and-1-500-m-ergometer-performance-in-young-rowers
#6
Caroline Giroux, Hugo Maciejewski, Amal Ben-Abdessamie, Frédéric Chorin, Julien Lardy, Sebastien Ratel, Abderrahmane Rahmani
Rowing races require developing high level of force and power output at high contraction velocity. This study determined the force-velocity and power-velocity (F-P-V) profiles of lower and upper limbs of adolescent rowers and their relationships with a 1,500-m rowing ergometer performance. The power developed during the 1,500-m (P1500) was evaluated in fourteen national-level male rowers (age: 15.3±0.6 yrs). F-P-V profiles were assessed during bench pull (BP) and squat jump (SJ) exercises. The theoretical maximal values of force (F0), velocity (V0), power output (Pmax) and the F-V relationship slope (S FV ) were determined...
October 1, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28965342/factors-of-rowing-ergometer-performance-in-high-level-female-rowers
#7
Muriel Bourdin, Jean-Rene Lacour, Charles Imbert, Laurent André Messonnier
The present study investigated morphological and physiological factors of rowing ergometer performance over 2000 m (P2000, W) in 70 national and international level [27 lightweight (LW) and 43 heavyweight (HW)] female rowers. Maximal oxygen uptake (V̇O2max, L.min(-1)), maximal aerobic power (Pamax, W), power output corresponding to 4 mmol.L(-1) blood lactate concentration expressed in absolute (PLa4, W) and relative to Pamax (PLa4%, %) values, peak power output (Ppeak, W), and rowing gross efficiency (RGE, %) were determined during an incremental rowing test...
October 1, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28958487/how-gender-and-boat-side-affect-shape-characteristics-of-force-angle-profiles-in-single-sculling-insights-from-functional-data-analysis
#8
John Warmenhoven, Stephen Cobley, Conny Draper, Andrew Harrison, Norma Bargary, Richard Smith
OBJECTIVES: To examine whether gender or side of the boat influenced shape characteristics of the force-angle profile in on-water single sculling. DESIGN: Cross-sectional study design. METHODS: Bivariate functional principal components analysis (bfPCA) was applied to force-angle data to identify the main modes of variance in curves of forty highly skilled male and female rowers (national and international level), rowing at 32 strokes per minute in a single scull boat...
August 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28952837/training-intensity-distribution-over-a-four-year-cycle-in-olympic-champion-rowers-different-roads-lead-to-rio
#9
Daniel J Plews, Paul B Laursen
The purpose of this study was to compare the training intensity distribution (TID) of the undefeated world champion male rowing New Zealand (kiwi) pair over a four-year Olympic cycle, across training phases, training years, and between individuals. Training data, including heart rate and boat speed, were recorded in the athletes rowing in the same boat between March 2013 and August 2016, ending with the Rio Olympics final. Progressive exercise tests assessed first (LT1) and second (LT2) lactate thresholds and associated heart rates, to determine the percentage of training performed below, between and above these demarcation points...
September 27, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28939198/joint-action-in-an-elite-rowing-pair-crew-after-intensive-team-training-the-reinforcement-of-extra-personal-processes
#10
Mehdi R'Kiouak, Jacques Saury, Marc Durand, Jérôme Bourbousson
The present study is a follow-up case report of the study from R'Kiouak and colleagues (2016). From the initial study that analyzed how individual experts rowed together while they never had practiced together, we seized here the opportunity to investigate how both rowers synchronize after having intensively practiced joint action through a national training program in which they were invited to take part. The joint action of 2 individual expert rowers, which composed a coxless pair crew, was tracked on-the-water at the end of a team-training program...
September 19, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28872385/new-records-in-human-power
#11
Thomas Haugen, Gøran Paulsen, Stephen Seiler, Øyvind Sandbakk
Maximal aerobic and anaerobic power are crucial performance determinants in most sports disciplines. Numerous studies have published power data from elite athletes over the years, particularly in runners, cyclists, rowers and cross-country skiers. In this invited review, we define the current "world records" in human upper limits of aerobic and anaerobic power. Currently, V̇O2max values of ~7.5 and 7.0 L·min(-1) in male cross-country (XC) skiers and rowers, respectively, and/or ~90 ml·kg(-1)·min(-1) in XC skiers, cyclists and runners can be described as upper human limits for aerobic power...
September 5, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28820847/effectiveness-of-a-16-week-high-intensity-cardioresistance-training-program-in-adults
#12
Tina A Greenlee, Daniel R Greene, Nathan J Ward, Ginger E Reeser, Courtney M Allen, Nicholas W Baumgartner, Neal J Cohen, Arthur F Kramer, Charles H Hillman, Aron K Barbey
Greenlee, TA, Greene, DR, Ward, NJ, Reeser, GE, Allen, CM, Baumgartner, NW, Cohen, NJ, Kramer, AF, Hillman, CH, and Barbey, AK. Effectiveness of a 16-week high-intensity cardioresistance training program in adults. J Strength Cond Res 31(9): 2528-2541, 2017-The purpose of this study was to determine the efficacy of a novel, 16-week high-intensity cardioresistance training (HICRT) program on measures of aerobic fitness, agility, aerobic power, muscular endurance, lower-body explosive power, and self-reported activity level...
September 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28806771/effect-of-knee-alignment-on-the-quadriceps-femoris-muscularity-cross-sectional-comparison-of-trained-versus-untrained-individuals-in-both-sexes
#13
COMPARATIVE STUDY
Ryoichi Ema, Taku Wakahara, Kuniaki Hirayama, Yasuo Kawakami
Knee alignment is suggested to be a factor affecting each quadriceps femoris muscle size, and knee alignment such as Q-angle differs between men and women. Also, training can induce inhomogeneous hypertrophy among the quadriceps femoris, thereby leading to different component characteristics of the muscles. If Q-angle is a major determinant of the quadriceps femoris muscularity, it is hypothesized that the sex-related difference in the quadriceps femoris muscularity, if any, is further highlighted in trained individuals, being associated with Q-angle...
2017: PloS One
https://www.readbyqxmd.com/read/28771779/population-pharmacokinetic-model-of-transdermal-nicotine-delivered-from-a-matrix-type-patch
#14
Matthew W Linakis, Joseph E Rower, Jessica K Roberts, Eleanor I Miller, Diana G Wilkins, Catherine M T Sherwin
AIMS: Nicotine addiction is an issue faced by millions of individuals worldwide. As a result, nicotine replacement therapies, such as transdermal nicotine patches, have become widely distributed and used. While the pharmacokinetics of transdermal nicotine have been extensively described using noncompartmental methods, there are few data available describing the between-subject variability in transdermal nicotine pharmacokinetics. The aim of this investigation was to use population pharmacokinetic techniques to describe this variability, particularly as it pertains to the absorption of nicotine from the transdermal patch...
August 3, 2017: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28729847/effects-of-intensive-crew-training-on-individual-and-collective-characteristics-of-oar-movement-in-rowing-as-a-coxless-pair
#15
Mathieu Feigean, Mehdi R'Kiouak, Reinoud J Bootsma, Jérôme Bourbousson
This case study examined how two rowers adapted their rowing patterns following crew training as a newly formed coxless pair. The two participants were expert (double-oar) single scull-boat rowers. Performing as a crew in the coxless-pair's sweep-boat, where each rower operates a single oar, on-the-water data were collected before and after a 6-week intensive team-training program. Rowing patterns were characterized by the horizontal oar angle, oar angular velocity and linear oar-water velocity profiles during the catch (minimal oar angle) to finish (maximal oar angle) half-cycles of the propulsive water phase...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28714791/influence-of-body-composition-on-functional-movement-screen%C3%A2-scores-in-collegiate-football-players
#16
Constantine P Nicolozakes, Daniel K Schneider, Ben Rower, James Borchers, Timothy E Hewett
CONTEXT: The Functional Movement Screen (FMS™) is used to identify movement asymmetries and deficiencies. While obesity has been reported to impede movement, the correlation between body mass index (BMI), body fat percentage (BF%), and FMS™ in athletes is unknown. OBJECTIVE: To determine if there is a relationship between BMI, BF%, and FMS™ scores in a sample of National Collegiate Athletic Association (NCAA) Division I football athletes. DESIGN: Cross-sectional study...
July 17, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28682806/cognitive-resilience-and-psychological-responses-across-a-collegiate-rowing-season
#17
Morgan R Shields, M Alison Brooks, Kelli F Koltyn, Jee-Seon Kim, Dane B Cook
INTRODUCTION: Student-athletes face numerous challenges across their competitive season. Although mood states have been previously studied, little is known about adaptations in other psychological responses, specifically cognition. The purpose of this study was to characterize cognitive function, mood, sleep, and stress responses at select time points of a season in collegiate rowers. It was hypothesized that during baseline, typical training, and recovery, athletes would show positive mental health profiles, in contrast to decreases in cognition with increases in negative mood and measurements of stress during peak training...
November 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28673743/-ice-axe-wrist-a-case-report-of-intersection-syndrome-in-2-climbers
#18
Anna L Tobin
Intersection syndrome is an inflammatory condition located at the crossing point between the first and second dorsal compartments in the wrist. It is an uncommon presentation but has been recognized as an injury typical of rowers (when it is named oarsman's wrist) and other sports such as racquet sports, baseball, cycling, hockey, golf, ice hockey, skiing, and softball. It has not been previously described in climbers. This report details 2 cases of intersection associated with the use of an ice axe. The first presentation was in a female climber who was using an ice axe for climbing in the Nepal Himalayas and the second was in a male climber using an ice axe for winter climbing training in the Alps...
June 30, 2017: Wilderness & Environmental Medicine
https://www.readbyqxmd.com/read/28662110/back-pain-in-elite-sports-a-cross-sectional-study-on-1114-athletes
#19
Daniela Fett, Katharina Trompeter, Petra Platen
OBJECTIVES: To establish the prevalence of back pain in German elite athletes; examine the influence of age, sex, sports discipline and training volume; and compare elite athletes with a physically active control group. METHODS: A standardized and validated online back pain questionnaire was sent by the German Olympic Sports Confederation to approximately 4,000 German national and international elite athletes, and a control group of 253 physically active but non-elite sports students...
2017: PloS One
https://www.readbyqxmd.com/read/28649720/in-season-changes-in-heart-rate-recovery-are-inversely-related-to-time-to-exhaustion-but-not-aerobic-capacity-in-rowers
#20
Kristin Haraldsdottir, Stacey Brickson, Jennifer Sanfilippo, Warren Dunn, Andrew Watson
PURPOSE: Determine if in-season changes in heart rate recovery (HRR) are related to aerobic fitness and performance in collegiate rowers. METHODS: 22 female collegiate rowers completed testing before and after their competitive season. Body fat percentage (BF%) was determined by dual-energy x-ray absorptiometry. Maximal aerobic capacity (VO2max ) and time to exhaustion (Tmax ) were determined during maximal rowing ergometer testing followed by 1 minute of recovery...
June 26, 2017: Scandinavian Journal of Medicine & Science in Sports
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