scholarly journals Effects of Three-Day Serial Sodium Bicarbonate Loading on Performance and Physiological Parameters During a Simulated Basketball Test in Female University Players

2018 ◽  
Vol 28 (5) ◽  
pp. 547-552 ◽  
Author(s):  
Anne Delextrat ◽  
Sinead Mackessy ◽  
Luis Arceo-Rendon ◽  
Aaron Scanlan ◽  
Roger Ramsbottom ◽  
...  
Keyword(s):  
Side Effects ◽  
Sodium Bicarbonate ◽  
Blood Lactate ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Basketball Players ◽  
Placebo Condition ◽  
Jump Performance ◽  
Repeated Sprint ◽  
Gastrointestinal Side Effects

The aim of this study was to investigate the effect of 3-day serial sodium bicarbonate ingestion on repeated sprint and jump performance. Fifteen female university basketball players (23.3 ± 3.4 years; 173.1 ± 5.8 cm; 65.8 ± 6.3 kg; 23.6 ± 4.9% body fat) ingested 0.4 g/kg body mass of sodium bicarbonate or placebo for 3 days (split in three equal daily doses), before completing a simulated basketball exercise. Sprint and circuit times, jump heights, performance decrements, and gastrointestinal side effects were recorded during the test, and blood lactate concentration was measured pre- and posttest. Sodium bicarbonate supplementation led to significant decreases in mean sprint times (1.34 ± 0.23 vs. 1.70 ± 0.41 s, p = .008, 95% confidence intervals [−0.54, −0.10 s]) and mean circuit times (30.6 ± 2.0 vs. 31.3 ± 2.0 s, p = .044) and significantly greater mean jump height (26.8 [range 25.2–34.2] vs. 26.0 [range 25.6–33.6] cm, p = .013) compared with placebo. Performance decrement was significantly less for sprints with sodium bicarbonate compared with placebo (9.9 [range 3.4–37.0]% vs. 24.7 [range 4.1–61.3]%, p = .013), but not different for jumps (13.1 ± 4.5% vs. 12.5 ± 3.1%, p = .321) between conditions. No differences in gastrointestinal side effects were noted between conditions. Significantly greater postexercise blood lactate concentrations were measured in the sodium bicarbonate condition compared with the placebo condition (8.2 ± 2.8 vs. 6.6 ± 2.4 mmol/L, p = .010). This study is the first to show that serial loading of sodium bicarbonate is effective for basketball players to improve repeated sprint and jump performance during competition, or withstand greater training load during practice sessions without any gastrointestinal side effects.

scholarly journals Effects of Ball Drills and Repeated-Sprint-Ability Training in Basketball Players

2019 ◽  
Vol 14 (6) ◽  
pp. 757-764 ◽  
Author(s):  
Martina A. Maggioni ◽  
Matteo Bonato ◽  
Alexander Stahn ◽  
Antonio La Torre ◽  
Luca Agnello ◽  
...  
Keyword(s):  
Blood Lactate ◽  
Physical Performance ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Technical Skills ◽  
Control Group ◽  
Basketball Players ◽  
Repeated Sprint Ability ◽  
Repeated Sprint ◽  
Sprint Ability

Purpose: To investigate the effects of ball drills and repeated-sprint-ability training during the regular season in basketball players. Methods: A total of 30 players were randomized into 3 groups: ball-drills training (BDT, n = 12, 4 × 4 min, 3 vs 3 with 3-min passive recovery), repeated-sprint-ability training (RSAT, n = 9, 3 × 6 × 20-m shuttle running with 20-s and 4-min recovery), and general basketball training (n = 9, basketball technical/tactical exercises), as control group. Players were tested before and after 8 wk of training using the following tests: , squat jump, countermovement jump, Yo-Yo Intermittent Recovery Test Level 1 (YIRT1), agility T test, line-drill test, 5-/10-/20-m sprints, and blood lactate concentration. A custom-developed survey was used to analyze players’ technical skills. Results: After training, significant improvements were seen in YIRT1 (BDT P = .014, effect size [ES] ± 90% CI = 0.8 ± 0.3; RSAT P = .022, ES ± 90% CI = 0.7 ± 0.3), the agility T test (BDT P = .018, ES ± 90% CI = 0.7 ± 0.5; RSAT P = .037, ES ± 90% CI = 0.7 ± 0.5), and the line-drill test (BDT P = .010, ES ± 90% CI = 0.3 ± 0.1; RSAT P < .0001, ES ± 90% CI = 0.4 ± 0.1). In the RSAT group, only 10-m sprint speeds (P = .039, ES ± 90% CI = 0.3 ± 0.2) and blood lactate concentration (P = .004, ES ± 90% CI = 0.8 ± 1.1) were improved. Finally, technical skills were increased in BDT regarding dribbling (P = .038, ES ± 90% CI = 0.8 ± 0.6), shooting (P = .036, ES ± 90% CI = 0.8 ± 0.8), passing (P = .034, ES ± 90% CI = 0.9 ± 0.3), rebounding (P = .023, ES ± 90% CI = 1.1 ± 0.3), defense (P = .042, ES ± 90% CI = 0.5 ± 0.5), and offense (P = .044, ES ± 90% CI = 0.4 ± 0.4) skills. Conclusions: BDT and RSAT are both effective in improving the physical performance of basketball players. BDT had also a positive impact on technical skills. Basketball strength and conditioning professionals should include BDT as a routine tool to improve technical skills and physical performance simultaneously throughout the regular training season.

EFFECT OF THE NUMBER OF SPRINT REPETITIONS ON THE VARIATION OF BLOOD LACTATE CONCENTRATION IN REPEATED SPRINT SESSIONS

2014 ◽  
Vol 31 (2) ◽  
pp. 151-156 ◽  
Author(s):  
Zied Gharbi ◽  
Wajdi Dardouri ◽  
Radhouane Haj-Sassi ◽  
Carlo Castagna ◽  
Karim Chamari ◽  
...  
Keyword(s):  
Blood Lactate ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Repeated Sprint

scholarly journals Análisis de la intensidad de juego durante los partidos de play-off en jugadores de baloncesto en silla de ruedas (Game intensity analysis of wheelchair basketball players during play-off matches)

Retos ◽  
2016 ◽  
pp. 54-58 ◽  
Author(s):  
Aitor Iturricastillo Urteaga ◽  
Javier Yanci Irigoyen ◽  
Itziar Barrenetxea Iriondo ◽  
Cristina Granados Dominguez
Keyword(s):  
Heart Rate ◽  
Body Temperature ◽  
Blood Lactate ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Tympanic Temperature ◽  
Intensity Analysis ◽  
Wheelchair Basketball ◽  
Basketball Players ◽  
Los Grupos

El principal objetivo del estudio fue analizar la intensidad de juego en jugadores de baloncesto en silla de ruedas (BSR) durante los partidos de play-off. En este estudio participaron nueve jugadores masculinos de BSR de primera división (34,8 ± 7,8 años). En total se analizaron seis partidos y los participantes fueron divididos en tres grupos según los minutos jugados: jugadores que jugaron 30-40 minutos (BSR30-40), jugadores que jugaron 20-29 minutos (BSR20-30) y los que jugaron entre 1 segundo y 19 minutos (BSR1-19). Durante todos los partidos se monitorizó la frecuencia cardíaca (FC), y además, se obtuvo la temperatura timpánica y la concentración de lactato sanguíneo antes e inmediatamente después de cada partido. Se encontraron diferencias significativas (P<0,05) en todas las zonas de intensidad entre el grupo BSR30-40 y BSR1-19. Los jugadores BSR30-40 pasaron un 36,4% del tiempo total por encima del 85% de la FCmáx, mientras que los jugadores BSR20-30 y BSR1-19 solo pasaron un 16,1 y un 9,2% del tiempo total. En todos los grupos tanto la temperatura timpánica (1,5-2,0%, P<0,05) como la concentración de lactato (81,1-125,0%, P<0,05) aumentó significativamente. Los resultados obtenidos en nuestro estudio exponen que los jugadores del grupo BSR30-40 pasaron mayor porcentaje de tiempo a alta intensidad (>85% de la FCmáx), con un aumento significativo de la temperatura y la concentración de lactato sanguíneo. Los entrenadores y preparadores físicos deberían tener en cuenta estas diferencias fisiológicas en función de los minutos jugados a la hora de planificar la temporada y los descansos post partido.Abstract. The main objective of the study was to analyze the game intensity in wheelchair basketball players (WB) during play-off matches. This study involved nine WB players of Spanish first division league (34.8 ± 7.8 years). Six play-off matches were analyzed and participants were divided into three groups according to the minutes they had played: players who had played between 30-40 minutes (WB30-40), players who had played between 20-30 minutes (WB20-30) and players who had played between 1 second and 20 minutes (WB1-19). For every game the heart rate (HR) was monitored by telemetry, and in addition, the tympanic temperature and blood lactate concentration samples were obtained before and immediately after each match. Significant differences (P<0.05) were observed in all intensity zones between WB30-40 and WB1-19 groups. The WB30-40 players spent 36.4% of the total time over 85% of maximum HR, while WB20-30 and WB1-19 players only spent 16.1 and 9.2% of the total time. Moreover, in all groups both tympanic temperature (from 1.5 to 2.0%, P<0.05) and lactate concentration (81.1 to 125.0%, P <0.05) increased significantly. The game intensity monitored by HR is different for WB players according to the minutes they had played (WB30-40, WB20-30 and WB1-19). The results of our study showed that the WB30-40 group obtained higher percentage of time spent at high intensity (> 85% of maximum HR) than other groups, with a significant increase in body temperature and blood lactate concentration. Coaches and physical trainers should be aware of these physiological differences when planning the season and post-match sessions.

scholarly journals Anaerobic Performance after a Low-Carbohydrate Diet (LCD) Followed by 7 Days of Carbohydrate Loading in Male Basketball Players

Nutrients ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 778 ◽  
Author(s):  
Małgorzata Michalczyk ◽  
Jakub Chycki ◽  
Adam Zajac ◽  
Adam Maszczyk ◽  
Grzegorz Zydek ◽  
...  
Keyword(s):  
Blood Lactate ◽  
Peak Power ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Total Work ◽  
Carbohydrate Diet ◽  
Basketball Players ◽  
Low Carbohydrate Diet ◽  
Carbohydrate Loading ◽  
Low Carbohydrate

Despite increasing interest among athletes and scientists on the influence of different dietary interventions on sport performance, the association between a low-carbohydrate, high-fat diet and anaerobic capacity has not been studied extensively. The aim of this study was to evaluate the effects of a low-carbohydrate diet (LCD) followed by seven days of carbohydrate loading (Carbo-L) on anaerobic performance in male basketball players. Fifteen competitive basketball players took part in the experiment. They performed the Wingate test on three occasions: after the conventional diet (CD), following 4 weeks of the LCD, and after the weekly Carbo-L, to evaluate changes in peak power (PP), total work (TW), time to peak power (TTP), blood lactate concentration (LA), blood pH, and bicarbonate (HCO3−). Additionally, the concentrations of testosterone, growth hormone, cortisol, and insulin were measured after each dietary intervention. The low-carbohydrate diet procedure significantly decreased total work, resting values of pH, and blood lactate concentration. After the low-carbohydrate diet, testosterone and growth hormone concentrations increased, while the level of insulin decreased. After the Carbo-L, total work, resting values of pH, bicarbonate, and lactate increased significantly compared with the results obtained after the low-carbohydrate diet. Significant differences after the low-carbohydrate diet and Carbo-L procedures, in values of blood lactate concentration, pH, and bicarbonate, between baseline and post exercise values were also observed. Four weeks of the low-carbohydrate diet decreased total work capacity, which returned to baseline values after the carbohydrate loading procedure. Moreover, neither the low-carbohydrate feeding nor carbohydrate loading affected peak power.

scholarly journals Endurance skills of young team game players

2015 ◽  
Vol 7 (3) ◽  
pp. 13-22
Author(s):  
PAWEL CHMIURA ◽  
KAMIL SWIERZKO ◽  
JUSTYNA ANDRZEJEWSKA ◽  
MAREK POPOWCZAK ◽  
ANDRZEJ DUDKOWSKI ◽  
...  
Keyword(s):  
Heart Rate ◽  
Blood Lactate ◽  
Exercise Test ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Young Male ◽  
Basketball Players ◽  
Cross Sectional ◽  
Volleyball Players ◽  
Team Game

Background: The aim of the present study was to assess physiological-biochemical reactions to incremental exercise loads and the levels and development of endurance skills in young male and female team game players. Material/Methods: The study sample comprised 370 soccer, handball, basketball and volleyball players (186 girls and 184 boys) from the Lower Silesian Regional Teams in Poland, aged 14.20 ±1.37 years (boys) and 13.90 ±1.15 years (girls). The exercise test consisted ofthe shuttle run Beep Test for estimation of aerobic fitness. The assessment of endurance skills was based on the length of the covered distance in the Beep Test as well as on measurements of the heart rate (physiological) and blood lactate concentration (metabolic). Results: Among the four studied groups of players a statistically significant improvement in endurance skills was noted in male volleyball players (p ≤ 0.05). Conclusions: Significantly higher levels of endurance skills in young male handball, basketball and volleyball players and in female volleyball players who remained on the regional teams for two consecutive years may be an indication of the players’ proper selection and training. Significant changes in blood lactate concentration in young players, revealed in both cross-sectional and continuous studies, were only noted in male volleyball players. Significant decreases in the heart rate in the cross-sectional study was found only in male handball and basketball players and in female basketball players, whereas in the continuous study only in male handball players. An assessment of young players’ physiological-biochemical reactions on the basis of exercise test results can effectively enhance the optimization of training loads.

scholarly journals Variation in Lower Limb Power and Three Point Shot Performance Following Repeated Sprints: One vs. Five Changes of Direction in Male Basketball Players

2021 ◽  
Vol 77 (1) ◽  
pp. 169-179
Author(s):  
Seifeddine Brini ◽  
Anne Delextrat ◽  
Anissa Bouassida
Keyword(s):  
Repeated Measures ◽  
Perceived Exertion ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Basketball Players ◽  
Jump Performance ◽  
Training Adaptations ◽  
Paired Samples ◽  
Basketball Game ◽  
Jump Test

Abstract Repeated sprint ability (RSA) with five changes of direction was well admitted to replicate real basketball game situations, but the additional changes of direction may affect some fundamental skills and performances in basketball. The aim of this study was to investigate the effects of RSA with one vs. five changes of direction (IRSA5COD) on squat jump (SJ), five jump test (FJT) and three point shot (3PS) performances in male basketball players. Sixteen participants (23.4 ± 2.3 years; 1.86 ± 0.10 m; 77.8 ± 7.7 kg) randomly performed eight testing sessions consisting of either RSA (10 repetitions of (15 m + 15 m)) or IRSA5COD (10 repetitions of (5 m + 5 m + 5 m + 5 m + 5 m + 5 m)) performed alone or immediately followed by the SJ, FJT or 3PS. The heart rate (HR) and ratings of perceived exertion (RPE) were continuously recorded, while blood lactate concentration was measured post-tests. Differences between RSA and IRSA5COD were evaluated by a Student t-test for paired samples, while analyses of variance (ANOVAs) with repeated measures assessed differences in SJ, FJT and 3PS performance between baseline, post-RSA and post-IRSA5COD. A significantly poorer FJT performance post-RSA was shown compared to baseline (7.47 ± 0.47 vs.7.54 ± 0.47 m, p = 0.01) and post-IRSA 5COD (7.47 ± 0.47 vs. 7.56 ± 0.49%, p = 0.048). Significantly lower 3PS accuracy was also observed post-IRSA 5COD compared to baseline (41.3 ± 3.1 vs.53.1 ± 2.8%, p = 0.003) and post-RSA (41.3 ± 3.1 vs. 48.1 ± 3.7%, p = 0.033). These results suggest that jump performance required for crucial actions such as lay-ups is negatively affected by longer sprints (15-m) with few changes of direction, while 3PS accuracy is impaired by shorter sprints with many changes of direction. These situations should be replicated when training these particular abilities to optimize training adaptations.

The Physiology and Biomechanics of Upper-Body Repeated Sprints in Ice Sledge Hockey

2014 ◽  
Vol 9 (1) ◽  
pp. 77-84 ◽  
Author(s):  
Øyvind Sandbakk ◽  
Matt Spencer ◽  
Gertjan Ettema ◽  
Silvana Bucher Sandbakk ◽  
Knut Skovereng ◽  
...  
Keyword(s):  
Heart Rate ◽  
Blood Lactate ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Upper Body ◽  
Active Recovery ◽  
National Team ◽  
Repeated Sprint ◽  
Hockey Players ◽  
Biomechanical Responses

Purpose:To investigate performance and the associated physiological and biomechanical responses during upper-body repeated-sprint work.Methods:Twelve male ice sledge hockey players from the Norwegian national team performed eight 30-m sprints with start every 30 s and an active recovery between sprints. Time was captured every 10 m by photocells, cycle length and rate were determined by video analyses, and heart rate and blood lactate concentration were measured by conventional methods.Results:The percentage sprint decrement was 7% over the 8 trials, with significant reductions in performance from the previous trial already on the second trial (all P < .05). Furthermore, cycle rate was reduced by 9% over the 8 trials (P < .05). Similar changes in performance and kinematic patterns were evident for all 10-m phases of the sprints. Heart rate gradually increased to 94% of maximal (178 ± 10 beats/min) over the 8 trials, and the mean reduction in heart rate was 7 ± 2 beats/min during the 22–24 s of active recovery for all trials (all P < .05). The blood lactate concentration increased to the athletes’ maximal levels over the 8 sprints (P < .05).Conclusions:This is the first study to investigate performance, physiological, and biomechanical aspects of self-propelled upperbody repeated-sprint work. The observed sprint decrement over the 8 trials was associated with reductions in cycle rates and high physiological demands. However, no kinematic and physiological characteristics were significantly correlated to repeated-sprint ability or the sprint decrement.

Blood Lactate Concentration during Exercise in Horses Fed a High-Fat Diet and Administered Sodium Bicarbonate

1994 ◽  
Vol 124 (suppl_12) ◽  
pp. 2738S-2739S ◽  
Author(s):  
Pamela L. Ferrante ◽  
Lynn E. Taylor ◽  
David S. Kronfeld ◽  
Thomas N. Meacham
Keyword(s):  
Sodium Bicarbonate ◽  
Blood Lactate ◽  
High Fat Diet ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
High Fat

scholarly journals Relationship Between Repeated Sprint Performance and both Aerobic and Anaerobic Fitness

2014 ◽  
Vol 40 (1) ◽  
pp. 139-148 ◽  
Author(s):  
Wajdi Dardouri ◽  
Mohamed Amin Selmi ◽  
Radhouane Haj Sassi ◽  
Zied Gharbi ◽  
Ahmed Rebhi ◽  
...  
Keyword(s):  
Blood Lactate ◽  
Body Mass ◽  
Anaerobic Power ◽  
Lactate Concentration ◽  
Sprint Performance ◽  
Peak Time ◽  
Jump Performance ◽  
Repeated Sprint ◽  
Aerobic And Anaerobic ◽  
Shuttle Run

Abstract The aims of this study were firstly, to examine the relationship between repeated sprint performance indices and anaerobic speed reserve (AnSR), aerobic fitness and anaerobic power and secondly, to identify the best predictors of sprinting ability among these parameters. Twenty nine subjects (age: 22.5 ± 1.6 years, body height: 1.8 ± 0.1 m, body mass: 68.8 ± 8.5 kg, body mass index (BMI): 22.2 ± 2.1 kg•m-2, fat mass: 11.3 ± 2.9 %) participated in this study. All participants performed a 30 m sprint test (T30) from which we calculated the maximal anaerobic speed (MAnS), vertical and horizontal jumps, 20m multi-stage shuttle run test (MSRT) and repeated sprint test (10 x 15 m shuttle run). AnSR was calculated as the difference between MAnS and the maximal speed reached in the MSRT. Blood lactate sampling was performed 3 min after the RSA protocol. There was no significant correlation between repeated sprint indices (total time (TT); peak time (PT), fatigue index (FI)) and both estimated VO2max and vertical jump performance). TT and PT were significantly correlated with T30 (r=0.63, p=0.001 and r=0.62, p=0.001; respectively), horizontal jump performance (r = -0.47, p = 0.001 and r = -0.49, p = 0.006; respectively) and AnSR (r=-0.68, p= 0.001 and r=-0.70, p=0.001, respectively). Significant correlations were found between blood lactate concentration and TT, PT, and AnSR (r=-0.44, p=0.017; r=-0.43, p=0.018 and r=0.44, p=0.016; respectively). Stepwise multiple regression analyses demonstrated that AnSR was the only significant predictor of the TT and PT, explaining 47% and 50% of the shared variance, respectively. Our findings are of particular interest for coaches and fitness trainers in order to predict repeated sprint performance by using AnSR that can easily identify the respective upper performance limits supported by aerobic and anaerobic power of a player involved in multi-sprint team sports.

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