The Experts below are selected from a list of 23103 Experts worldwide ranked by ideXlab platform
Alessandro Moura Zagatto - One of the best experts on this subject based on the ideXlab platform.
-
cycling performance enhancement after drop jumps may be attributed to postactivation potentiation and increased Anaerobic Capacity
Journal of Strength and Conditioning Research, 2020Co-Authors: Rodrigo Araujo Bonetti Poli, Daniel A Boullosa, Elvis De Souza Malta, David G Behm, Vithor H F Lopes, Fabio Augusto Barbieri, Alessandro Moura ZagattoAbstract:de Poli, RAB, Boullosa, DA, Malta, ES, Behm, D, Lopes, VHF, Barbieri, FA, and Zagatto, AM. Cycling performance enhancement after drop jumps may be attributed to postactivation potentiation and increased Anaerobic Capacity. J Strength Cond Res 34(9): 2465-2475, 2020-The study aimed to investigate the effects of drop jumps (DJs) on supramaximal cycling performance, Anaerobic Capacity (AC), electromyography, and fatigue. Thirty-eight recreational cyclists participated into 3 independent studies. In study 1 (n = 14), neuromuscular fatigue was assessed with the twitch interpolation technique. In study 2 (n = 16), the AC and metabolic contributions were measured with the maximal accumulated oxygen deficit method and the sum of the glycolytic and phosphagen pathways. In study 3 (n = 8), postactivation potentiation (PAP) induced by repeated DJs was evaluated. The DJ protocol was effective for significantly improving cycling performance by +9.8 and +7.4% in studies 1 and 2, respectively (p ≤ 0.05). No differences were observed in electromyography between conditions (p = 0.70); however, the force evoked by a doublet at low (10 Hz) and high frequencies (100 Hz) declined for control (-16.4 and -23.9%) and DJ protocols (-18.6 and -26.9%) (p < 0.01). Force decline was greater in the DJ condition (p < 0.03). Anaerobic Capacity and glycolytic pathway contributions were +7.7 and +9.1% higher after DJ protocol (p = 0.01). Peak force during maximal voluntary contraction (+5.6%) and doublet evoked force at 100 Hz (+5.0%) were higher after DJs. The DJ protocol induced PAP, improved supramaximal cycling performance, and increased AC despite higher peripheral fatigue.
-
3 min all out effort on cycle ergometer is valid to estimate the Anaerobic Capacity by measurement of blood lactate and excess post exercise oxygen consumption
European Journal of Sport Science, 2019Co-Authors: Alessandro Moura Zagatto, Paulo Eduardo Redkva, Rodrigo De Araujo Bonetti De Poli, Joel Abraham Martinez Gonzalez, Jeniffer Zanetti Brandani, Thiago Penedo, Romulo BertuzziAbstract:The purpose of this study was to investigate the use of a single 3-min all-out maximal effort to estimate Anaerobic Capacity (AC) through the lactate and excess post-exercise oxygen consumption (EP...
-
creatine supplementation improves phosphagen energy pathway during supramaximal effort but does not improve Anaerobic Capacity or performance
Frontiers in Physiology, 2019Co-Authors: Rodrigo Araujo Bonetti Poli, Romulo Bertuzzi, Elvis De Souza Malta, Luan Henrique Roncada, Guilherme Giannini Artioli, Alessandro Moura ZagattoAbstract:This study aimed to investigate the effects of short-duration creatine monohydrate supplementation on Anaerobic Capacity, Anaerobic energy pathways, and time-to-exhaustion during high-intensity running. Fourteen healthy men underwent a graded exercise test followed by a "V" "O" _"2max" confirmation test, 5 submaximal efforts, and 4 supramaximal running bouts at 115% of "V" "O" _"2max" intensity (the first two supramaximal sessions were applied as familiarization trials) to measure the Anaerobic Capacity using two procedures; the maximum accumulated oxygen deficit (MAOD) and non-oxidative pathways energetics sum (AC[La-]+EPOCfast). The investigation was conducted in a single-blind and placebo-controlled manner, with participants performing the efforts first after being supplemented with a placebo (dextrose 20 g·day-1 for 5 days), and then, after a 7-day “placebo” washout period, they started the same procedure under creatine supplementation (20 g·day-1 for 5 days. This order was chosen due to the prolonged washout of creatine. MAOD was not different between placebo (3.35±0.65 L) and creatine conditions (3.39±0.79 L) (P=0.58) and presented a negligible effect [effect size (ES)=0.08], similar to, AC[La-]+EPOCfast (placebo condition=(3.66±0.79 Land under creatine ingestion =3.82 ± 0.85 L)(P=0.07) presenting a small effect (ES=0.20). The energetics from the phosphagen pathway increased significantly after creatine supplementation (1.66 ± 0.40 L) compared to the placebo condition (1.55±0.42 L) (P=0.03). However, the glycolytic and oxidative pathways were not different between conditions. Furthermore, time to exhaustion did not differ between placebo (160.79 ± 37.76 s) and creatine conditions (163.64 ± 38.72) (P= 0.49). Therefore, we can conclude that creatine supplementation improves the phosphagen energy contribution, but with no statistical effect on Anaerobic Capacity or time to exhaustion in supramaximal running.
-
effects of caffeine ingestion on Anaerobic Capacity in a single supramaximal cycling test
Frontiers in Nutrition, 2018Co-Authors: Willian Eiji Miyagi, Rodrigo Araujo Bonetti Poli, Romulo Bertuzzi, Fabio Yuzo Nakamura, Alessandro Moura ZagattoAbstract:The aim of this study was to verify the effects of caffeine on Anaerobic Capacity estimated by the sum of the estimated glycolytic [E[La]] and phosphagen [EPCr] metabolism based on blood lactate and excess post-oxygen consumption responses (AC[La-]+EPOCfast). Fourteen male cyclists were submitted to a graded exercise test to determine the maximal oxygen uptake ("V" "O" _"2max" ) and intensity associated with(" V" ) "O" _"2max" (i"V" "O" _"2max" ). Subsequently, the participants performed two supramaximal efforts at 115% of i"V" "O" _"2max" to determine the AC[La-]+EPOCfast, after previous supplementation with caffeine (6 mg·kg-1) or a placebo (dextrose), in a cross over, randomized, double blind, and placebo-controlled design. The time to exhaustion was higher in the caffeine (186.6±29.8s) than the placebo condition (173.3±25.3s) (p=0.006) and significant correlations were found (r=0.86; P=0.00008). Significant differences were not found between AC[La-]+EPOCfast values from the placebo (4.06±0.83L and 55.2±5.7mL·kg-1) and caffeine condition (4.00±0.76L and 54.6±5.4mL·kg-1), however significant correlations were observed only for absolute values (r=0.74; p<0.002). The E[La] and EPCr also presented no significant differences and were significantly correlated. We conclude based on the overall comparison of mean values between two treatments that acute caffeine ingestion improves the time to exhaustion but does not affect Anaerobic Capacity estimation; however, the effect of caffeine on the performance and Anaerobic Capacity depend on the individual.
-
Anaerobic Capacity estimated by the sum of both oxygen equivalents from the glycolytic and phosphagen pathways is dependent on exercise mode running versus cycling
PLOS ONE, 2018Co-Authors: Paulo Eduardo Redkva, Willian Eiji Miyagi, Fabio Milioni, Alessandro Moura ZagattoAbstract:The purpose of this study was to verify whether the exercise modality (i.e., running and cycling) alters the magnitude of “Anaerobic” Capacity estimated by a single supramaximal effort (AC[La]+EPOCfast). Fourteen healthy men (age: 26±9 years) underwent a maximum incremental test and a supramaximal effort to exhaustion at 115% of the intensity associated with maximal oxygen uptake to determine the AC[La]+EPOCfast (i.e., the sum of both oxygen equivalents from the glycolytic and phosphagen pathways), performed on both a treadmill and cycle ergometer. The maximal oxygen uptake during running was higher (p = 0.001; large effect size) vs. cycling (48.9±3.9mL·kg-1·min-1 vs. 44.8±5.5mL·kg-1·min-1 respectively). Contrarily, the oxygen equivalent from the glycolytic metabolism was not different between exercise modalities (p = 0.133; small effect size; running = 2.35±0.48 L and cycling = 2.18±0.58 L). Furthermore, the “Anaerobic” Capacity was likely meaning fully (3.65±0.70 L) and very likely meaningfully (949.1±5.7 mL·kg-1) greater in running than cycling (3.81±0.71 L and 52.0±8.1 mL·kg-1). Additionally, the contribution of the phosphagen metabolism was higher (p = 0.001; large effect size) for running compared to cycling (1.6±0.3 L vs.1.3±0.3 L respectively). Therefore, the “Anaerobic” Capacity estimated by the sum of both oxygen equivalents from the glycolytic and phosphagen pathways during a supramaximal effort is influenced by exercise modality and is able to identify the difference in phosphagen metabolic contribution, based on the methodological conditions of this study.
Bouwien C M Smitsengelsman - One of the best experts on this subject based on the ideXlab platform.
-
psychometric properties of field based Anaerobic Capacity tests in children with developmental coordination disorder
Disability and Rehabilitation, 2019Co-Authors: Emmanuel Bonney, Wendy Aertssen, Bouwien C M SmitsengelsmanAbstract:Background: Assessment of Anaerobic Capacity in children with Developmental Coordination Disorder (DCD) is essential for treatment planning. However, available field-based measures have no establis...
-
performance on functional strength measurement and muscle power sprint test confirm poor Anaerobic Capacity in children with developmental coordination disorder
Research in Developmental Disabilities, 2016Co-Authors: Wendy Aertssen, Gillian Ferguson, Bouwien C M SmitsengelsmanAbstract:Abstract Background There is little and conflicting information about Anaerobic performance and functional strength in children with Developmental Coordination Disorder (DCD). Aims To investigate Anaerobic Capacity and functional strength in children with a clinical diagnosis of DCD (clin-DCD) and if differences were larger in older (age 7–10 years) compared to younger children (age 4–6 years). Furthermore to determine the percentage of children with clin-DCD that scored Method A clin-DCD group (36 boys, 11 girls, mean age: 7y 1mo, SD = 2y 1mo) and a typically developing group (TD) (57 boys, 53 girls, mean age: 7y 5mo, SD = 1y 10mo) were compared on Muscle Power Sprint Test (MPST) and Functional Strength Measurement (FSM). Results Children with clin-DCD performed poorer on the MPST and FSM, especially on the muscle endurance items of the FSM. The differences were larger in the older children compared to the younger on the cluster muscle endurance and the FSM total score. Over 50% of clin-DCD group scored Interpretation Differences between children with clin-DCD and TD children are even more pronounced in the older children, especially when tested on items requiring fast repetitive movements.
Carl Foster - One of the best experts on this subject based on the ideXlab platform.
-
the effects of high intensity interval training vs steady state training on aerobic and Anaerobic Capacity
Journal of Sports Science and Medicine, 2015Co-Authors: Carl Foster, Courtney V Farland, Flavia Guidotti, Michelle M Harbin, Brianna Roberts, Jeff Schuette, Andrew Tuuri, Scott Doberstein, John P PorcariAbstract:High intensity interval training (HIIT) has become an increasingly popular form of exercise due to its potentially large effects on exercise Capacity and small time requirement. This study compared the effects of two HIIT protocols vs steady-state training on aerobic and Anaerobic Capacity following 8-weeks of training. Fifty-five untrained college-aged subjects were randomly assigned to three training groups (3x weekly). Steady-state (n = 19) exercised (cycle ergometer) 20 minutes at 90% of ventilatory threshold (VT). Tabata (n = 21) completed eight intervals of 20s at 170% VO2max/10s rest. Meyer (n = 15) completed 13 sets of 30s (20 min) @ 100% PVO2 max/ 60s recovery, average PO = 90% VT. Each subject did 24 training sessions during 8 weeks.There were significant (p < 0.05) increases in VO2max (+19, +18 and +18%) and PPO (+17, +24 and +14%) for each training group, as well as significant increases in peak (+8, + 9 and +5%) & mean (+4, +7 and +6%) power during Wingate testing, but no significant differences between groups. Measures of the enjoyment of the training program indicated that the Tabata protocol was significantly less enjoyable (p < 0.05) than the steady state and Meyer protocols, and that the enjoyment of all protocols declined (p < 0.05) across the duration of the study. The results suggest that although HIIT protocols are time efficient, they are not superior to conventional exercise training in sedentary young adults. Key pointsSteady state training equivalent to HIIT in untrained studentsMild interval training presents very similar physiologic challenge compared to steady state trainingHIIT (particularly very high intensity variants were less enjoyable than steady state or mild interval trainingEnjoyment of training decreases across the course of an 8 week experimental training program.
-
the effects of high intensity interval training vs steady state training on aerobic and Anaerobic Capacity
Journal of Sports Science and Medicine, 2015Co-Authors: Carl Foster, Courtney V Farland, Flavia Guidotti, Michelle M Harbin, Brianna Roberts, Jeff Schuette, Andrew Tuuri, Scott Doberstein, John P PorcariAbstract:High intensity interval training (HIIT) has become an increasingly popular form of exercise due to its potentially large effects on exercise Capacity and small time requirement. This study compared the effects of two HIIT protocols vs steady-state training on aerobic and Anaerobic Capacity following 8-weeks of training. Fifty-five untrained college-aged subjects were randomly assigned to three training groups (3x weekly). Steady-state (n = 19) exercised (cycle ergometer) 20 minutes at 90% of ventilatory threshold (VT). Tabata (n = 21) completed eight intervals of 20s at 170% VO2max/10s rest. Meyer (n = 15) completed 13 sets of 30s (20 min) @ 100% PVO2 max/ 60s recovery, average PO = 90% VT. Each subject did 24 training sessions during 8 weeks. Results: There were significant (p < 0.05) increases in VO2max (+19, +18 and +18%) and PPO (+17, +24 and +14%) for each training group, as well as significant increases in peak (+8, + 9 and +5%) & mean (+4, +7 and +6%) power during Wingate testing, but no significant differences between groups. Measures of the enjoyment of the training program indicated that the Tabata protocol was significantly less enjoyable (p < 0.05) than the steady state and Meyer protocols, and that the enjoyment of all protocols declined (p < 0.05) across the duration of the study. The results suggest that although HIIT protocols are time efficient, they are not superior to conventional exercise training in sedentary young adults. Key points Steady state training equivalent to HIIT in untrained students Mild interval training presents very similar physiologic challenge compared to steady state training HIIT (particularly very high intensity variants were less enjoyable than steady state or mild interval training Enjoyment of training decreases across the course of an 8 week experimental training program
-
Anaerobic Capacity effect of computational method
International Journal of Sports Medicine, 2011Co-Authors: Dionne A Noordhof, Ankie Vink, J J De Koning, Carl FosterAbstract:Anaerobic Capacity (AnC) can be estimated by subtracting VO 2 consumed from VO 2 demand, which can be estimated from multiple submaximal exercise bouts or by gross efficiency (GE), requiring one submaximal bout. This study compares AnC using the MAOD and GE method. The precision of estimated VO 2 demand and AnC, determined by MAOD using 3 power output – VO 2 regressions, based on VO 2 from min 8–10 (10 − Y), during min 4 without (4 − Y) and with forced y-intercept (4+Y), and from GE was evaluated by the 95% confidence interval (CI). Well-trained males (n=15) performed submaximal exercise tests to establish VO 2 demand with the MAOD and GE method. To determine AnC subjects completed a constant power output trial. The 3 MAOD procedures and GE method had no significant difference for VO 2 demand and AnC. The 4+Y MAOD procedure and GE method resulted in a smaller 95% CI of VO 2 demand and AnC than the 10 − Y ( P<0.05; P<0.01) and 4 – Y ( P<0.001; P<0.01) MAOD procedures. Therefore, the 4+Y MAOD procedure and GE method are preferred for estimating AnC, but as individual differences exist, they cannot be used interchangeably.
-
the maximal accumulated oxygen deficit method a valid and reliable measure of Anaerobic Capacity
Sports Medicine, 2010Co-Authors: Dionne A Noordhof, Jos J De Koning, Carl FosterAbstract:The maximal accumulated oxygen deficit (MAOD) method has been extensively, but unfortunately not very methodically, used; the procedure used to determine the MAOD varies considerably. Therefore, this review evaluates the effect of different numbers and durations of submaximal exercise bouts on the linear power output (PO)-oxygen uptake ((.)VO2) relationship and thus the MAOD. Changing the number and duration of the submaximal exercise bouts substantially influences the calculated MAOD when relatively long submaximal exercise bouts are used and no fixed value of the y-intercept is forced into the linear regression line. This is most likely due to non-linearity of the PO-(.)VO2 relationship for exercise intensities above the lactate threshold (LT). Non-linearity of the PO-(.)VO2 relationship is probably caused by the development of a slow component in (.)VO2 during submaximal exercise at intensities above the LT. Thus, it is important to standardize the number, duration and intensity of submaximal exercise bouts necessary to establish the PO-(.)VO2 relationship. Beyond changing the number and duration of the submaximal exercise bouts, the effect of different supramaximal exercise bouts on the calculated MAOD has been investigated. While it has become clear that different exercise protocols result in relatively similar values of the MAOD, a closer look at individual data suggests that it may be important to choose an exercise protocol that is representative of the athlete's event. The validity of the MAOD method was studied by different authors comparing the MAOD with metabolic measurements of Anaerobic adenosine triphosphate (ATP) production. The main limitation with the metabolic measurements of Anaerobic ATP production from muscle biopsy data is that the active muscle mass is unknown, which makes it hard to accurately study the validity of the MAOD method. From the studies that evaluated the reliability of the MAOD method it is clear that the MAOD method may not be a reliable measure of Anaerobic Capacity. From these findings it can be concluded that the MAOD method may have limitations as a valid and reliable measure of Anaerobic Capacity and needs to be further improved. We suggest the use of 10 x 4 minute submaximal exercise bouts and a fixed value of the y-intercept for the construction of the linear PO-(.)VO2 relationship, after which the MAOD can be determined during a supramaximal exercise protocol specific for the athlete's event. This method will lead to a more robust PO-(.)VO2 relationship and will therefore result in more valid and reliable results.
Clare Minahan - One of the best experts on this subject based on the ideXlab platform.
-
Strength training improves supramaximal cycling but not Anaerobic Capacity
European Journal of Applied Physiology, 2008Co-Authors: Clare Minahan, Catherine WoodAbstract:This study examined supramaximal cycling performed to exhaustion at 120% of peak O_2 uptake (120% VO_2peak) before and after 8 weeks of strength training. Eight previously untrained men completed 8 weeks of leg-strength training 3 days week^−1 on a hack-squat machine; four sets, five repetitions at 85% of one repetition maximum each session. Anaerobic Capacity was quantified by determining the maximal accumulated O_2 deficit during supramaximal cycling. After 8 weeks of strength training, one repetition maximum for the hack squat significantly increased by 90 ± 33% when compared to before training. However, 8 weeks of strength training did not increase the maximal accumulated O_2 deficit. Nevertheless, after 8 weeks of strength training, there was a significant increase in time to exhaustion for cycling at 120% VO_2peak. The increase in time to exhaustion after 8 weeks of strength training was accompanied by a significant increase in accumulated O_2 uptake. In conclusion, 8 weeks of strength training improves supramaximal cycling performance in previously untrained subjects. However, increases in time to exhaustion for supramaximal cycling following strength training are associated with an increase in the contribution of the aerobic energy system rather than an improvement in Anaerobic Capacity.
-
does power indicate Capacity 30 s wingate Anaerobic test vs maximal accumulated o2 deficit
International Journal of Sports Medicine, 2007Co-Authors: Clare Minahan, Michael Chia, Omri InbarAbstract:The purpose of this study was to evaluate the relationship between Anaerobic power and Capacity. Seven men and seven women performed a 30-s Wingate Anaerobic Test on a cycle ergometer to determine peak power, mean power, and the fatigue index. Subjects also cycled at a work rate predicted to elicit 120 % of peak oxygen uptake to exhaustion to determine the maximal accumulated O (2) deficit. Peak power and the maximal accumulated O (2) deficit were significantly correlated (r = 0.782, p = 0.001). However, when the absolute difference in exercise values between groups (men and women) was held constant using a partial correlation, the relationship diminished (r = 0.531, p = 0.062). In contrast, we observed a significant correlation between fatigue index and the maximal accumulated O (2) deficit when controlling for gender (r = - 0.597, p = 0.024) and the relationship remained significant when values were expressed relative to active muscle mass. A higher Anaerobic power does not indicate a greater Anaerobic Capacity. Furthermore, we suggest that the ability to maintain power output during a 30-s cycle sprint is related to Anaerobic Capacity.
Kaoru Yamamoto - One of the best experts on this subject based on the ideXlab platform.
-
effects of moderate intensity endurance and high intensity intermittent training on Anaerobic Capacity and vo2max
Medicine and Science in Sports and Exercise, 1996Co-Authors: Izumi Tabata, Kouji Nishimura, Motoki Kouzaki, Yuusuke Hirai, Futoshi Ogita, Motohiko Miyachi, Kaoru YamamotoAbstract:This study consists of two training experiments using a mechanically braked cycle ergometer. First, the effect of 6 wk of moderate-intensity endurance training (intensity: 70% of maximal oxygen uptake (VO2max), 60 min.d-1, 5 d.wk-1) on the Anaerobic Capacity (the maximal accumulated oxygen deficit) and VO2max was evaluated. After the training, the Anaerobic Capacity did not increase significantly (P > 0.10), while VO2max increased from 53 +/- 5 ml.kg-1 min-1 to 58 +/- 3 ml.kg-1.min-1 (P < 0.01) (mean +/- SD). Second, to quantify the effect of high-intensity intermittent training on energy release, seven subjects performed an intermittent training exercise 5 d.wk-1 for 6 wk. The exhaustive intermittent training consisted of seven to eight sets of 20-s exercise at an intensity of about 170% of VO2max with a 10-s rest between each bout. After the training period, VO2max increased by 7 ml.kg-1.min-1, while the Anaerobic Capacity increased by 28%. In conclusion, this study showed that moderate-intensity aerobic training that improves the maximal aerobic power does not change Anaerobic Capacity and that adequate high-intensity intermittent training may improve both Anaerobic and aerobic energy supplying systems significantly, probably through imposing intensive stimuli on both systems.