Fatigue Index vs Peak Power as an Accurate Predictor of Mountain Biking Performance in High School Mountain Bike Athletes

2015 ◽  
Vol 47 ◽  
pp. 196-197
Author(s):  
Jade Fackler ◽  
Kirsten Boyer ◽  
Ryan C. Luke ◽  
Kent J. Adams
Keyword(s):  
High School ◽  
Peak Power ◽  
Mountain Biking ◽  
Mountain Bike ◽  
Fatigue Index ◽  
Accurate Predictor

scholarly journals Validity of the RAST for evaluating anaerobic power performance as compared to Wingate test in cycling athletes

2013 ◽  
Vol 19 (4) ◽  
pp. 696-702
Author(s):  
Marcos Roberto Queiroga ◽  
Timothy Gustavo Cavazzotto ◽  
Keyla Yukari Katayama ◽  
Bruno Sérgio Portela ◽  
Marcus Peikriszwili Tartaruga ◽  
...  
Keyword(s):  
Linear Correlation ◽  
Strong Correlation ◽  
Peak Power ◽  
Anaerobic Power ◽  
Wingate Test ◽  
Power Performance ◽  
Mountain Bike ◽  
Fatigue Index ◽  
Mean Power ◽  
Paired T Test

The validity of the Running-based Anaerobic Sprint Test (RAST) was investigated to evaluate the anaerobic power performance in comparison to Wingate test in cycling athletes. Ten mountain-bike male cyclists (28.0±7.3 years) randomly performed Wingate Test and RAST with two trials each. After several anthropometric measurements, peak power (PP), mean power (MP) and fatigue index (FI) for RAST and Wingate Test were analyzed using Student's paired t-test, Pearson's linear correlation test (r) and Bland and Altman's plots. Results showed that, with the exception of FI (33.8±4.6% vs. 37.8±7.9%; r=0.172), significant differences were detected between the Wingate and RAST tests with regard to PP and MP. Although there was a strong correlation for PP and MP, or rather, 0.831 and 0.714 respectively, agreement of analysis between Wingate and RAST protocols was low. The above suggested that RAST was not appropriate to evaluate the performance of anaerobic power by Wingate test in cycling athletes.

scholarly journals The National Interscholastic Cycling Association (NICA) Mountain Biking Injury Surveillance System (ISS): Analysis of 66,588 Student Athlete-Years of Injury Data

2021 ◽  
Vol 18 (11) ◽  
pp. 5856
Author(s):  
Meredith Ehn ◽  
Masaru Teramoto ◽  
Daniel M. Cushman ◽  
Kristen Saad ◽  
Stuart Willick
Keyword(s):  
Surveillance System ◽  
Student Athletes ◽  
The United States ◽  
Injury Surveillance ◽  
Mountain Biking ◽  
Student Athlete ◽  
Mountain Bike ◽  
Injury Surveillance System ◽  
Injury Characteristics ◽  
Mountain Bike Racing

Interscholastic youth cross-country mountain bike racing in the United States has grown significantly over the past decade, yet little is known about the risk profile in this age group. Aiming to protect participants, we implemented a prospective, longitudinal injury surveillance system for the purpose of better understanding youth mountain biking injuries and implementing safety measures. Data were collected during competition years 2018–2020, totaling 66,588 student athlete-years. Designated reporters from each team received weekly emails with exposure and incident report forms. Variables analyzed included demographic, rider-related, trail-related, and other data. Injury characteristics during the COVID-19 pandemic in 2020 were compared to the years 2018 and 2019. More student athletes participated in the 2020 season (25,261) than in prior seasons (18,575 in 2018 and 22,752 in 2019). During competition year 2020, overall injury proportion was lower (1.7% versus 3.0% in 2018 and 2.7% in 2019). Variables associated with injury, body part injured, type of injury, time-loss, and disposition following injury were similar between all years. Despite the pandemic and resultant changes to competition, student athletes continued to ride their bikes and become injured, but the proportion of injuries differed. This report details injury characteristics in youth mountain bike racing, including a comparison of before and during the pandemic.

Carbohydrate Drink Use During 30 Minutes of Variable-Intensity Exercise Has No Effect on Exercise Performance in Premenarchal Girls

2021 ◽  
Vol 33 (2) ◽  
pp. 65-69
Author(s):  
C. Eric Heidorn ◽  
Brandon J. Dykstra ◽  
Cori A. Conner ◽  
Anthony D. Mahon
Keyword(s):  
Peak Power ◽  
Perceived Exertion ◽  
Rating Of Perceived Exertion ◽  
Fatigue Index ◽  
Mean Power ◽  
Variable Intensity ◽  
Performance Effects ◽  
Power Peak ◽  
The Mean ◽  
And Performance

Purpose: This study examined the physiological, perceptual, and performance effects of a 6% carbohydrate (CHO) drink during variable-intensity exercise (VIE) and a postexercise test in premenarchal girls. Methods: A total of 10 girls (10.4 [0.7] y) participated in the study. VO2peak was assessed, and the girls were familiarized with VIE and performance during the first visit. The trial order (CHO and placebo) was randomly assigned for subsequent visits. The drinks were given before VIE bouts and 1-minute performance (9 mL/kg total). Two 15-minute bouts of VIE were completed (10 repeated sequences of 20%, 55%, and 95% power at VO2peak and maximal sprints) before a 1-minute performance sprint. Results: The mean power, peak power, heart rate (HR), %HRpeak, and rating of perceived exertion during VIE did not differ between trials. However, the peak power decreased, and the rating of perceived exertion increased from the first to the second bout. During the 1-minute performance, there were no differences between the trial (CHO vs placebo) for HR (190 [9] vs 189 [9] bpm), %HRpeak (97.0% [3.2%] vs 96.6% [3.0%]), rating of perceived exertion (7.8 [2.3] vs 8.1 [1.9]), peak power (238 [70] vs 235 [60] W), fatigue index (54.7% [10.0%] vs 55.9% [12.8%]), or total work (9.4 [2.6] vs 9.4 [2.1] kJ). Conclusion: CHO supplementation did not alter physiological, perceptual, or performance responses during 30 minutes of VIE or postexercise sprint performance in premenarchal girls.

scholarly journals Does Post-Activation Potentiation Protocols affect Anaerobic Performance in women Taolu Wushu Athletes?

2021 ◽  
Author(s):  
José Afonso ◽  
Hengameh Moradian ◽  
Rasoul Eslami ◽  
Alexandre Martins ◽  
Abdolhossein Parnow
Keyword(s):  
Peak Power ◽  
Performance Enhancement ◽  
Anaerobic Performance ◽  
Fatigue Index ◽  
Short Term ◽  
Mean Power ◽  
Significant Difference ◽  
Strength Based ◽  
Rest Time ◽  
Lactate Levels

Abstract Introduction: Post-activation potentiation has an influence on short duration and high intensity function. This study aimed to answer this question whether post-activation potentiation protocol in different models has effect on anaerobic performance in women Wushu athletes. Methods: Women elite Taolu Wushu athletes participated in current crossover design study. (i) specific Wushu WU (Wushu WU); (ii) Strength-based WU (StreWU); and (iii) Speed-based WU (SpeWU) were performed by Wushu athletes in three inconsecutive days separated by 48 h. Five minutes after each WU protocols, Running-Based Anaerobic Sprint Test (RAST) was performed. Heart rate, immediately, and blood lactate were measured for 4 times: before WU protocols, immediately after WU protocols, before RAST, immediately after RAST.Results: Data analysis revealed significant differences in 4 time points of lactate levels (p=0.001; d=1.71), although no significant difference among protocols was observed. Values of variables obtained from RAST showed that StreWU had a significant impact on minimum power (p<0.05; d=-0.795) comparing to WushuWU and on fatigue index comparing to SpeWU (p<0.05; d=-0.799). No significant differences were found among the WU protocols for peak power and mean power.Conclusion: All WU protocols had mostly the same effect, and PAP was not very effective. Possibly, the WU protocols generated too much fatigue, due to the short-term rest time. However, longer intervals would likely enter the realm of post-activation performance enhancement, which is distinct from PAP.

scholarly journals Mountain bike tourism economic impacts: A critical analysis of academic and practitioner studies

2020 ◽  
pp. 135481662090195 ◽  
Author(s):  
Richard J Buning ◽  
Matthew Lamont
Keyword(s):  
Critical Analysis ◽  
Economic Impacts ◽  
Financial Assistance ◽  
Future Research ◽  
Mountain Biking ◽  
Recreational Activity ◽  
Mountain Bike ◽  
Tourism Impacts ◽  
Body Of Knowledge ◽  
Variable Measurement

Mountain biking as a sport and recreational activity has grown rapidly over the previous two decades. Consequently, there has been growth recently in efforts aimed at stimulating mountain bike tourism through the development and marketing of mountain bike trails and parks. Various community advocates, academics, and industry practitioners have sought to quantify the economic impacts of mountain bike tourism to garner public and other financial assistance to aid the development of mountain bike tourism. This research critically reviewed 33 academic and practitioner studies reporting on mountain bike tourism economic impacts. Analysis revealed widespread inconsistency in instrumentation and variable measurement contributing to a fragmented body of knowledge pertaining to economic impacts of mountain bike tourism. Recommendations for improved rigor and consistency in future research measuring mountain bike tourism impacts are provided.

Composite versus single transportable carbohydrate solution enhances race and laboratory cycling performance

2012 ◽  
Vol 37 (3) ◽  
pp. 425-436 ◽  
Author(s):  
David S. Rowlands ◽  
Marilla Swift ◽  
Marjolein Ros ◽  
Jackson G. Green
Keyword(s):  
High Intensity ◽  
Peak Power ◽  
Endurance Performance ◽  
Cycling Performance ◽  
Mountain Bike ◽  
Gastrointestinal Discomfort ◽  
Recorded Data ◽  
Intestinal Transporters ◽  
Maltodextrin Solution ◽  
Carbohydrate Solution

When ingested at high rates (1.8–2.4 g·min–1) in concentrated solutions, carbohydrates absorbed by multiple (e.g., fructose and glucose) vs. single intestinal transporters can increase exogenous carbohydrate oxidation and endurance performance, but their effect when ingested at lower, more realistic, rates during intermittent high-intensity endurance competition and trials is unknown. Trained cyclists participated in two independent randomized crossover investigations comprising mountain-bike races (average 141 min; n = 10) and laboratory trials (94-min high-intensity intervals followed by 10 maximal sprints; n = 16). Solutions ingested during exercise contained electrolytes and fructose + maltodextrin or glucose + maltodextrin in 1:2 ratio ingested, on average, at 1.2 g carbohydrate·kg–1·h–1. Exertion, muscle fatigue, and gastrointestinal discomfort were recorded. Data were analysed using mixed models with gastrointestinal discomfort as a mechanism covariate; inferences were made against substantiveness thresholds (1.2% for performance) and standardized difference. The fructose–maltodextrin solution substantially reduced race time (–1.8%; 90% confidence interval = ±1.8%) and abdominal cramps (–8.1 on a 0–100 scale; ±6.6). After accounting for gastrointestinal discomfort, the effect of the fructose–maltodextrin solution on lap time was reduced (–1.1%; ±2.4%), suggesting that gastrointestinal discomfort explained part of the effect of fructose–maltodextrin on performance. In the laboratory, mean sprint power was enhanced (1.4%; ±0.8%) with fructose–maltodextrin, but the effect on peak power was unclear (0.7%; ±1.5%). Adjusting out gastrointestinal discomfort augmented the fructose–maltodextrin effect on mean (2.6%; ±1.9%) and peak (2.5%; ±3.0%) power. Ingestion of multiple transportable vs. single transportable carbohydrates enhanced mountain-bike race and high-intensity laboratory cycling performance, with inconsistent but not irreconcilable effects of gut discomfort as a possible mediating mechanism.

Effect of Wingate Start Procedure on Peak Power, Average Power, and Fatigue Index

2014 ◽  
Vol 46 ◽  
pp. 833
Author(s):  
Taylor S. Thurston ◽  
Anthony B. Ciccone ◽  
Xavier Avila ◽  
Barry A. Spiering ◽  
Daniel A. Judelson
Keyword(s):  
Peak Power ◽  
Average Power ◽  
Fatigue Index

Long-distance mountain biking does not disturb the measurement of total, free or complexed prostate-specific antigen in healthy men

2004 ◽  
Vol 42 (3) ◽  
Author(s):  
Markus Herrmann ◽  
Jürgen Scharhag ◽  
Marga Sand-Hill ◽  
Wilfried Kindermann ◽  
Wolfgang Herrmann
Keyword(s):  
Prostate Specific Antigen ◽  
Endurance Exercise ◽  
Specific Antigen ◽  
Serum Levels ◽  
Normal Serum ◽  
Mountain Biking ◽  
Mountain Bike ◽  
Long Distance ◽  
Healthy Men ◽  
Before And After

AbstractPurpose: Mechanical manipulation of the prostate is a generally accepted interfering factor for the measurement of prostate-specific antigen (PSA). However, only few studies have focused on common daily mechanical manipulations, such as bicycle riding. Furthermore, physical exercise is also supposed to modulate PSA serum concentration. Long-distance mountain biking is an excellent model to study the combined effect of mechanical prostate manipulation by bicycle riding and strenuous endurance exercise on total, free and complexed PSA (tPSA, fPSA, cPSA). Materials and methods: We investigated tPSA, fPSA and cPSA in 42 healthy male cyclists (mean age 35±6 years) before and after a 120 km off-road mountain bike race. Blood sampling was done before, 15 min and 3 h after the race. Results: Mean race time was 342±65 min. All athletes had normal serum levels of tPSA, fPSA or cPSA. None of these parameters was modified by the race. Conclusions: In healthy men the measurement of tPSA, fPSA and cPSA is not disturbed by preceding long distance mountain biking or endurance exercise. Based on the present data, there is no evidence for a recommendation to limit bicycle riding or physical activity before the measurement of tPSA, fPSA or cPSA.

scholarly journals Pacing strategy during cross-country short track mountain bike event

2021 ◽  
Author(s):  
Rhaí André Arriel ◽  
Moacir Marocolo
Keyword(s):  
Mountain Biking ◽  
Mountain Bike ◽  
Pacing Strategy ◽  
Performance Group ◽  
Technical Ability ◽  
Group 4 ◽  
Cross Country ◽  
Main Determinants ◽  
Race Performance ◽  
Group 1

Abstract Although in recent years, cross-country short track (XCC) mountain biking became more popular among athletes and coaches, no study has analyzed the main determinants of performance in this modality. Thus, this study investigates performance and pacing profile of professional cross-country cyclists on different technical sections during a XCC competition. Twenty male professional cross-country cyclists (25.9 ± 5.4 years; eight under 23 and twelve elite), performed 6 laps of a XCC 2020 UCI International Mountain Bike Cup. Average speed (lap by lap and in five different technical sections of the track) were analyzed according to athletes, categories and race performance group. For race performance analyses, cyclists were divided into 4 groups (1-4; n=5 each), according to total race time, presenting group 1 the better performance. In general, XCC athletes adopted a positive pacing profile during competition but no differences in speed over the race or in each circuit section were found between categories (p > 0.05). Race performance groups adopted different pacing profiles: group 1 maintained a more even pacing profile, groups 2 and 3 adopted a positive pacing profile and group 4 adopted a reverse J-shaped pacing profile. No difference in speed was found between categories across track sections. Group 1 was 17.9% and 8.3% faster than the group 4 (p < 0.05) on the non-technical uphill section and more technical uphill/downhill section, respectively. A general positive pacing profile during XCC is adopted by the mainly of athletes and this choice of pacing profile is influenced by race performance, regardless of cyclist category. Furthermore, physical fitness is more relevant than technical ability in this competition.

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