Relationship between starting and finishing position in World Cup BMX racing

Rylands, Lee; Roberts, Simon J.

doi:10.1080/24748668.2014.11868699

Cited by 13 publications

(9 citation statements)

References 14 publications

(24 reference statements)

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“…One of the observations in their study was that the rate of force applied to the pedals was crucial as it had a direct effect on the start phase of a BMX race. The importance of the start of a BMX race on the overall race outcome was noted by Rylands and Roberts (2014). The authors analysed four UCI world cup events in 2012 using data from 348 riders across 175 elite BMX races.…”

Section: Discussionmentioning

confidence: 99%

“…The start of a Bicycle Motocross (BMX) race is a crucial aspect of performance, as it has been shown to have a direct correlation to a rider's final finishing position (Rylands & Roberts, 2014). There are a number of reported physiological considerations that contribute towards an optimum start, including peak power, rate of force produced and torque (Rylands, Roberts, Hurst & Bentley, 2015b;Bertucci & Hourde, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Effect of gear ratio on peak power and time to peak power in BMX cyclists

Rylands

Roberts

Hurst

2016

European Journal of Sport Science

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The aim of this study was to ascertain if gear ratio selection would have an effect on peak power and time to peak power production in elite BMX cyclists. Eight male elite BMX riders volunteered for the study. Each rider performed three, 10 second maximal sprints on an Olympic standard indoor BMX track. The riders' bicycles were fitted with a portable SRM power meter. Each rider performed the three sprints using gear ratios of 41/16, 43/16, 45/16 tooth. The results from the 41/16 and 45/16 gear ratios were compared to the current standard 43/16 gear ratio. Statistically significant differences were found between the gear ratios for peak power (F(2,14) = 6.448; p = 0.010) and peak torque (F(2,14) = 4.777; p = 0.026), but no significant difference was found for time to peak power (F (2,14) = 0.200; p = 0.821). When comparing gear ratios, the results showed a 45/16 gear ratio elicited the highest peak power,1658 ± 221 W, compared to 1436 ± 129 W and 1380 ± 56 W, for the 43/16 and 41/16 ratios, respectively. The time to peak power showed a 41/16 tooth gear ratio attained peak power in -0.01 s and a 45/16 in 0.22 s compared to the 43/16. The findings of this study suggest that gear ratio choice has a significant effect on peak power production, though time to peak power output is not significantly affected. Therefore, selecting a higher gear ratio results in riders attaining higher power outputs without reducing their start time.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of gear ratio on peak power and time to peak power in BMX cyclists

Rylands

Roberts

Hurst

2016

European Journal of Sport Science

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“…This gives riders a distinct advantage to best navigate the upcoming obstacles and contribute with a faster finish time (Cowell et al, 2012b). To gain the front position, BMX riders attempt to apply a maximum power effort using the leverage and strength of their upper and lower body (Herman et al, 2009;Mateo et al, 2011;Rylands et al, 2014). Factors that could affect power output such as gear ratio (Rylands et al, 2017b), optimal cadence (Rylands et al, 2017c), and the maximal torque and cadence relationship (Debraux et al, 2013;Gardner et al, 2007) have also been investigated.…”

Section: Introductionmentioning

confidence: 99%

Prediction of track performance in competitive BMX riders using laboratory measures

Daneshfar¹,

Petersen²,

Miles³

et al. 2020

J Sci Cycling

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Identifying key physiological factors is essential in cycling; however, the unique nature of BMX decreases the validity and transferability of research findings from other cycling disciplines. Therefore, this study highlighted the physical and physiological characteristics of BMX riders that could influence track performance. Fifteen sub-elite BMX riders (male n = 12; age 18.3 ± 3.3 and female n = 3; 17.7 ± 5.7 years) undertook a battery of laboratory tests on three different occasions, including body composition, upper and lower body strength, flexibility, sprint and aerobic capacity measures. On a separate day, participants completed three full lap sprints on an outdoor BMX track. Correlation and multiple linear regression analyses were performed to develop predictive models of performance across the laboratory tests and race time. The final model indicated power to weight ratio, relative back-leg-chest strength and arm span explained ~87% of the variability in finish time (adjusted R2 = 0.87, p < .01). These findings highlighted the importance of a multidimensional approach for developing BMX race performance. Coaches should prioritise these variables in their training programs and selection of future talents. However, further physiological and biomechanical investigation is needed to validate current findings, particularly among elite riders.

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“…BMX Race is a sprint discipline with a race time between 30 to 40 s and a track of approximately 400 m. Because of the difficulties to overtake an opponent during the race, the start and the first straight line are crucial and have been shown to be directly correlated with rider's final position (Rylands and Roberts, 2014). The start of the race includes 2.5-3 pedal strokes and race analysis has revealed that riders achieve to be at the end of the bottom ramp at an average speed of 15.2 ± 0.4 m.s À1 within 2.47 ± 0.04 s (Gross et al, 2017).…”

Section: Introductionmentioning

confidence: 99%