Effect of crank length on joint-specific power during maximal cycling.

  title={Effect of crank length on joint-specific power during maximal cycling.},
  author={Paul Richard Barratt and Thomas Korff and Steven J. Elmer and James C. Martin},
  journal={Medicine and science in sports and exercise},
  volume={43 9},
UNLABELLED Previous investigators have suggested that crank length has little effect on overall short-term maximal cycling power once the effects of pedal speed and pedaling rate are accounted for. Although overall maximal power may be unaffected by crank length, it is possible that similar overall power might be produced with different combinations of joint-specific powers. Knowing the effects of crank length on joint-specific power production during maximal cycling may have practical… 

Figures and Tables from this paper

Effects of Pedal Speed and Crank Length on Pedaling Mechanics during Submaximal Cycling

The results increase the understanding of the neural and mechanical mechanisms underlying multi-joint task performance, and they have practical relevance to coaches, athletes, and clinicians.

Effect of crank length on biomechanical parameters and muscle activity during standing cycling

Knee and hip flexion angles and hip power increased at the initiation of pedalling with increasing crank length, while the BF and GM muscle activities increased during propulsion, but the moment at a short crank length during propulsion was comparable to fast walking.

Cycling with Short Crank Lengths Improved Economy in Novices.

Novice endurance athletes utilize slower movements and smaller ranges of motion compared to trained endurance athletes. Novice cyclists have been shown to follow this paradigm via the use of slower

Acute effects of small changes in crank length on gross efficiency and pedalling technique during submaximal cycling

The biomechanical changes due to a longer crank did not alter the metabolic cost of pedalling, although they could have long-term adverse effects, therefore, in case of doubt between two lengths, the shorter one might be recommended.

The effects of localized fatigue in the knee extensors on crankpower and muscle activation

The aim of this study was to investigate the effect of repeated contractions of the left knee extensor muscles on the production of crank power and the activation of the locomotor muscles of both lower limbs during bilateral maximal cycling exercise.

Maximal muscular power: lessons from sprint cycling

Evidence from sprint cycling indicates that brief maximal muscular power production under cyclical conditions can be readily improved via appropriate training, with direct implications for sprint cycling as well as other athletic and health-related pursuits.

Q Factor in cycling: kinematic and physiological effects

Self selected Q Factor (SSQ) was lower than standard in trained cyclists and could be predicted using a simple suspension task, and provided a combination of kinematic stability and increased efficiency, lowering the risk of injury and the oxygen cost of cycling.

The Effect of Pedal Crank Arm Length and Seat Height on Joint Angles in an Upright Cycling Position

The purpose of this investigation was to determine the effect of 5 pedal crank arm lengths and 3 seat height on joint angles of the hip, knee, and ankle, as determined by 3 electrogoniomters in an upright cycling position for male participants.

Biomechanical measures of short-term maximal cycling on an ergometer: a test-retest study.

It is speculated that biological variability may also be a contributor to the lower repeatability observed in several variables including ineffective crank force, ankle kinematics and hamstring muscles' activation patterns.

Noncircular Chainrings Do Not Influence Maximum Cycling Power.

Multiple degrees of freedom in the leg, crank, and pedal system allowed cyclists to manipulate ankle angular velocity to maintain their preferred knee and hip actions, suggesting maximizing extension/flexion and minimizing transition phases may be counterproductive for maximal power.



Determinants of maximal cycling power: crank length, pedaling rate and pedal speed

Data suggest that pedal speed and pedaling rate exert distinct effects that influence muscular power during cycling, and use of the standard 170-mm length cranks should not substantially compromise maximum power in most adults.

Fatigue during maximal sprint cycling: unique role of cumulative contraction cycles.

Power decreased by a similar increment with each crank revolution for the two conditions, indicating that each maximal muscular contraction induced a similar amount of fatigue.

Joint-specific power production and fatigue during maximal cycling.

The effect of bicycle crank-length variation upon power performance.

Optimal CL was shown to depend on leg length, however, within a two crank length span about the optimal crank length MP and PP did not vary by more than 0.77 and 1.24% respectively.

The effect of pedal crank arm length on joint angle and power production in upright cycle ergometry

It is concluded that 35 mm changes in pedal crank arm length significantly alter both hip and knee joint angles and thus affect cycling performance.

Force-velocity relationship in cycling revisited: benefit of two-dimensional pedal forces analysis.

Although data from force-velocity test primarily characterize the muscular function involved in the downstroke phase, they also reflect the flexor muscles' ability to actively pull on the pedal during the upstroke, accounting for differences in power between subjects at high pedaling rates.

Which factors determine the optimal pedaling rate in sprint cycling?

It is concluded that the pedaling rate that maximizes mechanical power output in sprint cycling follows from the interaction between activation dynamics and Hill's power-velocity relationship.

Optimal design parameters of the bicycle-rider system for maximal muscle power output.

A governing relationship for repetitive muscular contraction.

Maximal power outputs during the Wingate anaerobic test.

The data suggest that resistance be assigned according to the subjects BW but consideration be given to increasing the resistance from that presently used in various laboratories.