Oxygen Consumption and Speed of Cycling Using an Air-Resistance Simulator on a Hometrainer Roller

Vrielink, H.H.E. Oude; Vissers, A. C. A.; Binkhorst, R. A.

doi:10.1055/s-2008-1025888

Cited by 7 publications

(3 citation statements)

References 3 publications

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“…The study populations considered in these publications totalled 670 subjects. The running test was also applied to 274 children and adolescents (5,6,7). Subjects varied widely i n athletic ability, from sedentary individuals to world-class athletes (see Table 1).…”

mentioning

confidence: 99%

The Conconi Test: Methodology After 12 Years of Application

Conconi¹,

Grazzi²,

Casoni³

et al. 1996

Int J Sports Med

138

135

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The protocol for the determination of the speed/heart rate relationship during incremental exercise previously described (so-called Conconi test) has been refined and in part modified during 12 years of application. The new protocol calls for time-based increments in exercise intensity that are uniform up to submaximal speeds and progressively greater in the final phase. As in the original article (18), the speed/heart rate relationship is linear at low to moderate speed and curvilinear from submaximal to maximal speeds. A method is presented for the mathematical definition of this relationship, with the calculation of the straight-line equation of the linear phase and the identification of the point of transition from the linear to the curvilinear phase (deflection point or heart rate break-point). Analysis of 300 tests selected at random from those in our data base (more than 5,000 tests) has enabled us to show that the speed at which the deflection point occurs is significantly lower (p < 0.001) than that at which the acceleration of the final phase begins. This fact demonstrates that the break-point is not brought on by the final acceleration called for in the test protocol. Analysis of the speed/heart rate relationship allows for the determination of the following additional functional indices: 1) maximal heart rate (in 21 athletes the maximal heart rate attained in the test and that attained while racing were equal); 2) range of heart beats defining the linear part of the speed/heart rate relationship; 3) range of heart beats from the deflection point to maximal heart rate; and 4) maximal aerobic exercise intensity, obtained through extrapolation of the straight-line equation to maximal heart rate. Data are provided on the conditions of the test subject that modify his speed/heart rate relationship, such as incomplete recovery from previous efforts, inadequate warm-up, or inadequate test procedure with too rapid increments in exercise intensity. Finally, criteria for test acceptability are presented.

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mentioning

confidence: 99%

The Conconi Test: Methodology After 12 Years of Application

Conconi¹,

Grazzi²,

Casoni³

et al. 1996

Int J Sports Med

138

135

View full text Add to dashboard Cite

show abstract

“…The rotating fans created wind resistance by impelling air. The speed/power output relationship using this type of wind-load simulator has been reported to be similar to that described in track cycling (Oude Vrielink et al 1984) and has been used by several authors (Gore et al 1996;Hue et al 2001). The saddle was individually adjusted to optimize rider comfort and performance, and the chainrings were equipped with standard pedals.…”

Section: One-km All-out Testmentioning

confidence: 79%

“…This was reinforced by the relatively high mechanical values recorded at the end of the test (i.e., after 1 min of supramaximal effort). However, the Cycletrack has been validated by Oude Vrielink et al (1984) for ergometry and training. These authors reported similar VO 2 and cycling velocity on a roller system with air-resistance simulation as during cycling outdoors on a touring bicycle.…”

Section: Discussionmentioning

confidence: 99%

Cycling performance and mechanical variables using a new prototype chainring

et al. 2007

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The primary aim of our study was to examine supra-maximal cycling performance and related mechanical variables in trained cyclists using a new prototype chainring (PC) designed to produce a higher mean net torque (T (N mean)) than a standard chainring (SC). The main feature of the PC is that crank-arm alignment and lever-arm length change as a function of the crank angle during the pedaling cycle. The PC presents two features theorized to effect cycling performance: (1) out of line of pedal cranks resulting in an decrease in the dead points, and (2) a change in crank arm length inducing a torque different from that of SC during the down- and up-stroke of the pedaling cycle. To investigate this theory, we examined eight male cyclists who performed a 1-km "all-out" cycling test in the following order: SC, PC, and SC. Performance was measured as the time (s) to complete the 1-km test. Mechanical variables included torque (N m(-1)), crank velocity (rad s(-1)), and power output (W). We performed our statistical analysis using a two-way ANOVA for repeated measurements and Newman-Keuls post hoc assessment. Our results showed that performance was similar for SC (69.41 +/- 6.69 s) and PC (73.33 +/- 4.58 s). Torque, crank velocity, and power output were also similar throughout (P > 0.05). We conclude that despite the theoretically benefits proposed by the inventors the new PC investigated in our study failed to improve cycling performance or mechanical variables during a supramaximal test when compared with SC.

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Physiologic Aspects of Bicycling

Ryschon

1994

Clinics in Sports Medicine

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Oxygen Consumption and Speed of Cycling Using an Air-Resistance Simulator on a Hometrainer Roller

Cited by 7 publications

References 3 publications

The Conconi Test: Methodology After 12 Years of Application

The Conconi Test: Methodology After 12 Years of Application

Cycling performance and mechanical variables using a new prototype chainring

Physiologic Aspects of Bicycling

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