title: Reproducibility of peak power output during a 10-s cycling maximal effort using different sampling rates.
abstract: The study was aimed to investigate the reproducibility of performance parameters obtained from 10-s maximal cycling effort against different braking forces in young adult athletes. The sample (n = 48) included male athletes aged 18.9-29.9 years (175.5 ± 6.9 cm, 76.2 ± 10.1 kg). The exercise protocol was performed in a cycle-ergometer against a random braking force (4% to 11% of body mass). Intra-individual variation was examined from repeated tests within one week. Descriptive statistics were computed and differences between sessions were tested using paired t-test. The coefficient of correlation between repeated measures, technical error of measurement (TEM), coefficient of variation and ICC were calculated. Agreement between trials was examined using the Bland-Altman procedure. Mean values of peak power were relatively stable when obtained from sampling rates of 50 Hz and ranged between 1068 watt and 1082 watt (t(47) = 1.149, p = 0.256, ES-r = 0.165) or while corresponding to a sampling rate of 1 Hz (t(47) = 0.742, p = 0.462, ES-r = 0.107). Correlations between repeated measures were high (+0.907, 95% CI: +0.839 to +0.947) and TEM about 59.3 watt (%CV = 5.52%; ICC = 0.951, 95% CI: 0.912 to 0.972). The present study suggests that reproducibility of peak power in male adult athletes tended to be acceptable and within individual error appeared unrelated to braking force.
authors.affiliation: University of Coimbra Faculty of Sport Sciences Pavilhao III 3040-156 Coimbra Portugal.
authors.forename: J P
authors.initials: JP
authors.lastname: Duarte
authors.affiliation: University of Coimbra Faculty of Sport Sciences Pavilhao III 3040-156 Coimbra Portugal.
authors.forename: Manuel J
authors.initials: MJ
authors.lastname: Coelho-E-Silva
authors.affiliation: University of Coimbra Faculty of Sport Sciences Pavilhao III 3040-156 Coimbra Portugal.
authors.forename: V
authors.initials: V
authors.lastname: Severino
authors.affiliation: University of Coimbra Faculty of Sport Sciences Pavilhao III 3040-156 Coimbra Portugal.
authors.forename: D
authors.initials: D
authors.lastname: Martinho
authors.affiliation: University of Coimbra Faculty of Sport Sciences Pavilhao III 3040-156 Coimbra Portugal.
authors.forename: L
authors.initials: L
authors.lastname: Luz
authors.affiliation: University of Coimbra Faculty of Sport Sciences Pavilhao III 3040-156 Coimbra Portugal.
authors.forename: J R
authors.initials: JR
authors.lastname: Pereira
authors.affiliation: University of Coimbra Faculty of Sport Sciences Pavilhao III 3040-156 Coimbra Portugal.
authors.forename: R
authors.initials: R
authors.lastname: Baptista
authors.affiliation: University of Coimbra Faculty of Sport Sciences Pavilhao III 3040-156 Coimbra Portugal.
authors.forename: J
authors.initials: J
authors.lastname: Valente-Dos-Santos
authors.affiliation: University of Coimbra Faculty of Sport Sciences Pavilhao III 3040-156 Coimbra Portugal.
authors.forename: A M
authors.initials: AM
authors.lastname: Machado-Rodrigues
authors.affiliation: University of Coimbra Faculty of Sport Sciences Pavilhao III 3040-156 Coimbra Portugal.
authors.forename: V
authors.initials: V
authors.lastname: Vaz
authors.affiliation: University of Coimbra Faculty of Sport Sciences Pavilhao III 3040-156 Coimbra Portugal.
authors.forename: A
authors.initials: A
authors.lastname: Cupido-Dos-Santos
authors.affiliation: Miguel de Cervantes European University Faculty of Health Sciences Valladolid Spain.
authors.forename: J
authors.initials: J
authors.lastname: Martín-Hernández
authors.affiliation: University of Bath Department for Health Bath UK.
authors.forename: S P
authors.initials: SP
authors.lastname: Cumming
authors.affiliation: University of Texas Department of Kinesiology and Health Education Austin TX USA.
authors.forename: R M
authors.initials: RM
authors.lastname: Malina
mesh_terms: D000328:Adult; D001642:Bicycling; D005080:Exercise Test / Q000379:methods*; D006801:Humans; D008297:Male; D009119:Muscle Contraction; D053580:Muscle Strength; D018482:Muscle, Skeletal / Q000502:physiology*; D011237:Predictive Value of Tests; D015203:Reproducibility of Results; D013997:Time Factors; D055815:Young Adult
keywords: Bland-Altman plot; anaerobic power; cycle-ergometer; intra-class correlation; short-term maximal intensity effort; technical error of measurement reliability