Reliability of the parameters of the power-duration relationship using maximal effort time-trials under laboratory conditions

The purpose of this study was to assess the reliability of critical power (CP) and the total amount of work accomplished above CP (W´) across repeated tests using ecological valid maximal effort time-trials (TTs) under laboratory conditions. After an initial incremental exercise test, ten well-trained male triathletes (age: 28.5 ± 4.7 yrs; body mass: 73.3 ± 7.9 kg; height: 1.80 ± 0.07 m; maximal aerobic power (MAP): 328.6 ± 41.2 W) performed three testing sessions (Familiarization, Test I and Test II) each comprising three TTs (12 min, 7 min and 3 min with a passive recovery of 60 min between trials). CP and W´ were determined using a linear regression of power vs. the inverse of time (1/t) (P = W´ ∙ 1/t + CP). A repeated measure ANOVA was used to detect differences in CP and W´ and reliability was assessed using the intra-class correlation coefficient (ICC) and the coefficient of variation (CoV). CP and W´ values were not significantly different between repeated tests (P = 0.171 and P = 0.078 for CP and W´, respectively). The ICC between Familiarization and Test I was r = 0.86 (CP) and r = 0.58 (W´) and between Tests I and II it was r = 0.94 (CP) and r = 0.95 (W´). The CoV notably decreased from 4.1% to 2.6% and from 25.3% to 8.2% for CP and W´ respectively. Despite the non-significant differences for both parameter estimates between the repeated tests, ICC and CoV values improved notably after the Familiarization trial. Our novel findings indicate that for both, CP and W´ post familiarization ICC and CoV values indicated high reliability. It is therefore advisable to familiarize well-trained athletes when determining the power-duration relationship using TTs under laboratory conditions

Different durations within the method of best practice affect the parameters of the speed-duration relationship

The aim of the study was to determine whether estimates of the speed-duration relationship are affected using different time-trial (TT) field-based testing protocols, where exhaustive times were located within the generally recommended durations of 2 to 15 min. Ten triathletes (mean±SD age: 31.0±5.7yrs; height: 1.81±0.05m; body mass: 76.5±6.8kg) performed two randomly assigned field-tests to determine critical speed (CS) and the total distance covered above CS (D´). CS and D´ were obtained using two different protocols comprising three TT that were interspersed by 60 min passive rest. The TTs were 12, 7, and 3 min in Protocol I and 10, 5, and 2 min in Protocol II. A linear relationship of speed vs. the inverse of time (s=D´x1/t+CS) was used to determine parameter estimates. Significant differences were found for CS (P=.026), but not for D´ (P=.123). The effect size for CS (d=.305) was considered small, whilst that for D´ was considered moderate (d=.742). CS was significantly correlated between protocols (r=.934; P<.001), however, no correlation was found for D´ (r=.053; P=.884). The 95% limits of agreement were ±0.28m∙s-1 and ±73.9m for CS and D´, respectively. These findings demonstrate that the choice of exhaustive times within commonly accepted durations, results in different estimates of CS and D´ and thus protocols cannot be used interchangeably. The use of a consistent protocol is therefore recommended, when investigating or monitoring the speed-duration relationship estimates in well-trained athletes

For Love of the Word: a New Translation of Pelliot tibétain 1287, the Old Tibetan Chronicle, Chapter I

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Facts and attitudes: on the so-called ‘factual’ markers of the modern Tibetic languages [HL ARCHIVE 14]

The evidential or egophoric systems of various modern Tibetic languages are described as containing a ‘factual’ copula and a complex ‘factual’ existential, in opposition to the egophoric copula yin and the egophoric existential linking verb yod, e.g., Central and East Tibetan red and yod.red. Other descriptive terms are ‘assertive’ or ‘statemental’. These two markers are also described as being ‘neutral’, falling thus outside the ‘evidential’ system. In my opinion, the terms ‘actual’ and ‘neutral’ are not very well defined. They are used as cover terms for various functions, such as referring to generic facts and shared or shareable knowledge, as indicating inferences and assumptions, even as describing mere hypothetical situations, as expressing or highlightening the speaker’s non-involvement, or for other socio-pragmatic strategies. The terminological choice poses quite some problems, both with respect to the crosslinguistic use of ‘factual’ in the sense of realis mood (as opposed to various irrealis moods) and with respect to the position of the respective marker inside or outside the Tibetic evidential or egophoric system. Part of the problem may be connected also with the current understanding of the Tibetic evidential or egophoric systems

Eat and drink – if you can! A language internal explanation for the ‘irregular’ paradigm of Tibetan za, zos, zo ‘eat’

Abstract: The paper discusses recent suggestions that Tibetan may originally have had a system of person marking, which could thus be reconstructed for proto-Tibeto-Burman. While self-evident traces of such person marking are clearly missing, the ‘irregular’ paradigm of the verb ‘eat’ has been taken as indirect evidence. This proposal, however, is in need of several further assumptions. The ‘irregular’ stem forms zos and zo, on the other hand, correspond to a regular, albeit obsolete modal derivation of ability in Old and Classical Tibetan