Runs a set of checks on the test and the results of lactate_threshold(), so problems that are easy
to miss in a table of numbers are flagged: too few stages, no resting sample, thresholds that were not
reached or sit at the edge of the tested range, an early lactate dip or a final plateau, a test that may
have stopped before the second lactate turn point, and methods that rely on fixed blood lactate
concentrations used on another sample type.
Arguments
- x
The result of
lactate_threshold().
Value
a tibble with one row per check: check, status ("ok", "note", or "warning"), and
details. It prints as a checklist, with a tick for each check that passed.
References
Hofmann P, Pokan R, von Duvillard SP, Seibert FJ, Zweiker R, Schmid P. Heart rate performance curve during incremental cycle ergometer exercise in healthy young male subjects. Medicine & Science in Sports & Exercise. 1997;29(6):762-768.
Bonaventura JM, Sharpe K, Knight E, Fuller KL, Tanner RK, Gore CJ. Reliability and accuracy of six hand-held blood lactate analysers. Journal of Sports Science and Medicine. 2015;14:203-214.
Foxdal P, Sjodin B, Rudstam H, Ostman C, Ostman B, Hedenstierna GC. Lactate concentration differences in plasma, whole blood, capillary finger blood and erythrocytes during submaximal graded exercise in humans. European Journal of Applied Physiology. 1990;61(3-4):218-222.
Examples
results <- lactate_threshold(demo_data, intensity, lactate, heart_rate, plot = FALSE)
lactate_checks(results)
#> 10 checks: 9 passed, 1 note, 0 warnings
#> ℹ Stages 7 stages: the LTP fit has 6 parameters, so 1 degree of freedom is left and LTP can move a lot with one stage (at least 8 stages are better); the fitted curves rest on few points too.
#> ✔ Resting sample Present.
#> ✔ Thresholds found All thresholds were found.
#> ✔ Edge of the range No threshold sits at the first or last stage.
#> ✔ Early lactate dip No early dip.
#> ✔ Final stage Lactate rose in the last stage.
#> ✔ Peak lactate 8.6 mmol/L.
#> ✔ Sample type blood lactate.
#> ✔ LT1 Within 18% of peak (5 methods, LTratio 77 to LTP1 111).
#> ✔ LT2 Within 22% of peak (8 methods, Bsln + 1.5 118 to LTP2 160).