Lactate Lab_and VT 2023

KIN 359 – 2022 MEASUREMENT OF THE BLOOD LACTATE RESPONSE TO GRADED EXERCISE AND DETERMINATION OF THE LACTATE AND VENTILATORY THRESHOLDS Data Analysis Perform the data analysis on the subject from your group using the data provided in Canvas. Danielle’s Data Collection Sheet Stage Time (Min) HR (bpm) RPE Workrate (W) Lactate VO2 (mL/kg/min ) Rest 0 100 6 60 3 0.45 1 3 116 7 80 1.4 1.10 2 6 146 9 100 5 1.54 3 9 155 12 120 9.1 1.77 4 12 173 13 140 8.3 2.18 5 D-N-C 173 15 160 7.7 2.18 … X X X X X X Rest X X X X X X Final 1 X X X X X X Final 2 X X X X X X 1. Create a table showing subject characteristics (height, weight, sex, age, VO2peak, etc.). (3 points) Danielle’ s Informati on Height Weight Sex Age VO2 Peak 1.753 m 70 kg Female 20 43.7 2. Construct a graph of blood lactate versus time. To visually determine the lactate threshold, determine the minute just before the onset of a systematic, sustained increase in lactate above baseline values. The exercise intensity or rate of aerobic metabolism during this minute is the lactate threshold. Identify it on the graph. Report the time at which the LT occurred, the corresponding VO2, relative intensity (%VO2peak), HR, RPE, and work rate. Report the data in a table similar to the one shown below. (5 points) 1

0 1 2 3 4 5 6 7 8 0.0 5.0 10.0 15.0 20.0 Lactate Prodction while Exercising Time (stages / min) Lactate (mmol) 3. Obtain 2 more estimates of the lactate threshold or OBLA. Specify and label the criterion ( highlighted below) you selected to determine each (e.g., 2 mmol/L above baseline or 4 mmol/L). Report the data in the same table as in #2 (similar to the one shown below). (5 points) 4. Determine Ventilatory Threshold using 3 different methods (you will need to construct a separate graph for each method (3 total)). Report results in a table similar to the one shown below. (9 points) Table example: Lactate Threshold Ventilatory Threshold Variable LT OBLA 2mmol OBLA 4mmol Ventilati on vs Watts V-Slope Vent Eq. Work Rate (Watts) V.O 2 (ml/kg/min) % V.O 2max Heart Rate (bpm) RPE 140 _25.72_ _58.8_ _143 _ __12___ _ 120_ __22.51_ __51.4__ __126___ ___8___ __160__ __29.76__ __68__ __158__ __14__ __140__ __25.72__ __58.8__ __143__ ___12___ __160__ __29.76__ __68__ __158__ ___14___ __220__ __43.73__ __100__ __191__ __20__ 2