SmarterEd

Aussie Maths & Science Teachers: Save your time with SmarterEd

HMS, BM EQ-Bank 369 MC

A student is researching the effect of aerobic training on lactate threshold. Which method would provide the most valid data for this investigation?

  1. Taking blood samples to measure lactate levels at various exercise intensities
  2. Interviewing participants about how tired they feel after training
  3. Surveying participants about their preferred aerobic activities
  4. Observing participants' facial expressions during exercise
Show Answers Only

Show Worked Solution

Consider Option A: Taking blood samples to measure lactate levels at various exercise intensities

  • Taking blood samples to measure lactate concentration at different exercise intensities provides direct, objective data about lactate threshold.

Other Options:

  • B is incorrect: Subjective feedback about tiredness is not a direct measure of lactate threshold.
  • C is incorrect: Preferences for activities don’t provide data about physiological lactate responses.
  • D is incorrect: Facial expressions are subjective and not related to measuring lactate thresholds.