alleryStart learning →What is the current standing of the old belief that lactic acid build-up causes muscle stiffness and soreness?
AIt has been confirmed by recent research
BIt is disputed by more recent research
CIt has never once been investigated
DIt applies only to trained athletes
Answer & Solution
Correct answer: B. It is disputed by more recent research
1. Lactic acid accumulation was once believed to cause muscle stiffness, fatigue and soreness.
2. More recent research disputes that hypothesis.
3. So the link is best treated as an old idea now under challenge rather than a settled fact.
4. Claiming confirmation reverses the position that later work actually took.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 7 "Cellular Respiration", section 7.5 Metabolism without Oxygen_
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