easy · LSAT Logical Reasoning

A fitness coach claims that high-intensity interval training (HIIT) always leads to greater fat loss than moderate-intensity steady-state cardio. The coach cites a study involving 50 participants.

Which one of the following, if true, most weakens the coach's claim?

  1. Many participants in the coach's study said they felt more energized and fit after their HIIT sessions.
  2. Sustaining high-intensity training over long stretches demands a great deal more motivation and effort.
  3. Steady-state cardio is often favored by older adults because it places less strain on the joints and heart.
  4. In a clinical trial, participants doing steady-state cardio lost noticeably more body fat than those doing HIIT.
  5. HIIT is so superior that steady-state cardio produces no fat loss for anyone under any circumstances.

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