Exercise economy outcomes include?

Exercise economy outcomes include?

• A. Increased efficiency and delayed fatigue of contractile mechanisms
• B. Higher resting heart rate
• C. Increased energy cost
• D. Greater muscle hypertrophy independent of energy cost

Answer: (A)

Improving exercise economy means using energy more efficiently at a given workload, so you can sustain the same level of work with less energy expenditure and fatigue the contracting muscles more slowly. This is why increased efficiency and delayed fatigue of contractile mechanisms best capture what happens when economy improves — the muscles work more efficiently and for longer before fatigue sets in. The other ideas don’t align with this focus: a higher resting heart rate isn’t a direct indicator of better economy during activity, increased energy cost is the opposite of improved economy, and greater muscle hypertrophy isn’t a direct consequence of economy improvements and can occur independently of energy cost.

Improving exercise economy means using energy more efficiently at a given workload, so you can sustain the same level of work with less energy expenditure and fatigue the contracting muscles more slowly. This is why increased efficiency and delayed fatigue of contractile mechanisms best capture what happens when economy improves — the muscles work more efficiently and for longer before fatigue sets in. The other ideas don’t align with this focus: a higher resting heart rate isn’t a direct indicator of better economy during activity, increased energy cost is the opposite of improved economy, and greater muscle hypertrophy isn’t a direct consequence of economy improvements and can occur independently of energy cost.