A weightlifter prepares for a maximum effort deadlift. Which of the following best describes the interrelationship between the endocrine and muscular systems during this lift?
- Growth hormone decreases to reduce muscle metabolism while the muscular system produces lactic acid
- Insulin increases to facilitate glucose uptake while the muscular system relies on aerobic metabolism
- Adrenaline increases to mobilise energy while the muscular system recruits high-threshold motor units
- Melatonin decreases to enhance alertness while the muscular system reduces power output