A sports scientist investigates the impact of a high-intensity 30-second cycle sprint on the heart rate of three rowers.
The rowers' heart rates are measured at rest by manual pulse palpation for 1 minute. Then, they perform a 30-second maximal effort sprint on a cycle ergometer. Immediately after the sprint, their heart rates are measured again.
Their recorded measurements are:
Display these results in a suitable table.
Explain why heart rate is higher after exercise.
Explain how the sports scientist could improve their investigation.
55 exam-style questions on Edexcel IGCSE Biology Transport. Each one has a worked solution and a mark scheme showing where the marks go.