A 36-year-old athlete exercised on a stationary bicycle for 8 minutes. A fitness tracker recorded her heart rate every minute. The table below shows the results:
| Time (minutes) | Heart rate (beats per minute) |
|---|---|
| 0 | 65 |
| 1 | 90 |
| 2 | 115 |
| 3 | 135 |
| 4 | 150 |
| 5 | 160 |
| 6 | 165 |
| 7 | 165 |
| 8 | 165 |
The safe maximum heart rate for a person exercising can be calculated using the formula: safe maximum heart rate=220−age in years\text{safe maximum heart rate} = 220 - \text{age in years}safe maximum heart rate=220−age in years Calculate the safe maximum heart rate for this athlete.
Identify the athlete's maximum recorded heart rate during the exercise from the table.
The athlete concluded that she exercised within a safe heart rate limit. Explain whether this conclusion is correct by comparing your answers to parts 1 and 2.
Practise AQA GCSE Biology Respiration with exam-style questions for Foundation and Higher tier. 16 questions covering Aerobic and anaerobic respiration, Response to exercise, and Metabolism, matched to the AQA GCSE Biology (8461) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.