| Date | November 2020 | Marks available | 2 | Reference code | 20N.3.SL.tz0.9 |
| Level | Standard Level | Paper | Paper 3 | Time zone | time zone 0 |
| Command term | Outline | Question number | 9 | Adapted from | N/A |
Question
Outline the effect of age on peak bone density
[2]
a.
Discuss the impact of exercise on bone density.
[3]
b.
Markscheme
Bone density:
increases from birth to the age of 35–45;
decreases from then on;
age of peak bone density is dependent on gender;
a.
weight-bearing / resistance training have positive effects on bone density;
resistance training results in greater changes than aerobic training;
overtraining can cause reduction in bone density;
quantity of training that leads to low body weight can cause reduction in bone density
OR
lack of exercise can cause reduction in bone density;
b.
Examiners report
No issues.
a.
Limited success here to fully apply the benefit of exercise on bone density.
b.
