Table 2.

Aerobic exercise progression^a protocol.

Week	Duration (minutes)	Intensity (PCERTb level)
1	10	4
2	15	4
3	15	5
4	20	5
5	20	6
6	30	6

^aProgression was only recommended if significant symptom exacerbation did not occur in the previous week.

^bPCERT: Pictorial Children’s Effort Rating Table.