Thursday Pre-Race Interval Session 1-mile warmup, then 1 mile at 10-20 BPM higher than normal pace. 3 minutes rest. 1 minute hard (40-50 BPM higher than normal). 2 minutes rest. 30 seconds hard (40-50 BPM higher than normal). 2 minutes rest. 15 seconds hard (40-50 BPM higher than normal).