12x400m intervals (400m jog between each) on the treadmill in the basement. Roughly 1-mile warmup and cooldown. Since this was my first interval workout in well over 2 years, I didn't want to go crazy, so I set the speed at 10 (6 min/mile) for the first 8, then increased it to 10.5, then 11, then 12 (just for the final one). Felt pretty good, although I was a little gassed by the last one at 5-min pace.
Injury Watch: Some pain in left SI joint, so I need to get going on some core work.
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