Did some interval training on the treadmill->4 minutes walk followed by 1 minute run. I started at 6.5 mph and worked up to 7.0 by 0.1 mile increments, then did one set at 7.5 and five sets at 8.0. My HR was oscillating between 180 following the interval and 120-130 during the walk period. I was walking at a pace of 3.5-4.0. The achilles feels better (but not pain free) after doing yoga last night.
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