DO A TEMPO RUN: When you do a "tempo" run, also called a "lactate threshold" or "LT" run, you go as fast as you can run before lactic acid accumulates in the blood. This accumulation causes muscle fatigue (not soreness as the old myth says). By running at your lactate threshold (LT) pace, which is roughly your 10K pace, you train your body to delay the onset of lactic acid. So let's try it! For today's workout, warm up for 15 minutes, then run at your 10K pace (or comfortably hard) for 10 minutes. Warm down for 15 minutes.
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