Runners listen up! You may be running in a shoe that is too heavy. Do your calves and knees get super sore after long runs? We asked in-house running expert at Eat Smart Age Smart what she thought. She said that after years of running in Asics, she recently switched to Mizuno on a recommendation from a running expert and they changed her form and comfort level. Knees do not get as fatigued as with heavier shoes and calves seem to have less stress put on them. Mizuno running shoes are super light weight but provide enough support for your longest runs. It is hard enough to run with your own body weight, why add heavy shoes?