Yeah, it depends on what kind of shape you are in. If you're not in good running shape and your glycogen stores are depleted, or your CNS is fatigued, you won't be able to lift that hard. But, it's not bad idea to do both on the same day, once you're in shape. The key is recovery, you should feel pretty fresh before you start lifting. In fact, Tudor Bompa recommends combining different energy system workouts on the same day, ie aerobic + alactic. But, you wouldn't want to do intervals in the morning and max strength lifting the same day. Listen to your body, and take it slow.