I work a 9-5 with a 40 minute commute each way. That 40 minutes includes 20 minutes of walking which lessens my need for other exercise. I get plenty of time with my 17-month old. 6-8 in the morning and 5:30-7:30 at night.
On the flip side, my wife works from home and loves her breaks when she can spend time with our child. She is also often lamenting a lack of time for exercise and social activities.