Treadmills, stationary bikes, ellipticals and stairmasters isn't exactely "hardcore".
back that train up coach. Albeit, I agree about the bike..
Elliptical I do more for endurance but stairmaster, surely you jest. I go highest level for at least 60 min, 1200 cal burned and usually 12.5 miles at least.
Treadmill, I don't run outside if its humid (like this week even at 5am) so I run on the treadmill.