Treadmilling - the new Extreme Sport. Death and injury are constant companions - when it’s your time, it’s your time. You timid base jumpers and mountaineers, go treadmilling if you dare!
And i agree, people don’t use the gym at hotels, so i don’t know why they bother putting one in (although i love it because i always get to use the machines).
Running is fun and exercise your body and your heart. anything extreme can be bad, but not doing any exercise at all is probably the worst of all.
I almost always use the hotel gym. Most people don’t, but many still care that it is part of the full service package. For those people who do use the gym, the lack of one can be a deal breaker when there is competition. I also find that frequent business travellers tend to have a fitness routine, and often, this includes hotel gym use, since this is the most efficient way for them to exercise.