Hey Kittie!
How effective is running? - In terms of what?
If were talking about calorie expenditure. Than it can be a solid tool for expending calories, given intensity and duration are in check.
Do people just do that? - Sure, some people do just that. However, its likely not going to be considered "optimal".
Not to mention, the body can do an amazing number of things. Meaning a nearly uncountable number of ways to expend calories. So, why make exercise mundane? Mix it up, bike, swim, resistance train,run,stairs,HIIT,rock climb, and so on are just a small number of solid exercise ideas.
Are personal trainers worth it? - This is up to the individual and the individuals goals. Do you "NEED" a C-PT? Of course not, but they can be helpful. The problem is ensuring you found a competent trainer. As, there are a number of complete idiots out there with certifications.
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OFF TOPIC,
Hey, hows veterinarian school? Whats the average completion time? 4-6-8 years?
BTW, have you had a chance to play halo 3 yet?
