I'm not fit. I'm in my early 30s. I struggle to do 10 push-ups, crunches/sit-ups hurt my back, and I can't jog more than 5 minutes without feeling exhausted. I'm not too fat, just crossing the 'overweight' line in regards to BMI.
I've picked up a few health magazines, and the proposed exercises are way out of my league - I can barely do a few push-ups, much less do them between other exercises. I find gyms a little too expensive and out of my daily route and will probably quit if I have to rely on one. I've searched on the Internet, but I can't really figure how reliable those sites and blogs are.
Right now, I'm interested in just doing about 30 mins of exercises a day before my morning shower. I figure if I can comfortably maintain a routine of 30 mins of exercise a day, I'd be in shape to go higher. If possible it should be without equipment, though dumbbells or anything available at home should be fine.
I'm not so interested in strength/muscle building, but in improving stamina, not getting diseases, improving posture, and just plain feeling good.