I am obese (300 pounds now, down 40 pounds) and have been for the better part of my life. As I've acquired a great interest in medicine and sports medicine I've decided to shed most of my weight and get as fit as possible as I applied to medical school and got accepted (as it would be quite hypocritical to be a fat doctor). I have 4 months left till I start and I am aware that I cannot reach a healthy weight by then, but I'll be on my way there and I can handle a few stares.
This is my current exercise regime (I just graduated from high school, don't have a job so during down time from exercise I sit at home and read, play):
3x a week (mon, wed, fri): Wake up, do "foundation training" which includes stretches for posture, walk 3 kilometers (1.8 miles) to the gym, do Stronglifts 5x5 (squats, bench, deadlift, rows and press), walk home 3 kilometers. At home, do grip training.
3x a week (tues, thurs, sat): Wake up, do "foundation training", walk 5 kilometers to a place I like to do cardio, do couch-to-5k training (intervals), rest for a little bit on a bench and then walk home 5 kilometers. Total 11-12 km.
Sundays: Take a 5-20 kilometer (3-12 miles) walk depending on mood.
On top of this, when I'm at home playing/reading/watching movies I get up every 30 minutes to move for 5-10 minutes and clean the house a bit, get some water and so on so I work up a sweat over 8 times a day. But the problem is with the above training and standing up regularly, I still sit down for an average 8 hours a day. I have purchased an ergonomic chair and I've noticed that my posture is a lot better with my exercise (especially the stretching in morning, squats and deadlifts help a lot) but I still sit down too much. How can I change this? I've heard sit/standing desks are good, but I also need a new pair of running shoes now that winter is coming and I have to transition to treadmills and so I can't afford both.
Also, do I need to incorporate another exercise form? I've heard stretches before/after activity can be good but I feel that my morning stretches leave a great impact for the rest of the day.