I do most of my core work off the ground. two simple rules of exercise. back pain and body temp will slow you down
I use a door frame pull up device. hang in the air keeping my elbow at a 90 degree angle, and pull my knees to my chest
Once to the left, straight up, then to the right (both knees together)
it will be awkward at first, so get used to it before you set rep goals. try and just hang for as long as you can at first. just keep at it and your endurance will improve and you can do more.
remember the pain is the sign its working.
when you get to rep's, after your reps, drop down for whats called "bows and tows"
basically your forearms on the ground (hands to elbows), and you knees. keep you stomach in the air as long as you can
when you get used to that, as your holding bows and toes, sway your hips side to side to work those muscles. I have incorporated "push ups" from this position. bows and tows, and try to put your head in your hands while keeping your elbows on the ground.
sounds easy, but try and do 20.
after keeping bows and toes for 10 minutes, the push up part sucks, but gets a lot done.
cut sugar and eat at appropriate times. eat breakfast, and never eat less then 4 hours before bed.
for breakfast I eat a lot of raw almonds, salads, tuna sandwich's, and fruit juice.
don't eat a lot of meat or bread at dinner. and never be full. always be a little hungry
and don't forget to breathe while doing core work.
thats an easy way to lower your body temp and get more work done
give it 3-6 months of doing it every day until you get a rep system down, don't over do it when you start or you'll get nothing done.
if your wondering, I do 2 hours of cardio and core work 4 times a week
10 sets of 50 pull ups
10 sets of 20 knee pulls (which 3 count as one)
10 sets of leg extension (elbow at 90 degree angle, holding my legs straight out at the waist as long as I can, counting, and doing 10 more times while holding it as long as the first time, or it doesn't count)
30 mins of bows and toes with 2 min breaks every 10, where I stretch
10 mins of moving my hips left to right, and then turning my hips as far as I can
I don't always stick to it, but I try
good luck, sorry if this is long, but I hope it helped
eat a lot of fish too. works for me. but not fried. baked is so much better for you. always bake white meats
I wish I knew the "Stones" system for weight. it just sounds cool