Here is a little workout routine that I use sometimes when I dont cant go to the boxing gym or run, usually when I have my daughter and dont have someone to watch her. (part time dad) And I do not have a treadmill.
I would do this in my room or the garage
Warm up - 3 to 6 x 3 minute rounds shadowbox
100 regular situps
100 leg raises
100 crunches
100 mountain climbers
100 leg lifts up and down (walking up a wall), sit-up position.
100 leg lifts side to side (over and under), sit-up position.
60 circular crunches each (hands folded on chest) to right and left
30 pushups
30 wide arm pull ups
30 closed fist pushups
30 chin-ups
30 diamond pushups
30 pullups
They I would repeat the pullups and chinups maybe 2 more times depending on how I feel.
I would add some burpees at the end sometimes, 5 minutes none stop, or a few sets of 20 burpess.
sometimes I will use a 10 lb medicine ball with my situps.
This little routine I do when I dont train hard just because I start feeling crappy if I do not work out at all. I hope this helps someone if they follow this little routine.
dont forget, drink your protein right after. I love Optimum Nutrition Gold Standard 100% , its a bit expensive but it works really good.