If you have a bit of a yard why don't you try create a little cardio circuit. From push ups, squats, burpies, sprints, lunges, maybe som light weight shoulder presses etc and variations of these exercises... Run them on a timer at 30secs intervals with no more than 5 sec rest between intervals.. Make sure you keep your blood moving around your body by alternating from upper body to lower body with every interval... Do all this for 30-40 mins at a high intensity... Give that a go.. It's somthing you could do with minimal equipment..