Try this for a speedy workout in the gym, if you are unable to run outside, due to poor weather.
Total Time: 50 minutes, including rests between workouts.. but it is guaranteed to burn!
50 reps to warm up
Backward Lunge Kick Up
25 reps on each leg
Girl Push Ups (Knees on Floor)
Time: 4:24 (modified: waist-high incline)
Sumo Squats Knee Up
Hold it.. hold it (add in side plank for added difficulty)
Side to Side Squat & Leg Lift
Running on the spot as fast as you can
Bring your knees up to your waist level
Do not lean forward, keep your back straight
Alternating left and right leg
Side Plank Lift
25 reps on each side
Time: 3:35 (modified: lower leg bent forward)
All the way to the end! Go for muscle failure!
Time: 1 min