If it's raining outside and you don't want to go to the gym, you can get the same workout at home with resistance bands.
Forget weights — this 4-move workout builds upper-body muscle with just a set of resistance bands
Full-Body Resistance Band Workout
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A 30-Day Resistance Band Workout Plan for Beginners
Bodylastics Resistance Band Set-Resistance Bands with Handles, Ankle Straps, Door Anchor, Carry Bag Heavy-Duty Stretch Exercise Bands-Patented Clips and Snap Reduction Tech (3-142LBS Set Assorted) : Sports & Outdoors
8 Resistance Band Exercises For Legs (Video)