Welcome to the fourth day of the Fitolution . . .
Stick with your cardio routine i.e. walk, jog, run, bike, swim, elliptical, row machine, stairs, etc. Make sure it’s at least 30 minutes long. If you’re stuck in the house due to snow or ice, try a Tabata of 30/10 – 4 reps of 5 calisthenics. Examples: Pulsing squat, alternate leaping lunge, jumping jack, mountain climbers, walk-out push-up.
When there is no weight and no machines around, you have to be creative with what you do to help build muscle and get a nice physique. It’s pretty tough to get a good physique and build mass without weights, but you can use resistance.