1 Bike kid trailer that can hold up to 100 pounds.
2 35 pound sand bags
Throw the sandbags in the kid trailer, strap them in and start riding. Small hills become huge mountains and it is a challenge to maintain speed. I kept a moderate place of 12-14 mph. I get very weird looks from people I pass.
After I did this for a month on every ride, I took the trailer off. I have super legs now. I have gained 1-2 lbs of muscle and it is all in my legs.
Next step is to add another 25 pounds and keep up the same pace.











