There are several type of rubber bands with different degrees of
tension.
You can also double up on the bands. Even surgical tubing will work.
Another method is the adding a solid resistance. Training partners
of various body weights works well. Here I'm doing simple push ups
with my one of my protégés, 123 lb Olympic & Power
Lifter,
Robbie Walden.
A SIMPLE WORKOUT FOR THE ABOVE EXERCISE!!!
First set: 25 reps minimum in the strictest style.
Second set: Add a human resistance, preferably
someone prettier than Robbie, then do 5 to 10 reps.
Final sets: Add someone 25 to 50 lbs heavier,
than the first human resistance, and do
3 to 5 reps for an additional 3 to 5 sets.
All the best with your training. JVA