I still haven't beaten Level 7 (not working out will do that), but, last summer, when I was working out regularly, I found myself in your position; unable to string together enough reps to beat Day 3. I too tweaked Day 2 to help with Day 3. This is what I did and it did improve my numbers:
Combine the sets of Day 2 into bigger sets.
Day 2 is 5 rounds. I tried these combinations:
- Combo 1 (I did this.)
- 1 single round
- 2 double rounds
- Combo 2 (I didn't try this.)
- 1 single round
- 1 triple round
- 1 single round
- Combo 3 (I did this.)
- 1 single round
- 1 quadruple round
A double, triple, or quadruple round means combining all of the reps of each exercise into one set. This will build your endurance for Day 3.
For example, a
single round of D2L7 looks like:
8 pull-ups / 24 push-ups / 40 squats
A
quadruple round of D2L7 looks like:
32 pull-ups / 96 push-ups / 160 squats
I have never added weight to a SF workout, but I would think that would help too.