Caution seniors

Ive enjoyed the program and benefited. However, Im an aerobically fit 68 years old who does some light weight-training as well. However, Ive had some issues with Gorilla:
1) my knees arent so healthy and the number of squats and lunges seems to be aggravating and sometimes leads to joint pain.
2) I found the squat-thrusts encountered at level 2 caused severe low back pain and stiffness the next day.
3) Ditto for classic sit-ups at level 2.
4) I couldnt do the pull- ups when I got to level 2. There are no work-arounds offered when you cant do an exercise or it causes pain.
I still do it but omit exercises that are problematic.

Eastw00d about Gorilla Workout: Build Muscle, v5.1.1